Erhuvwuvoke Ebojoh - Academia.edu (original) (raw)
Papers by Erhuvwuvoke Ebojoh
Uniport Journal of Engineering and Scientific Research (UJESR), 2022
This paper presents an examination of the wear distribution set up at various points in a die dur... more This paper presents an examination of the wear distribution set up at various points in a die during forging operation by the finite element method. This paper presents the numerical solution to the one-dimensional time dependent differential equation which describes the pressure exerted by forging on a die. In conducting the analysis, the blank was split into a finite number of elements and the Galerkin finite element method was applied to obtain the weighted integral form. The finite element model was then developed and solved to obtain the pressures and stress in an open die forging operation. The results obtained from the present study were compared with the exact solution they were found to be almost identical while the FEM approximates the exact solution for both the quadratic and linear elements graphically. It was observed that the model fits in well with a coefficient of determination (R 2) of 99.8%.
International Journal of Research in Advanced Engineering and Technology, 2018
In this paper, we proposed a new model for predicting the abrasive wear (wear module) in a die du... more In this paper, we proposed a new model for predicting the abrasive wear (wear module) in a die during hot forging processes starting with Shaw's model. The model takes into consideration the deformation energy, sliding velocity and coefficient of friction of the die material and other parameters which was modeled into a differential equation (DE) and can be solved numerically with all necessary boundary conditions and validated against experimental data or through the exact solution method.
The Journal of the Nigerian Institution of Production Engineers , 2022
The effect of chloride ion ingress to the compressive strength of the semi-infinite solid mix (co... more The effect of chloride ion ingress to the compressive strength of the semi-infinite solid mix (concrete) was determined after the cubes were immersed in the Escravos seawater for 28 days. The average compressive strength of two test cube samples immersed in fresh water was found to be 25.30N/mm2 while the compressive strength for the 1-D concrete cubes immersed in the seawater for 28 days was 25.17N/mm2 and the average load shows a decrease in the compressive strength to 25.05 N/mm2 for the 2-D case respectively.
International Journal of Engineering Research and Applications , 2021
This paper presents the development of an expert system for identifying the critical equipment in... more This paper presents the development of an expert system for identifying the critical equipment in a production plant on which Condition Based Maintenance (CBM) is required for early detection of faults. The system adopts analytical knowledge obtained from mathematical model and utilizes a forward and backward chaining inference scheme. The system was developed using Visual Basic 6.0 (Enterprise Edition) and Microsoft Access Application as front and back end engines respectively while Structured Query Language (SQL) is used for querying and modifying data and managing databases. The verification and validation of the Expert System was carried out using data collected from a Refinery and Petrochemical Company, in Ekpan-Warri, Nigeria which include; equipment types, labor rates, equipment rates, number of failures, average time taken to restore the failed equipment, hourly maintenance cost, purchase cost and the expected life span of the rotating equipment. The performance evaluation results showed that the system capable of identifying the most critical equipment in the plant and that plant availability is increased by scheduling maintenance activities on the identified critical equipment.
Journal of Engineering for Development, 2021
This paper considers a Rectangular (trapezoidal) fuzzy linear programming problem and develops co... more This paper considers a Rectangular (trapezoidal) fuzzy linear programming problem and develops computerized solutions to these problems. The computerized process which is known as the software was programmed using the Microsoft visual basic.Net programming language. The method used is the simplex method which is normally used for solving linear programming problems in crisp environment. In conducting the analysis, the rectangular fuzzy linear programming problems involving fully rectangular (trapezoidal) fuzzy linear programming problem, or just when its objective function variables are fuzzy, or when just its right-hand side constants are fuzzy were considered. Then the results of the manual and software solution were compared on the some bench mark questions. The software shows robustness and accurate.
International Journal of Advanced Research in Science, Engineering and Technology, 2021
experimental study on the effect of cutting parameters (spindle speed, feed rate and depth of cut... more experimental study on the effect of cutting parameters (spindle speed, feed rate and depth of cut) on surface finish of dead mild steel (DMS) is presented. In machining operation, the quality of surface finish is an important factor in many turned workpiece; it either improves or reduces the value of a given machined component. In this study, the specimen was cut into required piece (50x200mm) and turning operation was done using a tungsten carbide tip tool. Graphical method was used to evaluate the effect of these cutting parameters. The result obtained show that feed rate of 0.20mm/min has the most effect on the surface finish. The combination of minimum depth of cut (0.25mm) and maximum constant spindle speed of 700rpm gave a minimum effect on the surface finish with Ra value of 1.1µm. However, spindle speed of 450rpm and depth of cut 0.25mm gave a maximum roughness value of 2.8µm.
International Journal of Computational and Experimental Science and Engineering (IJCESEN) , 2020
The Model equation for the laser heating process is a two dimensional partial differential equati... more The Model equation for the laser heating process is a two dimensional partial differential equation in cylindrical coordinate that is time dependent and involves a source term. This work presents a sequential method in obtaining solution to the laser heat equation using a unique method of solution known as Finite Element Method; a numerical approach as against the analytical method. The approach was used in analyzing the temperature of the irradiated material within the domain of the material. This was done by multiplying the model differential equation by a weighted function and carrying out integration over the domain of the problem to obtain the weak form of the equation. Triangular and rectangular Langrage interpolation functions were used for the spatial discretization and Alpha family of approximation was used for the time approximation. The domain of the problem was discretized manually using eight triangular and 4 rectangular finite element mesh. To obtain more accurate solutions, a programme written with MATLAB software was used to further discretize the domain into smaller finite elements (4000 triangular element mesh and 2000 rectangular element mesh). The results obtained was plotted and compared with literature.
International Journal of Computational and Experimental Science and Engineering (IJCESEN) , 2020
A Layered reservoir system with a constant pressure bottom boundary has immense potential to prod... more A Layered reservoir system with a constant pressure bottom boundary has immense potential to produce oil and gas, using horizontal wells may further increase productivity because it offers a larger surface area for fluid withdrawal. Test analysis in this system is tedious, time consuming and interpretation may be confusing or erroneous. Hence an efficient algorithm is needed to generate accurate pressure response of the wells to facilitate quick and easy analysis and prediction. This paper presents an interactive computer program that computes the dimensionless pressure and dimensionless pressure derivatives of horizontal wells in a two layered reservoir system with a constant pressure boundary. Program's codes and structure of the reservoir model solution were written utilising the exponential integral solution, Gauss Laguerre and Gauss Lagrange numerical methods. The program has features that gave visual interpretation (graphical user interfaces (GUI)) as it computes pressure and derivative values when the interface between the layers is either permeable (crossflow reservoir) or impermeable (no crossflow reservoir). Examples illustrating its use in model identification and well test analysis of layered system with constant pressure boundary are also included in this work. Hence it will serve as a good learning tool because it is user friendly, fast and results have acceptable level of accuracy.
International Journal of Advanced Engineering and Technology., 2018
In this paper, we proposed a new model for predicting the abrasive wear (wear module) in a die du... more In this paper, we proposed a new model for predicting the abrasive wear (wear module) in a die during hot forging processes starting with Shaw's model. The model takes into consideration the deformation energy, sliding velocity and coefficient of friction of the die material and other parameters which was modeled into a differential equation (DE) and can be solved numerically with all necessary boundary conditions and validated against experimental data or through the exact solution method.
NIPES Journal of Science and Technology Research , 2021
This paper presents the development and implementation of a software that calculates the Economic... more This paper presents the development and implementation of a software that calculates the Economic Order Quantity (EOQ) and the ReOrder Point (ROP) for some equipment in a servicing company. Appropriate software tool such as Visual Basic 6.0, Structure Query language and Microsoft Access was used. The software takes into account parameters such as the ordering cost, carrying or holding cost, annual demand, daily demand and lead time. A t-test which falls within the confidence interval of 0.05 was used to ascertain the superiority of the software calculation.
Advances in Engineering Design Technology, 2020
A multi-die forging machine was designed and fabricated successfully with a speed reducer incorpo... more A multi-die forging machine was designed and fabricated successfully with a speed reducer incorporated to reduce the speed with consequent reduction in the noise and vibration level which was identified as the deficiency of previously designed ones with the need to automate the forging machine. Thorough analysis was carried out to ascertain components sizes, while special attention was also given to materials selection. Basic workshop fabrication techniques, such as cutting, turning, milling, drilling, welding were employed in the fabrication of the various parts. The machine was tested using 0.05mm and 0.5mm thick aluminum sheet and a pair of dies to produce flat washers. The test results showed that the machine is capable of producing flat washers of up to 1mm thickness. The multi-die machine can be useful in machine shop and fabrication shops in urban and rural settlements.
Journal of the Nigerian Association of Mathematical Physics, 2020
This research is carried out to facilitate the setting up of a non-ferrous foundry shop in Warri ... more This research is carried out to facilitate the setting up of a non-ferrous foundry shop in Warri Delta state and its environs by evaluating strategic plans on the basis of some feasibility studies. These studies include commercial feasibility, technical feasibility, social economic feasibility as well as financial feasibility of the project. The appraisal conducted, revealed the value of the annual profit to be N2 828 770.00, return on investment as 2.4 and expected payback period of 1year 5 months. It is intended to assist any one operating a small scale foundry in the expansion of the industry, by reviewing the various available processes and to select the most appropriate for the circumstance.
Journal of the Nigerian Association of Mathematical Physics,, 2020
In this work we consider Integer Linear Programming problems (ILP) and develop computerized solut... more In this work we consider Integer Linear Programming problems (ILP) and develop computerized solutions to these problems. The computational process involved using object oriented approach to develop accurate solutions to Integer Linear Programming problems. The solutions were implemented with Microsoft Visual Basic.Net programming language. In conducting the analysis, ILP models involving: All Integer linear programming (AILP), Mixed Integer linear programming (MILP) and Fuzzy Integer linear programming (FILP) were considered. The accuracy of the software was tested with a number of bench mark examples and the results obtained, showed that the software developed was robust to parameter variations and very accurate. Instead obtaining software for the individual ILP presented a single software has being developed to handle the three cases.
The Journal of the Nigerian Institution of Production Engineers , 2019
This paper presents a finite element (FE) solution for the stream function-vorticity relationship... more This paper presents a finite element (FE) solution for the stream function-vorticity relationship for a 2D radial flow through a cylinder by investigating the relationship in an incompressible fluid. The Garlekin finite method was applied and Lagrange quadratic elements were used to represent the cross-section of the cylinder and to assemble the elements of the cylinder. The result shows the velocity at the boundary was zero and increases gradually as it approaches the center of the pipe indicating that the vorticity for an incompressible fluid increases away from the surrounding surface. The FEA solution corroborate the exact solution.
Nigerian Institution of Production Engineers, 2013
This paper presents a software solution to finding the optimal point from the various existing po... more This paper presents a software solution to finding the optimal point from the various existing points of a quadratic linear programming problem. It considered the Wolfe’s method and chikhaoui algorithm. The software was able to solve both the maximization and minimization problem, the result obtained is exactly the same with the manual solution. But with this software the time it takes to solve a particular problem is less.
International Journal of Materials Engineering, 2018
In this paper, a finite element method is formulated to solve the 2 nd order Fick’s model of time... more In this paper, a finite element method is formulated to solve the 2 nd order Fick’s model of time dependent concentration of semi-infinite solid in non-homogeneous materials such as concrete subjected to chloride environment. The method formulates a time dependent problem from the Fick’s model and proceeds to calculate the associated vectors from which the solution can be obtained. The result obtained is highly accurate and when compared with the exact solution and related literature tended fast to the transient state solution.
In this paper, a finite element method is formulated to solve the 2nd order Fick's model of time ... more In this paper, a finite element method is formulated to solve the 2nd order Fick's model of time dependent concentration of semi-infinite solid in non-homogeneous materials such as concrete subjected to chloride environment. The method formulates a time dependent problem from the Fick's model and proceeds to calculate the associated vectors from which the solution can be obtained. The result obtained is highly accurate and when compared with the exact solution and related literature tended fast to the transient state solution.
Geometric programming is an efficient tool for solving nonlinear problems. This work developed an... more Geometric programming is an efficient tool for solving nonlinear problems. This work developed and tested a Visual Basic programming language to solve the unconstrained geometric programming problems. The analysis of the result obtained from the Visual Basic programmed Language showed no significant error, whereas the manually calculated solution contained about 0.5% error. These results show that resource allocations on demand can be altered using the manual calculations and this will as well give a false figure on demand necessary for optimality. By the use of this program, the problems encountered in manual calculations can be eliminated.
A Layered reservoir system with a constant pressure bottom boundary has immense potential to prod... more A Layered reservoir system with a constant pressure bottom boundary has immense potential to produce oil and gas, using horizontal wells may further increase productivity because it offers a larger surface area for fluid withdrawal. Test analysis in this system is tedious, time consuming and interpretation may be confusing or erroneous. Hence an efficient algorithm is needed to generate accurate pressure response of the wells to facilitate quick and easy analysis and prediction. This paper presents an interactive computer program that computes the dimensionless pressure and dimensionless pressure derivatives of horizontal wells in a two layered reservoir system with a constant pressure boundary. Program’s codes and structure of the reservoir model solution were written utilising the exponential integral solution, Gauss Laguerre and Gauss Lagrange numerical methods. The program has features that gave visual interpretation (graphical user interfaces (GUI)) as it computes pressure and ...
Uniport Journal of Engineering and Scientific Research (UJESR), 2022
This paper presents an examination of the wear distribution set up at various points in a die dur... more This paper presents an examination of the wear distribution set up at various points in a die during forging operation by the finite element method. This paper presents the numerical solution to the one-dimensional time dependent differential equation which describes the pressure exerted by forging on a die. In conducting the analysis, the blank was split into a finite number of elements and the Galerkin finite element method was applied to obtain the weighted integral form. The finite element model was then developed and solved to obtain the pressures and stress in an open die forging operation. The results obtained from the present study were compared with the exact solution they were found to be almost identical while the FEM approximates the exact solution for both the quadratic and linear elements graphically. It was observed that the model fits in well with a coefficient of determination (R 2) of 99.8%.
International Journal of Research in Advanced Engineering and Technology, 2018
In this paper, we proposed a new model for predicting the abrasive wear (wear module) in a die du... more In this paper, we proposed a new model for predicting the abrasive wear (wear module) in a die during hot forging processes starting with Shaw's model. The model takes into consideration the deformation energy, sliding velocity and coefficient of friction of the die material and other parameters which was modeled into a differential equation (DE) and can be solved numerically with all necessary boundary conditions and validated against experimental data or through the exact solution method.
The Journal of the Nigerian Institution of Production Engineers , 2022
The effect of chloride ion ingress to the compressive strength of the semi-infinite solid mix (co... more The effect of chloride ion ingress to the compressive strength of the semi-infinite solid mix (concrete) was determined after the cubes were immersed in the Escravos seawater for 28 days. The average compressive strength of two test cube samples immersed in fresh water was found to be 25.30N/mm2 while the compressive strength for the 1-D concrete cubes immersed in the seawater for 28 days was 25.17N/mm2 and the average load shows a decrease in the compressive strength to 25.05 N/mm2 for the 2-D case respectively.
International Journal of Engineering Research and Applications , 2021
This paper presents the development of an expert system for identifying the critical equipment in... more This paper presents the development of an expert system for identifying the critical equipment in a production plant on which Condition Based Maintenance (CBM) is required for early detection of faults. The system adopts analytical knowledge obtained from mathematical model and utilizes a forward and backward chaining inference scheme. The system was developed using Visual Basic 6.0 (Enterprise Edition) and Microsoft Access Application as front and back end engines respectively while Structured Query Language (SQL) is used for querying and modifying data and managing databases. The verification and validation of the Expert System was carried out using data collected from a Refinery and Petrochemical Company, in Ekpan-Warri, Nigeria which include; equipment types, labor rates, equipment rates, number of failures, average time taken to restore the failed equipment, hourly maintenance cost, purchase cost and the expected life span of the rotating equipment. The performance evaluation results showed that the system capable of identifying the most critical equipment in the plant and that plant availability is increased by scheduling maintenance activities on the identified critical equipment.
Journal of Engineering for Development, 2021
This paper considers a Rectangular (trapezoidal) fuzzy linear programming problem and develops co... more This paper considers a Rectangular (trapezoidal) fuzzy linear programming problem and develops computerized solutions to these problems. The computerized process which is known as the software was programmed using the Microsoft visual basic.Net programming language. The method used is the simplex method which is normally used for solving linear programming problems in crisp environment. In conducting the analysis, the rectangular fuzzy linear programming problems involving fully rectangular (trapezoidal) fuzzy linear programming problem, or just when its objective function variables are fuzzy, or when just its right-hand side constants are fuzzy were considered. Then the results of the manual and software solution were compared on the some bench mark questions. The software shows robustness and accurate.
International Journal of Advanced Research in Science, Engineering and Technology, 2021
experimental study on the effect of cutting parameters (spindle speed, feed rate and depth of cut... more experimental study on the effect of cutting parameters (spindle speed, feed rate and depth of cut) on surface finish of dead mild steel (DMS) is presented. In machining operation, the quality of surface finish is an important factor in many turned workpiece; it either improves or reduces the value of a given machined component. In this study, the specimen was cut into required piece (50x200mm) and turning operation was done using a tungsten carbide tip tool. Graphical method was used to evaluate the effect of these cutting parameters. The result obtained show that feed rate of 0.20mm/min has the most effect on the surface finish. The combination of minimum depth of cut (0.25mm) and maximum constant spindle speed of 700rpm gave a minimum effect on the surface finish with Ra value of 1.1µm. However, spindle speed of 450rpm and depth of cut 0.25mm gave a maximum roughness value of 2.8µm.
International Journal of Computational and Experimental Science and Engineering (IJCESEN) , 2020
The Model equation for the laser heating process is a two dimensional partial differential equati... more The Model equation for the laser heating process is a two dimensional partial differential equation in cylindrical coordinate that is time dependent and involves a source term. This work presents a sequential method in obtaining solution to the laser heat equation using a unique method of solution known as Finite Element Method; a numerical approach as against the analytical method. The approach was used in analyzing the temperature of the irradiated material within the domain of the material. This was done by multiplying the model differential equation by a weighted function and carrying out integration over the domain of the problem to obtain the weak form of the equation. Triangular and rectangular Langrage interpolation functions were used for the spatial discretization and Alpha family of approximation was used for the time approximation. The domain of the problem was discretized manually using eight triangular and 4 rectangular finite element mesh. To obtain more accurate solutions, a programme written with MATLAB software was used to further discretize the domain into smaller finite elements (4000 triangular element mesh and 2000 rectangular element mesh). The results obtained was plotted and compared with literature.
International Journal of Computational and Experimental Science and Engineering (IJCESEN) , 2020
A Layered reservoir system with a constant pressure bottom boundary has immense potential to prod... more A Layered reservoir system with a constant pressure bottom boundary has immense potential to produce oil and gas, using horizontal wells may further increase productivity because it offers a larger surface area for fluid withdrawal. Test analysis in this system is tedious, time consuming and interpretation may be confusing or erroneous. Hence an efficient algorithm is needed to generate accurate pressure response of the wells to facilitate quick and easy analysis and prediction. This paper presents an interactive computer program that computes the dimensionless pressure and dimensionless pressure derivatives of horizontal wells in a two layered reservoir system with a constant pressure boundary. Program's codes and structure of the reservoir model solution were written utilising the exponential integral solution, Gauss Laguerre and Gauss Lagrange numerical methods. The program has features that gave visual interpretation (graphical user interfaces (GUI)) as it computes pressure and derivative values when the interface between the layers is either permeable (crossflow reservoir) or impermeable (no crossflow reservoir). Examples illustrating its use in model identification and well test analysis of layered system with constant pressure boundary are also included in this work. Hence it will serve as a good learning tool because it is user friendly, fast and results have acceptable level of accuracy.
International Journal of Advanced Engineering and Technology., 2018
In this paper, we proposed a new model for predicting the abrasive wear (wear module) in a die du... more In this paper, we proposed a new model for predicting the abrasive wear (wear module) in a die during hot forging processes starting with Shaw's model. The model takes into consideration the deformation energy, sliding velocity and coefficient of friction of the die material and other parameters which was modeled into a differential equation (DE) and can be solved numerically with all necessary boundary conditions and validated against experimental data or through the exact solution method.
NIPES Journal of Science and Technology Research , 2021
This paper presents the development and implementation of a software that calculates the Economic... more This paper presents the development and implementation of a software that calculates the Economic Order Quantity (EOQ) and the ReOrder Point (ROP) for some equipment in a servicing company. Appropriate software tool such as Visual Basic 6.0, Structure Query language and Microsoft Access was used. The software takes into account parameters such as the ordering cost, carrying or holding cost, annual demand, daily demand and lead time. A t-test which falls within the confidence interval of 0.05 was used to ascertain the superiority of the software calculation.
Advances in Engineering Design Technology, 2020
A multi-die forging machine was designed and fabricated successfully with a speed reducer incorpo... more A multi-die forging machine was designed and fabricated successfully with a speed reducer incorporated to reduce the speed with consequent reduction in the noise and vibration level which was identified as the deficiency of previously designed ones with the need to automate the forging machine. Thorough analysis was carried out to ascertain components sizes, while special attention was also given to materials selection. Basic workshop fabrication techniques, such as cutting, turning, milling, drilling, welding were employed in the fabrication of the various parts. The machine was tested using 0.05mm and 0.5mm thick aluminum sheet and a pair of dies to produce flat washers. The test results showed that the machine is capable of producing flat washers of up to 1mm thickness. The multi-die machine can be useful in machine shop and fabrication shops in urban and rural settlements.
Journal of the Nigerian Association of Mathematical Physics, 2020
This research is carried out to facilitate the setting up of a non-ferrous foundry shop in Warri ... more This research is carried out to facilitate the setting up of a non-ferrous foundry shop in Warri Delta state and its environs by evaluating strategic plans on the basis of some feasibility studies. These studies include commercial feasibility, technical feasibility, social economic feasibility as well as financial feasibility of the project. The appraisal conducted, revealed the value of the annual profit to be N2 828 770.00, return on investment as 2.4 and expected payback period of 1year 5 months. It is intended to assist any one operating a small scale foundry in the expansion of the industry, by reviewing the various available processes and to select the most appropriate for the circumstance.
Journal of the Nigerian Association of Mathematical Physics,, 2020
In this work we consider Integer Linear Programming problems (ILP) and develop computerized solut... more In this work we consider Integer Linear Programming problems (ILP) and develop computerized solutions to these problems. The computational process involved using object oriented approach to develop accurate solutions to Integer Linear Programming problems. The solutions were implemented with Microsoft Visual Basic.Net programming language. In conducting the analysis, ILP models involving: All Integer linear programming (AILP), Mixed Integer linear programming (MILP) and Fuzzy Integer linear programming (FILP) were considered. The accuracy of the software was tested with a number of bench mark examples and the results obtained, showed that the software developed was robust to parameter variations and very accurate. Instead obtaining software for the individual ILP presented a single software has being developed to handle the three cases.
The Journal of the Nigerian Institution of Production Engineers , 2019
This paper presents a finite element (FE) solution for the stream function-vorticity relationship... more This paper presents a finite element (FE) solution for the stream function-vorticity relationship for a 2D radial flow through a cylinder by investigating the relationship in an incompressible fluid. The Garlekin finite method was applied and Lagrange quadratic elements were used to represent the cross-section of the cylinder and to assemble the elements of the cylinder. The result shows the velocity at the boundary was zero and increases gradually as it approaches the center of the pipe indicating that the vorticity for an incompressible fluid increases away from the surrounding surface. The FEA solution corroborate the exact solution.
Nigerian Institution of Production Engineers, 2013
This paper presents a software solution to finding the optimal point from the various existing po... more This paper presents a software solution to finding the optimal point from the various existing points of a quadratic linear programming problem. It considered the Wolfe’s method and chikhaoui algorithm. The software was able to solve both the maximization and minimization problem, the result obtained is exactly the same with the manual solution. But with this software the time it takes to solve a particular problem is less.
International Journal of Materials Engineering, 2018
In this paper, a finite element method is formulated to solve the 2 nd order Fick’s model of time... more In this paper, a finite element method is formulated to solve the 2 nd order Fick’s model of time dependent concentration of semi-infinite solid in non-homogeneous materials such as concrete subjected to chloride environment. The method formulates a time dependent problem from the Fick’s model and proceeds to calculate the associated vectors from which the solution can be obtained. The result obtained is highly accurate and when compared with the exact solution and related literature tended fast to the transient state solution.
In this paper, a finite element method is formulated to solve the 2nd order Fick's model of time ... more In this paper, a finite element method is formulated to solve the 2nd order Fick's model of time dependent concentration of semi-infinite solid in non-homogeneous materials such as concrete subjected to chloride environment. The method formulates a time dependent problem from the Fick's model and proceeds to calculate the associated vectors from which the solution can be obtained. The result obtained is highly accurate and when compared with the exact solution and related literature tended fast to the transient state solution.
Geometric programming is an efficient tool for solving nonlinear problems. This work developed an... more Geometric programming is an efficient tool for solving nonlinear problems. This work developed and tested a Visual Basic programming language to solve the unconstrained geometric programming problems. The analysis of the result obtained from the Visual Basic programmed Language showed no significant error, whereas the manually calculated solution contained about 0.5% error. These results show that resource allocations on demand can be altered using the manual calculations and this will as well give a false figure on demand necessary for optimality. By the use of this program, the problems encountered in manual calculations can be eliminated.
A Layered reservoir system with a constant pressure bottom boundary has immense potential to prod... more A Layered reservoir system with a constant pressure bottom boundary has immense potential to produce oil and gas, using horizontal wells may further increase productivity because it offers a larger surface area for fluid withdrawal. Test analysis in this system is tedious, time consuming and interpretation may be confusing or erroneous. Hence an efficient algorithm is needed to generate accurate pressure response of the wells to facilitate quick and easy analysis and prediction. This paper presents an interactive computer program that computes the dimensionless pressure and dimensionless pressure derivatives of horizontal wells in a two layered reservoir system with a constant pressure boundary. Program’s codes and structure of the reservoir model solution were written utilising the exponential integral solution, Gauss Laguerre and Gauss Lagrange numerical methods. The program has features that gave visual interpretation (graphical user interfaces (GUI)) as it computes pressure and ...