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Papers by falah abood

International journal of thermofluids, May 1, 2024

International journal of thermofluids, Mar 1, 2024

Maǧallaẗ al-baṣraẗ li-l-ʻulūm al-handasiyyaẗ, Dec 30, 2023

Maǧallaẗ al-baṣraẗ li-l-ʻulūm al-handasiyyaẗ, Dec 30, 2023

Maǧallaẗ al-baṣraẗ li-l-ʻulūm al-handasiyyaẗ, Feb 15, 2024

Al-Qadisiyah Journal for Engineering Sciences, 2011

A numerical study is conducted to investigate the natural convection heat transfer in a two cases... more A numerical study is conducted to investigate the natural convection heat transfer in a two cases of the enclosure ,the first case in a square enclosure of aspect ratio AR=1 and the second case in a right-angle trapezoidal enclosure with aspect ratios AR=0.45 and 0.25 .The enclosure was filled with a liquid saturated porous media .The bottom wall of the cavity was heated with a sinusoidal temperature distribution θ=0.5(1-cos(2πx)) , the vertical wall was cooled at θ=0 and the other walls were adiabatic. The governing equations were solved numerically using finite element software package (FLEXPDE). Flow and heat transfer characteristics are studied for the range of Rayleigh number (100 ≤ Ra ≤ 1000). Streamlines, isotherms and Nusselt numbers were presented. The obtained results show that the heat transfer coefficient increases with increasing of Rayleigh number and aspect ratio. A comparison of the flow field and isotherm field was made with that obtained by (Yasin et al., 2008), which revealed a good agreement.

Journal of Natural Sciences Research, Sep 1, 2019

The investigation of mixed convection inside the semicircle cavity with a fixed cylinder and rota... more The investigation of mixed convection inside the semicircle cavity with a fixed cylinder and rotating has been performed numerically. The bottom wall was maintained to constant heat flux while the curved wall was subjected to ambient and an adiabatic rotating cylinder presence in center cavity. The computation fluid dynamics (CFD)modeling includes numerical solutions of the conservation equation for mass ,momentum and energy, numerical prediction by using ansys FLUENT version 15. The finite volume method were used for solving governing differential equations and the turbulence model was applied SST(K-ω). The results were represented of streamlines, isotherm counters and distribution local Nusselt number at Rayleigh number 2.9×10 8 identical to heat flux q= 290w/m 2 and angular velocity of cylinder ω=0 ,62.8,83.73 and 89.5rad/s clockwise and inclination angle of cavity 0°,30°and 90°.The result shows that the effect of both rotating cylinder ,inclination angle led to enhancement heat transfer.

Basrah journal for engineering science

Thermal steam power plants represent the most important and dependable type for supplying the bas... more Thermal steam power plants represent the most important and dependable type for supplying the base load of electricity around the world. The thermos-economic analysis is an important tool for improving the performance of thermal steam power plants. In the present study, a thermo-economic analysis of a simple steam power plant for different boiler pressure was performed. The analysis comprises the energy, exergy, entropy, economics, and exergy-economic of a simple cycle steam power plant for different boiler pressure. The analysis was performed for a simple steam power plant with the constant output power of 10 MW and the boiler pressure is varied from 10 bar to 100 bar by a step of 10 bar. For each boiler pressure and constant output power, firstly, the fuel mass flow rate, steam flow rate, energy and exergy efficiency, and cost of electricity were calculated. Secondly, entropy generation, exergy destruction, and exergy efficiency for each component were calculated. Finally, exergy ...

Basrah journal for engineering science

The steady-state natural convection from heat sink fin arrays was studied on horizontal, vertical... more The steady-state natural convection from heat sink fin arrays was studied on horizontal, vertical, and inclined heat sinks. Under natural convection, horizontal and vertical heat sinks with parallel fins were tested by considering radiation heat transfer. The experiments were conducted with power inputs ranging from 60 W to 455 W in order to obtain different temperatures. According to the result, when heat input increases, the heat transfer coefficient increases by 38 %, 40.78 % for horizontal and vertical respectively. For horizontal and vertical cases, new correlations have been presented to calculate the Nusselt number influenced by the Rayleigh number. For the incline case, the effect of buoyancy force was studied by changing the inclination angles at 0, 30, 45, and 60 degrees from vertical position. According to comparisons between vertical and incline cases, Nusselt number and heat transfer coefficient were most improved at 30 degrees by 6 %.

Advanced Engineering Forum

The effect of hydraulic fracturing on the permeability and fluid flow of various Iraqi oil storag... more The effect of hydraulic fracturing on the permeability and fluid flow of various Iraqi oil storage cores has been studied. Rumaila, Majnoon, and Zubair fields with different permeability were included in this study. Experiments were performed to determine the breaking pressure of the permeable core. Therefore, numerical and experimental results were compared to test the constant pressure on the impermeable core. Finite Volume Method (EbFVM) corresponding to the Dual Porosity Dual Permeability Model (DPDP) was used. A fractured reservoir in the Iraqi fields was studied for its single-phase fluid flow behavior. To represent the pressure distributions, ANSYS-CFX program was used. The comparisons between the fractured and non-fractured cores has been presented. In this paper, the pressure for permeable cores of Rumaila field has been determined and verified during the experimental and numerical simulation due to its lower fracture pressure. Hence, the required pressure has been determin...

Maǧallaẗ al-baṣraẗ li-l-ʻulūm al-handasiyyaẗ, Apr 24, 2022

University of Thi-Qar journal for engineering sciences, 2013

Basrah Journal for Engineering Science, 2011

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9 September 2021, Sakarya, Turkey, 2022

This study examines the influence of a rotating cylinder on heat transmitted by mixed convection ... more This study examines the influence of a rotating cylinder on heat transmitted by mixed convection in an air-filled square space. The appropriate mathematical models for continuous, incompressible, 2-dimensional, laminar flows with Boussinseq's approach are solved numerically, where constant fluid properties have been used. The most important parameters examined are: the angular velocity (Ω = 0-1000) and the angle of inclination (Ɵ = 0-90 o), the study has been carried out with the Rayleigh number (Ra = 10 4), the Prandtl number (Pr = 0.7). The results show that the streamlines are affected by the angular velocity, where the forced convection becomes dominant at high values of angular velocity. The rotation of the cylinder has an effect on the heat exchange between the walls of the cavity and the fluid. Finally the average Nusselt number is increased with increases of angular velocity and decreases as inclination angles change from horizontal to vertical position. A good agreement has been achieved by comparing the results of this work with other previous work.

A numerical study is conducted to investigate the natural convection heat transfer in a two cases... more A numerical study is conducted to investigate the natural convection heat transfer in a two cases of the enclosure ,the first case in a square enclosure of aspect ratio AR=1 and the second case in a right-angle trapezoidal enclosure with aspect ratios AR=0.45 and 0.25 .The enclosure was filled with a liquid saturated porous media .The bottom wall of the cavity was heated with a sinusoidal temperature distribution θ=0.5(1-cos(2πx)) , the vertical wall was cooled at θ=0 and the other walls were adiabatic. The governing equations were solved numerically using finite element software package (FLEXPDE). Flow and heat transfer characteristics are studied for the range of Rayleigh number (100 ≤ Ra ≤ 1000). Streamlines, isotherms and Nusselt numbers were presented. The obtained results show that the heat transfer coefficient increases with increasing of Rayleigh number and aspect ratio. A comparison of the flow field and isotherm field was made with that obtained by (Yasin et al., 2008), wh...

Arabian Journal of Geosciences, 2021

This paper presents an experimental and numerical study to investigate the hydrodynamics behavior... more This paper presents an experimental and numerical study to investigate the hydrodynamics behavior of the fractured and nonfractured cores. The comparison between the simulated and experiments result is also presented. In this work, the Element Based Finite Volume Method (EbFVM) was used according to the Dual Porosity Dual Permeability Model (DPDP). The behavior of single-phase fluid flow in actual cores was studied for a fractured reservoir in Iraqi fields from Rumaila/Mishrif formation at different depths. ANSYS-CFX, a finite element based simulator was used to represent the pressure and velocity distributions. Therefore, the comparison between a fractured core and a nonfractured core was performed. The representation of fluid flow behavior in a fractured reservoir was presented. It is found that the presence of cracks increase the percentage of improvement in the productivity index to reach about (6.59% and 10.46%) for Rumaila core 14 and Rumaila core 15, respectively.

Advances in Material Sciences and Engineering, 2019

The increasing demand for crude oil makes it necessary to consider factors that increase the prod... more The increasing demand for crude oil makes it necessary to consider factors that increase the productivity of the reservoirs. One of these factors is fracture that is found naturally or produced hydraulically, where the fracture improves reservoir flow and connectivity. The most common characteristics of naturally fractured reservoirs (NFRs) are the fractures directionality. In this review, the most important characteristics and parameters that affect the fracture have been explained. In addition, the simulations of the fracture phenomena have been cleared. The difference among the models that solved the fracture problems are; discrete fracture model (DFM), dual porosity model (DPM), embedded discrete fracture model (EDFM), and hybrid models DP and EDFM (DP + EDFM) are shown with characteristics of each model. The present study focused on the shape factor and the direction of the fracture to show their effects on the performance of the petroleum reservoir. In addition, the review of general important parameters for the fractured reservoirs has been presented.

Basrah journal for engineering science, 2019

The studying of fluid flow throughout fracture in the reservoir is one of the most vital subjects... more The studying of fluid flow throughout fracture in the reservoir is one of the most vital subjects attracted much attention from engineers and geologists. In the present paper, the Dual Porosity-Dual Permeability (DPDP) model has been applied to represent the fluid flow within the fractured reservoirs. This work aimed to demonstrate the utility of the fractures in the petroleum reservoir and how could be used the positive effect of these fractures on the productivity as well. The productivity of single-phase fluid flow within the single horizontal fracture, multi horizontal fractures, and inclined fracture with different orientations (20o, 30o, 45o, and 70o) have been implemented by using ANSYS-CFX program and compared with the productivity of conventional (without fractures) reservoirs. In addition to, visualize the velocity streamlines within fracture and matrix zones for the DPDP model. To verify this work the comparison has been made with published paper, which studies the fluid ...

International Journal of Thermal Sciences, 2019

The transfer of heat by the fins is influenced by the change of the direction of the fins. This p... more The transfer of heat by the fins is influenced by the change of the direction of the fins. This paper investigates study the effect of the direction of longitudinal fins on a three-dimensional convection heat transfer in a rectangular channel and also study the effect of the lateral and longitudinal inclination of the rectangular channel. The Grashof range from 5 × 10 8 to 10 9 , Reynolds from 1000 to 2300 and Prandtl 0.71. The bottom surface of the channel is exposed to constant heat flux, while other walls are isolated. Two cases are investigated. In case one, measurements were conducted for a lateral inclination of the channel, with a range of α = 0°,30°,60°, and 90°. Case two studied the longitudinal inclination of the channel, with the lateral inclination angle fixed at α = 90°a nd the longitudinal inclination angle Ө = 0°, 30°, 60°, and 70°. The dimensionless of fin height was Hf/H = 0.6, and the fin spacing was S/H = 0.17. The experimental results show that the coefficient of the heat transfer for lateral inclination (α = 0°) was greater than that for a sideways orientation (α = 90°). Additionally, the average coefficient of heat transfer for both the lateral and longitudinal inclination case is increased with the longitudinal inclination angle. The empirical equations are obtained based on the experimental results. These equations correlated the Nusselt number as a dependent variable of the orientations angles, Reynolds number, and the Grashof number, these equations are consistent with experimental results.

Journal of Mechanical Engineering Research, 2021

The behavior of fluid flow has been studied during the different flow media over the past decades... more The behavior of fluid flow has been studied during the different flow media over the past decades. In addition, the behavior of the flow of fluid through porous media has garnered much research interest. This paper sheds light on fissured rocks of oil reservoir media (as one of the porous media domain), and the effect of these fissured on fluid flow. In this article, the Finite Volume Method (FVM) has been used to visualize the behavior of single-phase fluid flow in an actual core according to the dualporosity dual permeability model. The study was conducted in two parts, the first was the image processing for one of the real oil reservoir fractured rock images, where the image was processed and simulated by ANSYSCFX software, and the results showed a complete visualizing of the fluid behavior during this domain. As for the other side, a simulation of a real reservoir rock belonging to the Al-Nour field in Iraq / Misan was made. The X-ray Computed Tomography (CT) scan has been used ...

International journal of thermofluids, May 1, 2024

International journal of thermofluids, Mar 1, 2024

Maǧallaẗ al-baṣraẗ li-l-ʻulūm al-handasiyyaẗ, Dec 30, 2023

Maǧallaẗ al-baṣraẗ li-l-ʻulūm al-handasiyyaẗ, Dec 30, 2023

Maǧallaẗ al-baṣraẗ li-l-ʻulūm al-handasiyyaẗ, Feb 15, 2024

Al-Qadisiyah Journal for Engineering Sciences, 2011

A numerical study is conducted to investigate the natural convection heat transfer in a two cases... more A numerical study is conducted to investigate the natural convection heat transfer in a two cases of the enclosure ,the first case in a square enclosure of aspect ratio AR=1 and the second case in a right-angle trapezoidal enclosure with aspect ratios AR=0.45 and 0.25 .The enclosure was filled with a liquid saturated porous media .The bottom wall of the cavity was heated with a sinusoidal temperature distribution θ=0.5(1-cos(2πx)) , the vertical wall was cooled at θ=0 and the other walls were adiabatic. The governing equations were solved numerically using finite element software package (FLEXPDE). Flow and heat transfer characteristics are studied for the range of Rayleigh number (100 ≤ Ra ≤ 1000). Streamlines, isotherms and Nusselt numbers were presented. The obtained results show that the heat transfer coefficient increases with increasing of Rayleigh number and aspect ratio. A comparison of the flow field and isotherm field was made with that obtained by (Yasin et al., 2008), which revealed a good agreement.

Journal of Natural Sciences Research, Sep 1, 2019

The investigation of mixed convection inside the semicircle cavity with a fixed cylinder and rota... more The investigation of mixed convection inside the semicircle cavity with a fixed cylinder and rotating has been performed numerically. The bottom wall was maintained to constant heat flux while the curved wall was subjected to ambient and an adiabatic rotating cylinder presence in center cavity. The computation fluid dynamics (CFD)modeling includes numerical solutions of the conservation equation for mass ,momentum and energy, numerical prediction by using ansys FLUENT version 15. The finite volume method were used for solving governing differential equations and the turbulence model was applied SST(K-ω). The results were represented of streamlines, isotherm counters and distribution local Nusselt number at Rayleigh number 2.9×10 8 identical to heat flux q= 290w/m 2 and angular velocity of cylinder ω=0 ,62.8,83.73 and 89.5rad/s clockwise and inclination angle of cavity 0°,30°and 90°.The result shows that the effect of both rotating cylinder ,inclination angle led to enhancement heat transfer.

Basrah journal for engineering science

Thermal steam power plants represent the most important and dependable type for supplying the bas... more Thermal steam power plants represent the most important and dependable type for supplying the base load of electricity around the world. The thermos-economic analysis is an important tool for improving the performance of thermal steam power plants. In the present study, a thermo-economic analysis of a simple steam power plant for different boiler pressure was performed. The analysis comprises the energy, exergy, entropy, economics, and exergy-economic of a simple cycle steam power plant for different boiler pressure. The analysis was performed for a simple steam power plant with the constant output power of 10 MW and the boiler pressure is varied from 10 bar to 100 bar by a step of 10 bar. For each boiler pressure and constant output power, firstly, the fuel mass flow rate, steam flow rate, energy and exergy efficiency, and cost of electricity were calculated. Secondly, entropy generation, exergy destruction, and exergy efficiency for each component were calculated. Finally, exergy ...

Basrah journal for engineering science

The steady-state natural convection from heat sink fin arrays was studied on horizontal, vertical... more The steady-state natural convection from heat sink fin arrays was studied on horizontal, vertical, and inclined heat sinks. Under natural convection, horizontal and vertical heat sinks with parallel fins were tested by considering radiation heat transfer. The experiments were conducted with power inputs ranging from 60 W to 455 W in order to obtain different temperatures. According to the result, when heat input increases, the heat transfer coefficient increases by 38 %, 40.78 % for horizontal and vertical respectively. For horizontal and vertical cases, new correlations have been presented to calculate the Nusselt number influenced by the Rayleigh number. For the incline case, the effect of buoyancy force was studied by changing the inclination angles at 0, 30, 45, and 60 degrees from vertical position. According to comparisons between vertical and incline cases, Nusselt number and heat transfer coefficient were most improved at 30 degrees by 6 %.

Advanced Engineering Forum

The effect of hydraulic fracturing on the permeability and fluid flow of various Iraqi oil storag... more The effect of hydraulic fracturing on the permeability and fluid flow of various Iraqi oil storage cores has been studied. Rumaila, Majnoon, and Zubair fields with different permeability were included in this study. Experiments were performed to determine the breaking pressure of the permeable core. Therefore, numerical and experimental results were compared to test the constant pressure on the impermeable core. Finite Volume Method (EbFVM) corresponding to the Dual Porosity Dual Permeability Model (DPDP) was used. A fractured reservoir in the Iraqi fields was studied for its single-phase fluid flow behavior. To represent the pressure distributions, ANSYS-CFX program was used. The comparisons between the fractured and non-fractured cores has been presented. In this paper, the pressure for permeable cores of Rumaila field has been determined and verified during the experimental and numerical simulation due to its lower fracture pressure. Hence, the required pressure has been determin...

Maǧallaẗ al-baṣraẗ li-l-ʻulūm al-handasiyyaẗ, Apr 24, 2022

University of Thi-Qar journal for engineering sciences, 2013

Basrah Journal for Engineering Science, 2011

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9 September 2021, Sakarya, Turkey, 2022

This study examines the influence of a rotating cylinder on heat transmitted by mixed convection ... more This study examines the influence of a rotating cylinder on heat transmitted by mixed convection in an air-filled square space. The appropriate mathematical models for continuous, incompressible, 2-dimensional, laminar flows with Boussinseq's approach are solved numerically, where constant fluid properties have been used. The most important parameters examined are: the angular velocity (Ω = 0-1000) and the angle of inclination (Ɵ = 0-90 o), the study has been carried out with the Rayleigh number (Ra = 10 4), the Prandtl number (Pr = 0.7). The results show that the streamlines are affected by the angular velocity, where the forced convection becomes dominant at high values of angular velocity. The rotation of the cylinder has an effect on the heat exchange between the walls of the cavity and the fluid. Finally the average Nusselt number is increased with increases of angular velocity and decreases as inclination angles change from horizontal to vertical position. A good agreement has been achieved by comparing the results of this work with other previous work.

A numerical study is conducted to investigate the natural convection heat transfer in a two cases... more A numerical study is conducted to investigate the natural convection heat transfer in a two cases of the enclosure ,the first case in a square enclosure of aspect ratio AR=1 and the second case in a right-angle trapezoidal enclosure with aspect ratios AR=0.45 and 0.25 .The enclosure was filled with a liquid saturated porous media .The bottom wall of the cavity was heated with a sinusoidal temperature distribution θ=0.5(1-cos(2πx)) , the vertical wall was cooled at θ=0 and the other walls were adiabatic. The governing equations were solved numerically using finite element software package (FLEXPDE). Flow and heat transfer characteristics are studied for the range of Rayleigh number (100 ≤ Ra ≤ 1000). Streamlines, isotherms and Nusselt numbers were presented. The obtained results show that the heat transfer coefficient increases with increasing of Rayleigh number and aspect ratio. A comparison of the flow field and isotherm field was made with that obtained by (Yasin et al., 2008), wh...

Arabian Journal of Geosciences, 2021

This paper presents an experimental and numerical study to investigate the hydrodynamics behavior... more This paper presents an experimental and numerical study to investigate the hydrodynamics behavior of the fractured and nonfractured cores. The comparison between the simulated and experiments result is also presented. In this work, the Element Based Finite Volume Method (EbFVM) was used according to the Dual Porosity Dual Permeability Model (DPDP). The behavior of single-phase fluid flow in actual cores was studied for a fractured reservoir in Iraqi fields from Rumaila/Mishrif formation at different depths. ANSYS-CFX, a finite element based simulator was used to represent the pressure and velocity distributions. Therefore, the comparison between a fractured core and a nonfractured core was performed. The representation of fluid flow behavior in a fractured reservoir was presented. It is found that the presence of cracks increase the percentage of improvement in the productivity index to reach about (6.59% and 10.46%) for Rumaila core 14 and Rumaila core 15, respectively.

Advances in Material Sciences and Engineering, 2019

The increasing demand for crude oil makes it necessary to consider factors that increase the prod... more The increasing demand for crude oil makes it necessary to consider factors that increase the productivity of the reservoirs. One of these factors is fracture that is found naturally or produced hydraulically, where the fracture improves reservoir flow and connectivity. The most common characteristics of naturally fractured reservoirs (NFRs) are the fractures directionality. In this review, the most important characteristics and parameters that affect the fracture have been explained. In addition, the simulations of the fracture phenomena have been cleared. The difference among the models that solved the fracture problems are; discrete fracture model (DFM), dual porosity model (DPM), embedded discrete fracture model (EDFM), and hybrid models DP and EDFM (DP + EDFM) are shown with characteristics of each model. The present study focused on the shape factor and the direction of the fracture to show their effects on the performance of the petroleum reservoir. In addition, the review of general important parameters for the fractured reservoirs has been presented.

Basrah journal for engineering science, 2019

The studying of fluid flow throughout fracture in the reservoir is one of the most vital subjects... more The studying of fluid flow throughout fracture in the reservoir is one of the most vital subjects attracted much attention from engineers and geologists. In the present paper, the Dual Porosity-Dual Permeability (DPDP) model has been applied to represent the fluid flow within the fractured reservoirs. This work aimed to demonstrate the utility of the fractures in the petroleum reservoir and how could be used the positive effect of these fractures on the productivity as well. The productivity of single-phase fluid flow within the single horizontal fracture, multi horizontal fractures, and inclined fracture with different orientations (20o, 30o, 45o, and 70o) have been implemented by using ANSYS-CFX program and compared with the productivity of conventional (without fractures) reservoirs. In addition to, visualize the velocity streamlines within fracture and matrix zones for the DPDP model. To verify this work the comparison has been made with published paper, which studies the fluid ...

International Journal of Thermal Sciences, 2019

The transfer of heat by the fins is influenced by the change of the direction of the fins. This p... more The transfer of heat by the fins is influenced by the change of the direction of the fins. This paper investigates study the effect of the direction of longitudinal fins on a three-dimensional convection heat transfer in a rectangular channel and also study the effect of the lateral and longitudinal inclination of the rectangular channel. The Grashof range from 5 × 10 8 to 10 9 , Reynolds from 1000 to 2300 and Prandtl 0.71. The bottom surface of the channel is exposed to constant heat flux, while other walls are isolated. Two cases are investigated. In case one, measurements were conducted for a lateral inclination of the channel, with a range of α = 0°,30°,60°, and 90°. Case two studied the longitudinal inclination of the channel, with the lateral inclination angle fixed at α = 90°a nd the longitudinal inclination angle Ө = 0°, 30°, 60°, and 70°. The dimensionless of fin height was Hf/H = 0.6, and the fin spacing was S/H = 0.17. The experimental results show that the coefficient of the heat transfer for lateral inclination (α = 0°) was greater than that for a sideways orientation (α = 90°). Additionally, the average coefficient of heat transfer for both the lateral and longitudinal inclination case is increased with the longitudinal inclination angle. The empirical equations are obtained based on the experimental results. These equations correlated the Nusselt number as a dependent variable of the orientations angles, Reynolds number, and the Grashof number, these equations are consistent with experimental results.

Journal of Mechanical Engineering Research, 2021

The behavior of fluid flow has been studied during the different flow media over the past decades... more The behavior of fluid flow has been studied during the different flow media over the past decades. In addition, the behavior of the flow of fluid through porous media has garnered much research interest. This paper sheds light on fissured rocks of oil reservoir media (as one of the porous media domain), and the effect of these fissured on fluid flow. In this article, the Finite Volume Method (FVM) has been used to visualize the behavior of single-phase fluid flow in an actual core according to the dualporosity dual permeability model. The study was conducted in two parts, the first was the image processing for one of the real oil reservoir fractured rock images, where the image was processed and simulated by ANSYSCFX software, and the results showed a complete visualizing of the fluid behavior during this domain. As for the other side, a simulation of a real reservoir rock belonging to the Al-Nour field in Iraq / Misan was made. The X-ray Computed Tomography (CT) scan has been used ...