ramin mansouri - Academia.edu (original) (raw)
Papers by ramin mansouri
2018 Conference, July 28-August 2, 2018, Vancouver, British Columbia, 2018
Abstract The Pressure Irrigation Networks is one of the major requirements in urban and regional ... more Abstract The Pressure Irrigation Networks is one of the major requirements in urban and regional economic development. For any agency dealing with the design of the water distribution network, an economic design will be an objective. In this research, Developed Central Force Optimization (DCFO) was used to optimize Ismail Abad water Distribution network. This network that is pressurized network and includes 19 pipes and nodes 18. Optimization of the network has been evaluated by developing an optimization model based on DCFO algorithm in MATLAB and the dynamic connection with EPANET software for network hydraulic calculation. Conclusions show DCFO runtime is less than mixed integer linear programming (MILP) method that provides absolute optimum. While optimization of DCFO (737,924 $) is 1.61% more than the absolute optimum that determined by the MILP method. The Frep parameter started at a value of 0.5 and was incremented by 0.005 whenever the absolute value of the difference between 5th array element and the average value of elements 3, 4, and 5 differed by less than 0.0005 (fitness tolerance). This method has been used to place 42 probes (Np = 42) in decision space and their initial acceleration vectors have been set to zero.
Iran University of Science & Technology, Jul 15, 2017
Water science and engineering, Dec 1, 2017
Scientific Journal of Pure and Applied Sciences, Jun 30, 2014
Collection of surface and subsurface waters in small seasonal rivers is very crucial, particularl... more Collection of surface and subsurface waters in small seasonal rivers is very crucial, particularly in dry seasons. In this study a kind of intakes introduced, the system acts as a river drainage network. In this study an experimental model of the subsurface intake was constructed and the effective parameters such as upstream discharge, installation depth, and drains interval were evaluated. The results showed that the water diversion mostly influenced by the upstream flow rate. The very small drain interval caused the discharge of each drain to be reduced. It was also revealed that the total drained discharge in the very transmitting media was mostly controlled with the number of drain and drain interval did have a marginal effect. Finally the regression equations were established to estimate the discharge of each drain based on dimensional analysis, which facilitate the design of this structure. Keyword: subsurface intake, porous media, drainage system, design criteria
Scientific Journal of Pure and Applied Sciences, 2014
Iran, has caused most of the water used and as much as possible to avoid losses. One of the impor... more Iran, has caused most of the water used and as much as possible to avoid losses. One of the important parameters in agriculture is water distribution uniformity coefficient (CU) in sprinkler irrigation. CU amount of water sprinkler operating depends on different pressure heads (P), riser height (RH), distance between sprinklers on lateral pipes (Sl) and the distance between lateral pipes (Sm). The best combination of the above parameters for maximum CU, is still unknown for applicators. In this research, CU quantities of zb model sprinkler (made in Iran) were measured at Hashemabad cotton research station of Gorgan under 3 different pressure heads (2.5, 3 and 3.5 atm), 2 riser heads (60 and 100 cm) and 7 sprinkler (Sl×Sm including 9×12, 9×15, 12×12, 15×12, 12×18, 15×15, 15×18m) arrangements. By using differential evolution algorithm (DE), CU equation was optimized and the best optimized coefficients obtained. In this algorithm, the coefficients F and CR equal to 2 and 0.5, respectiv...
Water is one of the biggest challenges of this century in the very near future, which may be the ... more Water is one of the biggest challenges of this century in the very near future, which may be the source of many of the world’s positive and negative developments. Increasing population and a shortage of water resources necessitates the need for proper management of reservoirs. On the other hand in the management of water resources in addition to the issues we face at the same time exploiting reservoirs with hydraulic and water resources were important and both hydraulic and hydrologic modeling flow conditions must be considered together. In this study, three dams and two water transfer tunnels were used for transferring water from Yalan dam to Gokan dam (Yalan-Pashandegan-Gokan Water Transfer (YPGWT) Project). For YPGWT Project simulating and optimizing, at first dynamic programming (forward-moving) was developed, and after solving it, the best diameter and dam height for optimization of water transfer system was determined. Since the water flow through the tunnel is under pressure,...
In this research, the differential evolution algorithm (DE) is used to optimize Ismail Abad water... more In this research, the differential evolution algorithm (DE) is used to optimize Ismail Abad water distribution network. This network is a pressurized network and includes 18 pipes and 19 nodes. Optimization of the network has been conducted by developing an optimization model based on the DE algorithm in MATLAB by establishing a dynamic connection with EPANET software for hydraulic calculation of the network. The developed model was run for decision variables including the scale factor (F), the crossover constant (Cr), initial population (N) and the number of generations (G) and their values for the best adeptness of DE algorithm were identified as 0.6, 0.5, 100 and 200, respectively. The optimal solution was compared with the classical empirical method and results showed that implementation cost of the designed network by the DE algorithm was 10.66% lower than that by the classical empirical method.
Scientific Journal of Pure and Applied Sciences, 2014
The study of hydrodynamic canals is the first step in canals design, sediment transport, erosion,... more The study of hydrodynamic canals is the first step in canals design, sediment transport, erosion, dissemination of pollution and other phenomena related to canals. When in canals, depth or flow rate is suddenly changed, the sharp wave is generated. When the position and characteristics of the sharp wave remain constant, after the steady flow, it is called the static-sharp wave. So generated jump hydraulic and sharp waves in transitions due to cross-obstacle in flow path at supercritical flows are classified as the static sharp waves. Since the equations governing the dynamics of sharp waves are the same as the flow equation in shallow-water, this paper uses linear solve for the equations governing shallow-water and specifying boundary conditions in shallow-water with the static wave and by using Taylor series, an equation for the bottom and two equations based on kinematic and dynamic boundary for the surface boundary were extracted. Also considering the frequency of the surface wav...
Water science and engineering, 2017
سرریز مدور قائم با شکلهای مختلف ورودی در شرایطی که محدودیت مکانی برای ساخت انواع دیگر سرریز وجود... more سرریز مدور قائم با شکلهای مختلف ورودی در شرایطی که محدودیت مکانی برای ساخت انواع دیگر سرریز وجود داشته باشد، بسیار مؤثر عمل میکند. هیدرولیک جریان در سرریز مدور قائم به سه دسته آزاد، روزنهای و تحت فشار تقسیم میشود. در این تحقیق خصوصیات هیدرولیکی در سرریز مدور قائم به-صورت عددی مورد بررسی قرار گرفته است. خصوصیات هیدرولیکی مانند بررسی پروفیل رویی و زیرین سرریز مدور قائم ساده، بررسی رابطه دبی با تراز آب بالادست و بررسی ضریب دبی جریان در حالت مدل-سازی و آزمایشگاهی مورد بررسی قرار گرفت. نتایج عددی در شرایط، شبکه محاسباتی شامل 10602 گره، مدل آشفته دو معادلهای k- استاندارد و تابع دیواره استاندارد بهترین نتایج را برای مدلسازی جریان آب در سرریز مدور قائم را ارائه میدهد. در بررسی پروفیل رویه و زیرین جت ریزشی تطابق بسیار خوبی بین نتایج عددی و نتایج عددی دیده شد. همچنین بین نتایج تراز آب بر روی تاج سرریز و دبی سرریز شده مشخص شد در ترازهای آب کم، نتایج در مدلسازی عددی تقریبا با نتایج عددی تطابق دارد؛ اما با افزایش تراز آب بر روی تاج سرریز اختلاف بین دبی عددی و آزمایشگاهی زیاد میگردد. د...
Drops are hydraulic structures that are commonly used in irrigation and waste water collection ne... more Drops are hydraulic structures that are commonly used in irrigation and waste water collection networks. A vertical drop balances the elevation difference between the channel slope and ground slope. Earlier investigations on this structure have mainly focused on experimental studies of the hydraulic characteristics. In this paper, the hydraulic characteristics of vertical drops with inverse apron have been studied numerically with used of Fuent software to solve the finite volume method. The volume of fluid (volume of fluid) was used for modeling the free surface. Flow characteristics such as downstream depth, pool depth and energy loss were calculated and compared with the experimental values. Different turbulent models and grids have been studied. The numerical results with a 52745-node grid, 1.5 meter downstream channel length, standard k-ε turbulence model and standard wall function showed the best agreement and the numerical downstream depth, pool depth and energy loss followed the theoretical equations very well. Finally the numerical impact velocities were compared to empirical equation for different cases and showed little discrepancy, therefore velocity characteristics of falling jet were calculated.
Journal of Water Supply: Research and Technology - Aqua, 2017
Water Resources Management, 2016
Advances in Intelligent Systems and Computing, 2015
Nowadays, due to increasing population and water shortage and competition for its consumption, es... more Nowadays, due to increasing population and water shortage and competition for its consumption, especially in the agricultural that is the largest consumer of water, proper and suitable utilization and optimal use of water resources is essential. One of the important parameters in agriculture field is water distribution network. In this research, differential evolution algorithm (DE) was used to optimize Ismail Abad water supply network. This network that is pressurized network and includes 19 pipes and nodes 18. Optimization of the network has been evaluated by developing an optimization model based on DE algorithm in MATLAB and the dynamic connection with EPANET software for network hydraulic calculation. The developing model was run for the scale factor (F), the crossover constant (Cr), initial population (N) and the number of generations (G) and was identified best adeptness for DE algorithm is 0.6, 0.5, 100 and 200 for F and Cr, N and G, respectively. The optimal solution was compared with the classical empirical method and results showed that Implementation cost of the network by DE algorithm 10.66% lower than the classical empirical method.
Journal of Water Resource and Protection, 2015
In arid and semi-arid regions, collection of surface and subsurface waters in small seasonal rive... more In arid and semi-arid regions, collection of surface and subsurface waters in small seasonal rivers is very crucial, particularly in dry seasons. The cost of construction and maintenance of the classical water intakes makes them inappropriate for such rivers. In this study a rather new method to divert surface and subsurface water is experimentally evaluated. In this kind of intakes, a couple of trenches are excavated and the drain pipes are installed in them and then filled with very porous materials. Indeed the system acts as a river drainage network. This method not only reduces the construction and maintenance costs but also minimize the disturbance of river topology and morphology. Therefore this intake is also suitable for rivers with high sedimentary loads. In this study an experimental model of the subsurface intake was constructed and the effective parameters such as water head, installation depth, drains interval, porous media length, and drains arrangement (10, 20, 30, 40, 50, 60, and 150 cm) was evaluated. The results showed that the drains flow rate changes along the porous media depending on the hydraulic head above each drain so that in constant up-and downstream head, the minimum discharge was observed in the central drain. The assessment of different drains arrangement indicated that bi-level installation was superior to mono-level drains. Finally the regression equations were established to estimate the discharge of each drain based on dimensional analysis, which facilitate the design of this structure .
Progress in Computational Fluid Dynamics, An International Journal, 2014
ABSTRACT The complex flow over three vertical drops (horizontal apron, adverse apron, horizontal ... more ABSTRACT The complex flow over three vertical drops (horizontal apron, adverse apron, horizontal apron with an end sill) were studied numerically and compared to experiments and empirical functions. In addition to flow depth, energy loss, and free-surface profiles, detailed velocity, pressure and shear stress distribution, which are hard to be measured experimentally, were investigated. The 2D numerical results on a 57,512-node grid, using standard k-ε turbulence model and standard wall function showed the best agreement with experimental results. The energy loss in the drop with an end sill was higher than the adverse apron drop and the latter more than the horizontal apron drop. The numerical length and velocity scales confirmed the experimental similarity profiles. However, due to dissipative nature of the turbulence model, the velocity gradient in the shear layer was numerically dispersed particularly near the pool end. The stagnation pressure and shear stress were computed numerically for the drops. The maximum stagnation pressure and shear stress occurred in the horizontal apron drop.
2018 Conference, July 28-August 2, 2018, Vancouver, British Columbia, 2018
Abstract The Pressure Irrigation Networks is one of the major requirements in urban and regional ... more Abstract The Pressure Irrigation Networks is one of the major requirements in urban and regional economic development. For any agency dealing with the design of the water distribution network, an economic design will be an objective. In this research, Developed Central Force Optimization (DCFO) was used to optimize Ismail Abad water Distribution network. This network that is pressurized network and includes 19 pipes and nodes 18. Optimization of the network has been evaluated by developing an optimization model based on DCFO algorithm in MATLAB and the dynamic connection with EPANET software for network hydraulic calculation. Conclusions show DCFO runtime is less than mixed integer linear programming (MILP) method that provides absolute optimum. While optimization of DCFO (737,924 $) is 1.61% more than the absolute optimum that determined by the MILP method. The Frep parameter started at a value of 0.5 and was incremented by 0.005 whenever the absolute value of the difference between 5th array element and the average value of elements 3, 4, and 5 differed by less than 0.0005 (fitness tolerance). This method has been used to place 42 probes (Np = 42) in decision space and their initial acceleration vectors have been set to zero.
Iran University of Science & Technology, Jul 15, 2017
Water science and engineering, Dec 1, 2017
Scientific Journal of Pure and Applied Sciences, Jun 30, 2014
Collection of surface and subsurface waters in small seasonal rivers is very crucial, particularl... more Collection of surface and subsurface waters in small seasonal rivers is very crucial, particularly in dry seasons. In this study a kind of intakes introduced, the system acts as a river drainage network. In this study an experimental model of the subsurface intake was constructed and the effective parameters such as upstream discharge, installation depth, and drains interval were evaluated. The results showed that the water diversion mostly influenced by the upstream flow rate. The very small drain interval caused the discharge of each drain to be reduced. It was also revealed that the total drained discharge in the very transmitting media was mostly controlled with the number of drain and drain interval did have a marginal effect. Finally the regression equations were established to estimate the discharge of each drain based on dimensional analysis, which facilitate the design of this structure. Keyword: subsurface intake, porous media, drainage system, design criteria
Scientific Journal of Pure and Applied Sciences, 2014
Iran, has caused most of the water used and as much as possible to avoid losses. One of the impor... more Iran, has caused most of the water used and as much as possible to avoid losses. One of the important parameters in agriculture is water distribution uniformity coefficient (CU) in sprinkler irrigation. CU amount of water sprinkler operating depends on different pressure heads (P), riser height (RH), distance between sprinklers on lateral pipes (Sl) and the distance between lateral pipes (Sm). The best combination of the above parameters for maximum CU, is still unknown for applicators. In this research, CU quantities of zb model sprinkler (made in Iran) were measured at Hashemabad cotton research station of Gorgan under 3 different pressure heads (2.5, 3 and 3.5 atm), 2 riser heads (60 and 100 cm) and 7 sprinkler (Sl×Sm including 9×12, 9×15, 12×12, 15×12, 12×18, 15×15, 15×18m) arrangements. By using differential evolution algorithm (DE), CU equation was optimized and the best optimized coefficients obtained. In this algorithm, the coefficients F and CR equal to 2 and 0.5, respectiv...
Water is one of the biggest challenges of this century in the very near future, which may be the ... more Water is one of the biggest challenges of this century in the very near future, which may be the source of many of the world’s positive and negative developments. Increasing population and a shortage of water resources necessitates the need for proper management of reservoirs. On the other hand in the management of water resources in addition to the issues we face at the same time exploiting reservoirs with hydraulic and water resources were important and both hydraulic and hydrologic modeling flow conditions must be considered together. In this study, three dams and two water transfer tunnels were used for transferring water from Yalan dam to Gokan dam (Yalan-Pashandegan-Gokan Water Transfer (YPGWT) Project). For YPGWT Project simulating and optimizing, at first dynamic programming (forward-moving) was developed, and after solving it, the best diameter and dam height for optimization of water transfer system was determined. Since the water flow through the tunnel is under pressure,...
In this research, the differential evolution algorithm (DE) is used to optimize Ismail Abad water... more In this research, the differential evolution algorithm (DE) is used to optimize Ismail Abad water distribution network. This network is a pressurized network and includes 18 pipes and 19 nodes. Optimization of the network has been conducted by developing an optimization model based on the DE algorithm in MATLAB by establishing a dynamic connection with EPANET software for hydraulic calculation of the network. The developed model was run for decision variables including the scale factor (F), the crossover constant (Cr), initial population (N) and the number of generations (G) and their values for the best adeptness of DE algorithm were identified as 0.6, 0.5, 100 and 200, respectively. The optimal solution was compared with the classical empirical method and results showed that implementation cost of the designed network by the DE algorithm was 10.66% lower than that by the classical empirical method.
Scientific Journal of Pure and Applied Sciences, 2014
The study of hydrodynamic canals is the first step in canals design, sediment transport, erosion,... more The study of hydrodynamic canals is the first step in canals design, sediment transport, erosion, dissemination of pollution and other phenomena related to canals. When in canals, depth or flow rate is suddenly changed, the sharp wave is generated. When the position and characteristics of the sharp wave remain constant, after the steady flow, it is called the static-sharp wave. So generated jump hydraulic and sharp waves in transitions due to cross-obstacle in flow path at supercritical flows are classified as the static sharp waves. Since the equations governing the dynamics of sharp waves are the same as the flow equation in shallow-water, this paper uses linear solve for the equations governing shallow-water and specifying boundary conditions in shallow-water with the static wave and by using Taylor series, an equation for the bottom and two equations based on kinematic and dynamic boundary for the surface boundary were extracted. Also considering the frequency of the surface wav...
Water science and engineering, 2017
سرریز مدور قائم با شکلهای مختلف ورودی در شرایطی که محدودیت مکانی برای ساخت انواع دیگر سرریز وجود... more سرریز مدور قائم با شکلهای مختلف ورودی در شرایطی که محدودیت مکانی برای ساخت انواع دیگر سرریز وجود داشته باشد، بسیار مؤثر عمل میکند. هیدرولیک جریان در سرریز مدور قائم به سه دسته آزاد، روزنهای و تحت فشار تقسیم میشود. در این تحقیق خصوصیات هیدرولیکی در سرریز مدور قائم به-صورت عددی مورد بررسی قرار گرفته است. خصوصیات هیدرولیکی مانند بررسی پروفیل رویی و زیرین سرریز مدور قائم ساده، بررسی رابطه دبی با تراز آب بالادست و بررسی ضریب دبی جریان در حالت مدل-سازی و آزمایشگاهی مورد بررسی قرار گرفت. نتایج عددی در شرایط، شبکه محاسباتی شامل 10602 گره، مدل آشفته دو معادلهای k- استاندارد و تابع دیواره استاندارد بهترین نتایج را برای مدلسازی جریان آب در سرریز مدور قائم را ارائه میدهد. در بررسی پروفیل رویه و زیرین جت ریزشی تطابق بسیار خوبی بین نتایج عددی و نتایج عددی دیده شد. همچنین بین نتایج تراز آب بر روی تاج سرریز و دبی سرریز شده مشخص شد در ترازهای آب کم، نتایج در مدلسازی عددی تقریبا با نتایج عددی تطابق دارد؛ اما با افزایش تراز آب بر روی تاج سرریز اختلاف بین دبی عددی و آزمایشگاهی زیاد میگردد. د...
Drops are hydraulic structures that are commonly used in irrigation and waste water collection ne... more Drops are hydraulic structures that are commonly used in irrigation and waste water collection networks. A vertical drop balances the elevation difference between the channel slope and ground slope. Earlier investigations on this structure have mainly focused on experimental studies of the hydraulic characteristics. In this paper, the hydraulic characteristics of vertical drops with inverse apron have been studied numerically with used of Fuent software to solve the finite volume method. The volume of fluid (volume of fluid) was used for modeling the free surface. Flow characteristics such as downstream depth, pool depth and energy loss were calculated and compared with the experimental values. Different turbulent models and grids have been studied. The numerical results with a 52745-node grid, 1.5 meter downstream channel length, standard k-ε turbulence model and standard wall function showed the best agreement and the numerical downstream depth, pool depth and energy loss followed the theoretical equations very well. Finally the numerical impact velocities were compared to empirical equation for different cases and showed little discrepancy, therefore velocity characteristics of falling jet were calculated.
Journal of Water Supply: Research and Technology - Aqua, 2017
Water Resources Management, 2016
Advances in Intelligent Systems and Computing, 2015
Nowadays, due to increasing population and water shortage and competition for its consumption, es... more Nowadays, due to increasing population and water shortage and competition for its consumption, especially in the agricultural that is the largest consumer of water, proper and suitable utilization and optimal use of water resources is essential. One of the important parameters in agriculture field is water distribution network. In this research, differential evolution algorithm (DE) was used to optimize Ismail Abad water supply network. This network that is pressurized network and includes 19 pipes and nodes 18. Optimization of the network has been evaluated by developing an optimization model based on DE algorithm in MATLAB and the dynamic connection with EPANET software for network hydraulic calculation. The developing model was run for the scale factor (F), the crossover constant (Cr), initial population (N) and the number of generations (G) and was identified best adeptness for DE algorithm is 0.6, 0.5, 100 and 200 for F and Cr, N and G, respectively. The optimal solution was compared with the classical empirical method and results showed that Implementation cost of the network by DE algorithm 10.66% lower than the classical empirical method.
Journal of Water Resource and Protection, 2015
In arid and semi-arid regions, collection of surface and subsurface waters in small seasonal rive... more In arid and semi-arid regions, collection of surface and subsurface waters in small seasonal rivers is very crucial, particularly in dry seasons. The cost of construction and maintenance of the classical water intakes makes them inappropriate for such rivers. In this study a rather new method to divert surface and subsurface water is experimentally evaluated. In this kind of intakes, a couple of trenches are excavated and the drain pipes are installed in them and then filled with very porous materials. Indeed the system acts as a river drainage network. This method not only reduces the construction and maintenance costs but also minimize the disturbance of river topology and morphology. Therefore this intake is also suitable for rivers with high sedimentary loads. In this study an experimental model of the subsurface intake was constructed and the effective parameters such as water head, installation depth, drains interval, porous media length, and drains arrangement (10, 20, 30, 40, 50, 60, and 150 cm) was evaluated. The results showed that the drains flow rate changes along the porous media depending on the hydraulic head above each drain so that in constant up-and downstream head, the minimum discharge was observed in the central drain. The assessment of different drains arrangement indicated that bi-level installation was superior to mono-level drains. Finally the regression equations were established to estimate the discharge of each drain based on dimensional analysis, which facilitate the design of this structure .
Progress in Computational Fluid Dynamics, An International Journal, 2014
ABSTRACT The complex flow over three vertical drops (horizontal apron, adverse apron, horizontal ... more ABSTRACT The complex flow over three vertical drops (horizontal apron, adverse apron, horizontal apron with an end sill) were studied numerically and compared to experiments and empirical functions. In addition to flow depth, energy loss, and free-surface profiles, detailed velocity, pressure and shear stress distribution, which are hard to be measured experimentally, were investigated. The 2D numerical results on a 57,512-node grid, using standard k-ε turbulence model and standard wall function showed the best agreement with experimental results. The energy loss in the drop with an end sill was higher than the adverse apron drop and the latter more than the horizontal apron drop. The numerical length and velocity scales confirmed the experimental similarity profiles. However, due to dissipative nature of the turbulence model, the velocity gradient in the shear layer was numerically dispersed particularly near the pool end. The stagnation pressure and shear stress were computed numerically for the drops. The maximum stagnation pressure and shear stress occurred in the horizontal apron drop.