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Numerical simulation of the movement of the water surface with macroscopic particles during a partial dam break for various complex reliefs

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SIMULATION-TRANSACTIONS OF THE SOCIETY FOR MODELING AND SIMULATION INTERNATIONAL 2025年第1期101卷 13-28页

作者： Issakhov, Alibek Abylkassymova, Aizhan Minnullina, Saniya Kazakh British Tech Univ Alma Ata 050000 Kazakhstan Al Farabi kazakh Natl Univ Almatyt Kazakhstan Int Informat Technol Univ Alma Ata Kazakhstan

In this paper, it was considered a numerical simulation of the water surface movement during the partial collapse of the destruction of a dam with complex terrain. The numerical simulations took into account debris after a partial collapse of the dam, which imitates debris and moves downstream with the water flow. Carrying out these calculations brings the results closer to the real scenario. The mathematical model was based on the Navier-Stokes equations and uses the turbulent large eddy method (LES) model describing the flow of an incompressible viscous fluid. To describe the movement of a two-phase fluid, the volume of fluid (VOF) methods for the phase were used, and the Discrete Phase Model (DPM) and Macroscopic Particle Model (MPM) were used to describe the movement of particles. For the numerical solution of this system of equations, the Pressure Implicit Split Operator (piso) numerical algorithm was chosen. The results show that the model is accurate and capable of handling very complex interactions such as particle transport or hydrodynamic actions on structures if the appropriate scales are reproduced. Also in this work, a three-dimensional (3D) model of the flow of a dam break on uneven terrain was considered and combined problems were performed that are closer to real conditions. For combined problems, flood zones and flood times were determined, knowledge of which will help evacuate people from dangerous areas. The accuracy of the 3D model and the selected numerical algorithm were verified using two natural measurements.

关键词： Dam break modeling MPM and DPM interaction of macroscopic particles flood zones piso algorithm VOF method

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Determination of the flooding zone during a dam break in a channel with a bend in the presence of several obstacles by the VOF method

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Journal of Mountain Science 2024年第11期21卷 3754-3766页

作者： Alibek ISSAKHOV Zhansaya RAKHYMZHANOVA Aizhan ABYLKASSYMOVA Kazakh British Technical University Almaty 050000Republic of Kazakhstan International Information Technology University AlmatyRepublic of Kazakhstan al-Farabi Kazakh National University Almaty 050040Republic of Kazakhstan

This paper aims to investigate a dam break in a channel with a bend in the presence of several *** accurately determine the flood zones,it is necessary to take into account many factors such as terrain,reservoir *** modeling was used to determine the flood *** modeling based on the Navier-Stokes equations with a turbulent k-epsilon RNG model,the Volume of Fluid(VOF)method and the piso algorithm were used to analyze the flow in a bend channel at an angle of 10 with the *** verify the numerical model,a test on dam break in the 450 channel was *** simulation results were compared with experimental data and with the numerical data of existing *** been convinced of the correctness of the mathematical model,the authors carried out a numerical simulation of the main problem in three versions:without barriers,with one obstacle,with two *** to the obtained numerical results,it can be noted that irregular landforms held the flow,a decrease in water level and a slower time for water emergence could be ***,the water flow without an obstacle,with one obstacle and with two obstacles showed 4.2 s,4.4 s and 4.6 s of the time of water appearance,*** time shift can give a certain advantage when conducting various events to evacuate people.

关键词： VOF method piso algorithm Dam break Navier-Stokes equation

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A piso-like algorithm to simulate superfluid helium flow with the two-fluid model

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COMPUTER PHYSICS COMMUNICATIONS 2015年 187卷 20-28页

作者： Soulaine, Cyprien Quintard, Michel Allain, Herve Baudouy, Bertrand Van Weelderen, Rob Univ Toulouse INPT UPS IMFT F-31400 Toulouse France CNRS IMFT F-31400 Toulouse France CERN TE CRG CH-1211 Geneva 23 Switzerland CEA Saclay Irfu SACM F-91191 Gif Sur Yvette France

This paper presents a segregated algorithm to solve numerically the superfluid helium (He II) equations using the two-fluid model. In order to validate the resulting code and illustrate its potential, different simulations have been performed. First, the flow through a capillary filled with Hell with a heated area on one side is simulated and results are compared to analytical solutions in both Landau and Gorter-Mellink flow regimes. Then, transient heat transfer of a forced flow of He Ills investigated. Finally, some two-dimensional simulations in a porous medium model are carried out. (C) 2014 Elsevier B.V. All rights reserved.

关键词： Cryogenic Two-fluid model Superfluid helium Simulation piso algorithm

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Numerical study of dam-break fluid flow using volume of fluid (VOF) methods for different angles of inclined planes

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SIMULATION-TRANSACTIONS OF THE SOCIETY FOR MODELING AND SIMULATION INTERNATIONAL 2021年第11期97卷 717-737页

作者： Issakhov, Alibek Zhandaulet, Yeldos Al Farabi Kazakh Natl Univ Dept Math & Comp Modelling Alma Ata Kazakhstan Kazakh British Tech Univ Dept Math & Cybernet Alma Ata Kazakhstan

In this paper, the effects of water on obstacles in dam-break flow for different angles of the inclined planes have been numerically examined. The presented computational data are compared with data from the experiment and computational simulation data of other authors. Good agreements between the obtained simulation results and measurement data demonstrate the satisfactory performance of the mathematical model and the numerical algorithm when reproducing a dam-break flow. Additionally, various problems were also considered: the effect of pressure distribution on the dam walls for different angles of the inclined plane. It was found that pressure distribution on the wall when the inclined angle gamma = 15 degrees was almost two times more than without inclination. To reduce the shock pressure value a new form of obstacle was used. With a new form of obstacle, the maximum pressure value on the dam wall decreased more than three times.

关键词： Dam-break flow simulations angles of inclined planes piso algorithm Navier-Stokes equations

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Numerical modelling of the water surface movement with macroscopic particles of dam break flow for various obstacles

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JOURNAL OF HYDRAULIC RESEARCH 2021年第4期59卷 523-544页

作者： Issakhov, Alibek Imanberdiyeva, Medina al Farabi Kazakh Natl Univ Dept Math & Comp Modelling Alma Ata Kazakhstan Kazakh British Tech Univ Dept Math & Cybernet Alma Ata Kazakhstan

In this paper, the movement of the water surface with macroscopic particles during a dam break flow using the volume of fluid (VOF) methods, the discrete phase model (DPM) and macroscopic particle model (MPM) models were numerically simulated. To solve this equation system numerically, the piso numerical algorithm was chosen. The accuracy of the 3D model and the selected numerical scheme were tested using some laboratory measurements on the destruction of the dam break problem. In the test problem, the values were matched with measurement values and simulation data of other authors. Furthermore, two problems were also considered, the first problem is dam break flow with macroscopic particles, and the second problem - water movement with macroscopic particles, through a heterogeneous terrain and a dam that has a hole. With the help of the problems, the flooding zones and the time of flooding evacuating people from dangerous areas were determined.

关键词： Dam break modelling DPM and MPM models flooding zones macroscopic particle interaction piso algorithm VOF method

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Numerical Simulation of Dam Break Waves on Movable Beds for Various Forms of the Obstacle by VOF Method

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WATER RESOURCES MANAGEMENT 2020年第8期34卷 2269-2289页

作者： Issakhov, Alibek Zhandaulet, Yeldos Al Farabi Kazakh Natl Univ Alma Ata Kazakhstan Kazakh British Tech Univ Alma Ata Kazakhstan

This paper considered the problem of numerical simulation of an incompressible dam break flow consisting of three phases. The movement of the water free surface was carried out using the Newtonian fluid model, and the mud impurity movement was performed by the non-Newtonian fluid model based on the VOF method. The piso numerical algorithm was chosen as a numerical method for solving equations. This paper discusses the problems of dynamic loads arising from the impact of a dam break flow using numerical modeling. The obtained numerical results were compared with the two experiment results, which allow confirming the behavior of the instantaneous flow and the evolution of pressure at the relative points of the obstacle. Moreover the water flow and non-Newtonian fluid for different forms of obstacles were also modeled. It was found that a non-Newtonian fluid extremely reduces the maximum shock pressure value of the water flow.

关键词： Dam break flow modeling Mud flow Non-Newtonian fluid piso algorithm VOF method

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Numerical study of dam break waves on movable beds for various forms of the obstacle by VOF method

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OCEAN ENGINEERING 2020年 209卷 107459-107459页

作者： Issakhov, Alibek Zhandaulet, Yeldos Al Farabi Kazakh Natl Univ Alma Ata Kazakhstan Kazakh British Tech Univ Alma Ata Kazakhstan

This paper considered the problem of numerical simulation of an incompressible dam break flow consisting of three phases. The movement of the water free surface is performed using the Newtonian fluid model, and the mud mixture movement is carried out by the non-Newtonian fluid model based on the VOF method. The piso numerical algorithm was selected as a numerical method for solving equations. This paper discusses the problems of dynamic loads arising from the impact of a dam break flow using numerical modeling. The received computational data are matched with the two experiment results, which allow confirming the behavior of the instantaneous flow and the evolution of pressure at the relative points of the obstacle. The water flow and non-Newtonian fluid for different forms of obstacles were also modeled. It was found that a non-Newtonian fluid rather strongly reduces the maximum shock the pressure value of the water flow.

关键词： Mud flow Dam break flow modeling Non-Newtonian fluid VOF method piso algorithm

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Numerical Study of Dam Break Waves on Movable Beds for Complex Terrain by Volume of Fluid Method

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WATER RESOURCES MANAGEMENT 2020年第2期34卷 463-480页

作者： Issakhov, Alibek Zhandaulet, Yeldos Al Farabi Kazakh Natl Univ Alma Ata Kazakhstan Kazakh British Tech Univ Alma Ata Kazakhstan

In this study, a method based on the Navier-Stokes equation was developed to simulate the dam break flow. The free surface movement of water is carried out using the Newtonian fluid model, and the mud impurity movement is performed by the model of non-Newtonian fluid based on the volume of fluid (VOF) method. In order to minimize the fluctuations of the free surface near a moving front, the VOF method was used. The numerical Pressure-Implicit with Splitting of Operators (piso) algorithm was chosen as a numerical method for solving equations. The developed model is verified with a wide range of measurement results and with the computational data of other authors. Good computational data were obtained from flood forecasting resulting from the instantaneous collapse of the dam. It has been demonstrated that this model is well balanced and reliable, and can accurately record the movement of dam break in difficult terrain. With the help of the proposed model, the Mynzhylky dam break flow was modeled.

关键词： Dam breaks modeling Mud flow Non-Newtonian fluid piso algorithm VOF method

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Numerical study of the Bingham fluid flow in a cylindrical enclosure with exact Bingham model

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JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING 2020年第4期42卷 1-15页

作者： Jahromi, H. R. Askarifard Raisi, A. Ghasemi, B. Nadooshan, A. Ahamadi Shahrekord Univ Fac Engn POB 115 Shahrekord Iran

In the present paper, the non-iterative piso algorithm and finite volume method are employed to solve the exact Bingham fluid flow. The OpenFOAM solver, i.e., icoFoam, is modified to achieve this goal. The accuracy of numerical procedures is obtained by reproducing the results of Chupin and Dubois (Comput Math Appl 72:1263-1286, 2016. doi:10.1016/***.2016.06.026). Then, the Bingham fluid flow in a cylindrical enclosure with the rotating top wall is numerically studied by the modified solver for the following ranges of conditions: Reynolds number, 1 <= Re <= 1000, Bingham number, 0 <= Bn <= 1000 and aspect ratio (AR) of 1, 1/2, 1/4, 1/8 and 1/16. The variation of yielded regions percentage with Re and Bn is plotted for AR = 0.5 and 1. It is found that Reynolds number change in the range 1 <= Re <= 10Bn has no significant effect on the size and shape of the unyielded regions for constant Bn and AR = 1. The effect of Re, Bn and AR on the primary (Qp*) and secondary (Qs*) volumetric flow rate is also discussed. A correlation is proposed in terms of Re and Bn to approximate the torque coefficient (CT) for 1 <= Re <= 100,0 <= Bn <= 1000, and different aspect ratios.

关键词： Exact Bingham model Finite volume method piso algorithm OpenFOAM Cylindrical enclosure

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Numerical simulation of the movement of water surface of dam break flow by VOF methods for various obstacles

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 2019年 136卷 1030-1051页

作者： Issakhov, Alibek Imanberdiyeva, Medina Al Farabi Kazakh Natl Univ Av Al Farabi 71 Alma Ata 050040 Kazakhstan

In this paper, the movement of the water surface is numerically simulated when a dam is broken by the volume of fluid (VOF) method. The mathematical model is based on the Navier-Stokes equations and uses the LES turbulent model, describing the flow of an incompressible viscous fluid and the equation for the phase. These equations are discretized by the finite volume method. Numerical piso algorithm was chosen for numerical solution of this equation system. The movement of the water surface is captured by using the VOF method, which leads to a strict mass conservation law. The accuracy of the 3D model and the chosen numerical algorithm were tested using several laboratory experiments on dam break problem. In each of the problems, the obtained results were compared with the experimental data and several calculations by other authors and in each of the test problems, the developed model showed results close to the experimental data. Comparison of simulation results with experimental data for various turbulent models was also performed. And also a three-dimensional model of dam break flow on uneven terrain was developed. And also two combined problems were performed which are more close to real conditions, with the help of these problems, flooding zones and flooding time were identified that would help in evacuating people from dangerous zones. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Dam breaks modeling Flood zone Navier-Stokes equations piso algorithm VOF method Large eddy simulation (LES)

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