A time-splitting pressure-correction projection method for complete two-fluid modeling of a local scour hole

作     者：Kambiz Farahi Moghadam Mohammad Ali Banihashemi Peyman Badiei Ali Shirkavand Kambiz Farahi Moghadam;Mohammad Ali Banihashemi;Peyman Badiei;Ali Shirkavand

作者机构：School of Civil EngineeringCollege of EngineeringUniversity of Tehran Department of Civil EngineeringCollege of EngineeringVaramin-Pishva BranchIslamic Azad University 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2020年第35卷第4期

页      面：395-407页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0903[农学-农业资源与环境] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 

主　　题：Numerical modeling Complete two-fluid model Time-splitting pressure-correction projection method Local scour hole Sediment concentration Longitudinal fluid velocity 

摘      要：A two-dimensional vertical(2DV),Eulerian two-phase model or complete two-fluid model of the free surface flow was developed to simulate water-sediment flow in a local scour *** the model,the complete forms of the vertical,two-dimensional,two-fluid Navier-Stokes equations were discretized using a finite volume *** discretization was done based on a standard staggered grid system using a curvilinear network system in compliance with the bed boundaries and water *** the beginning of the computational cycle,the equations governing the fluid phase were solved based on the two-step projection method with a pressure-correction *** the first step,the intermediate fluid velocities were obtained by solving different phases of the mome ntum equatio ns of the fluid phase using the time-splitting *** the second step,pressure was obtained and fluid velocities we re *** this step a simple discretization method was applied for decreasing the computational *** obtaining all the fluid phase variables at a new time step,the sediment phase momentum equations were solved using the time-splitting technique and sediment velocities were ***,at the end of the computational cycle,the sediment phase mass equation was solved and the concentrations of both phases were *** last,the capacity of the model for simulating of the longitudinal fluid velocity and sediment concentration in a local scour hole was *** results were found to be in good agreement with experimental data.