离散化
反向欧拉法
欧拉公式
欧拉方程
半隐式欧拉法
数学
流量(数学)
欧拉法
机械
欧拉路径
逆风格式
欧拉求和
计算流体力学
数学分析
气泡
欧拉-拉格朗日方程
多相流
应用数学
物理
拉格朗日
几何学
作者
A. Sokolichin,Gerhart Eigenberger,A. D. Lapin,A. Lübert
标识
DOI:10.1016/s0009-2509(96)00425-3
摘要
A dynamical, two-phase flow model in two- and three-space coordinates is presented. The gas-liquid flow is modeled by a Navier-Stokes system of equations in an Eulerian representation. The motion of gas is modeled by a separate continuity equation. The Eulerian approach with UPWIND or TVD discretization and the Lagrangian approach for solving the gas-phase equation are compared with each other on two two-dimensional test problems: the dynamical simulation of a locally aerated bubble column and of a uniformly aerated bubble column. The comparison shows that the results obtained with the TVD-version of the Euler/Euler method and the Euler/Lagrange technique agree quantitatively. On the other hand, it has not been possible to obtain similar agreement even qualitatively with the UPWIND technique, due to the influence of the numerical diffusion effects, which are inherent in the case of UPWIND discretization.
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