基于颜色格子Boltzmann模型的三相流改进

An Improvement of Three-phase Flow Based on the Binary Phase Color-gradient Lattice Boltzmann Model

近年来,格子Boltzmann方法已经被广泛用于模拟多相多组分流体。颜色梯度格子Boltzmann模型是其中一种有效的多相流模型,其最主要的优点是粘度比范围很大。目前颜色梯度主要研究方向是侧重于大粘度、大密度、降低虚速度、改进润湿性、引入多物理耦合场等方面。关于三相流的研究在近五年十分火热,值得进一步探讨。目前的三相流模型所侧重的主要是对表面张力参数、再着色步和密度比这三方面进行修正,以提高模型的适用范围和精确度。本文主要从一个新的视角考虑,进一步改进颜色梯度的计算方式,得到了较好的结论。

In recent years,the lattice Boltzmann method has been widely used to simulate multiphase multi-component fluid.The color gradient lattice Boltzmann model is an effective multiphase flow model,and its main advantage is that it has a high viscosity ratio.At present,the main research direction of color gradient is to focus on the large viscosity,large density,reduce the spurious velocity,improve wettability,and introduce the multi-physical coupling field.The research on three-phase flow is very hot in the past five years,which deserves further discussion.The current three-phase flow model focuses mainly on the modification of surface tension parameters,recolor and density ratio,so as to improve the application range and accuracy of the model.This paper mainly considers from a new angle,further improve the calculation method of color gradient,and obtains a better conclusion.