Applying Lattice Boltzmann Method and Finite Volume Method to simulate temperature and flow fields of high viscosity fluids

Abstract

In this study the Lattice Boltzmann Method is used to calculate the free surface flow and the resulting flow field are used to solve the energy equation by the Finite Volume Method for the temperature field LBM is a mesoscopic simulation method which has many advantages as simple programming high calculation efficiency and applicability to two-phase flow The LBM method uses the lattice parameters for the simulation while the finite volume method uses physical parameters for the energy equation The FVM has been widely used in solving the energy equation for heat transfer problems This study can be divided into two parts In the first part we use the Finite Volume Method and Lattice Boltzmann Method with Free Surface boundary to simulate the velocity and temperature distributions of the filling flow in a channel The movement of the flow front in a channel was simulated while the heat transfer of the fluid was also calculated In the simulation there are problems should be solved including the heat transfer at liquid/interface and interface/gas speed correction of liquid grid and regulation of time step between LBM and FVM In the second part we discuss the effects of parameters of high viscosity fluids on calculation errors and find out the range of LBM parameters applicable to this problem

Date of Award	2020
Original language	English
Supervisor	Wen-Bin Young (Supervisor)