Numerical study of the heat and mass transfer processes with the Lattice Boltzmann method: Laminar Mixed Convection in a Square Open C

Identifier:  TDX:2284

Handle: https://hdl.handle.net/20.500.11797/TDX2284

Authors:  Burgos Vergara, Javier

Abstract:
The topic of this thesis is the numerical study and implementation of the LBM using D2Q9-model for Multiple Relaxation Time (MRT), this model was applied for the fluid flow, temperature and concentration field . A code was developed using an open-source LBM code and modified for the purpose to simulate the heat and mass transfer process. This thesis is divided in two parts. (I) Study of the laminar flow in a pipe and channel were simulate (Hagen-Poiseuille flow), as well as a Lid-driven cavity for a incompressible laminar flow and convection-diffusion problem of a Gaussian pulse was executed , for a heat and mass transfer, natural convection in a closed cavity and mass flux rate in a plate were performed with the objective to analyze the boundary condition of LBM for passive scalar concentration. (II) The main objective was the study of the steady and unsteady laminar flow in a channel with open square cavity and heated bottom wall. The Boussinesq approximation equation were applied, and it obtained a good accuracy and stability. LBM was compared against results obtained by ANSY-Fluent software for validation. Temperature, velocity and Nusselt number, calculated with TLBM presented very well agreement for the set of Reynolds and Richardson numbers studied.