NUMERICAL SIMULATIONS OF FLOW BEHAVIOR IN DRIVEN CAVITY AT HIGH REYNOLDS NUMBERS

Fudhail Bin Abdul Munir

doi:10.31436/iiumej.v12i6.198

Fudhail Bin Abdul Munir

Open Access

https://doi.org/10.31436/iiumej.v12i6.198

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Abstract

In recent years, due to rapidly increasing computational power, computational methods have become the essential tools to conduct researches in various engineering fields. In parallel to the development of ultra high speed digital computers, computational fluid dynamics (CFD) has become the new third approach apart from theory and experiment in the philosophical study and development of fluid dynamics. Lattice Boltzmann method (LBM) is an alternative method to conventional CFD. LBM is relatively new approach that uses simple microscopic models to simulate complicated microscopic behavior of transport phenomena. In this paper, fluid flow behaviors of steady incompressible flow inside lid driven square cavity are studied. Numerical calculations are conducted for different Reynolds numbers by using Lattice Boltzmann scheme. The objective of the paper is to demonstrate the capability of this lattice Boltzmann scheme for engineering applications particularly in fluid transport phenomena. Keywords-component; lattice Boltzmann method, lid driven cavity, computational fluid dynamics.

Highlights

Computational Fluid Dynamics (CFD) has been extensively used for the analysis of system pertaining to engineering field like fluid flows, heat transfer, chemical reaction, evaporation, condensation [1]
The basic idea of Boltzmann work is that a gas is composed of interacting particles that can be explained by classical mechanics [9]
Apart from that, the number of secondary vortex is affected by the increase of Reynolds numbers for shear driven cavity

Summary

INTRODUCTION

Computational Fluid Dynamics (CFD) has been extensively used for the analysis of system pertaining to engineering field like fluid flows, heat transfer, chemical reaction, evaporation, condensation [1]. Fluid flow behaviors inside lid driven cavities have drawn many interested researchers and scientists. Numerous studies have been carried out on flow patterns inside a cavity. The numerical simulation of driven cavity flow at high range of Reynolds number using high grid numbers had been conducted in [6]. These researchers used the conventional CFD method which is by solving the 2-D Navier Stokes equation. The LBM is better than the classical CFD in the range of small to moderate Reynolds numbers if dealing with flows in complex geometries [8]

LATTICE BOLTZMANN METHOD

CONCLUSION