Open AccessNumerical Study Of Natural Convection In Square Cavity Using Lattice Boltzmann Method: Obstacles Effect
Author(s) -
A. Bendaraa,
M. Nouni,
M. Ouhroum,
M. M. Charafi,
A. Hasnaoui
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/948/1/012004
Subject(s) - lattice boltzmann methods , prandtl number , mechanics , laminar flow , natural convection , adiabatic process , thermal , square (algebra) , computation , physics , convection , compressibility , combined forced and natural convection , materials science , thermodynamics , mathematics , geometry , algorithm
In this work, the natural convection is studied in a closed square cavity differentially heated, using the Lattice Boltzmann numerical Method. Completely filled with a newtonian fluid, the cavity is managed by two rigid walls in right and left sides, and is provided with two rectangular adiabatic obstacles interposed on the mid-horizontal walls. The height of the two obstacles is varied from 10% to 40% of the side (L). The calculation code was performed for a laminar flow and an incompressible fluid with a Prandtl number Pr = 0.71 (the case of air). The computation code thus developed was used to analyse the effect of the length of obstacles in the mid-square cavity. The obtained results were validated by comparing with those of a previously published works. It has been deduced that the addition of the obstacles influences the thermal and hydrodynamic profiles of the flow inside the cavity and its thermal performances.