Simulation of flow in two-sided lid-driven square cavities by the lattice Boltzmann method

Abstract

Due to the presence of corner eddies that change in number and pattern, the classical one-sided lid-driven cavity problem has been found to be particularly suitable to study various aspects of the performance of solution algorithms for incompressible viscous flows. More recently, the flow induced by the motion of two facing walls (two-sided lid-driven cavity) has also been investigated by Kuhlmann et al. For some aspect ratios this study demonstrates the existence of a multiplicity of solutions. However, for the aspect ratio of unity no multiplicity of solutions has been observed. Also it is found that for parallel motion of the walls, there appears a pair of counter-rotating secondary vortices of equal size near the centre of a wall. Because of symmetry, this pair of counter-rotating vortices has similar shapes and their detailed study as to how they grow with increasing Reynolds number has not yet been made. Such a study is attempted in this paper through the lattice Boltzmann method (LBM), as the problem has the potential of being used for testing various solution methods for incompressible viscous flows. The results for the antiparallel motion of the walls are also presented in detail. As the problem has not been investigated before, to lend credibility to the results they are further compared with those obtained from a finite difference method (FDM) code developed for this purpose.

Time reversibility and non-deterministic behaviour in oscillatorily sheared suspensions of non-interacting particles at high Reynolds numbers

“…Streamlines for the classical two-sided lid-driven square cavity problem (A=1, Re=10 3 : mesh 100x100,  max =155.5). Table I: Position of the primary and secondary vortices for the two-sided lid-driven square cavity and Re=10 3 : present mesh 100x100; * FDM results after Perumal and Dass (2008) As shown in Fig. 3, the present velocity profiles obtained with grids 100x100 and 200x200 are almost indistinguishable.…”

“…The present algorithm for the solution of the Navier Stokes in the presence of moving top and bottom walls was validated through comparison with analogous results available in the literature (well-defined benchmarks). In particular we have considered the simulations performed for the classical two-sided lid-driven square cavity (case with antiparallel wall motion and constant imposed velocity) by Perumal and Dass (2008) and Karmakar and Pandit (2015) and a representative value of the Reynolds number (Re=10 3 , see Figs. 2-3).…”