Numerical study of oscillating lid driven cavity with the presence of an obstacle using immersed boundary method

Abstract

In this paper, an oscillating lid driven cavity with an obstacle at center is simulated to study the effects on fluid mixing for various oscillating frequency (ω) and Reynolds number (Re). The oscillating lid promotes the generation of vortices and further presence of an obstacle breaks them into multiple sub-vortices which greatly enhance fluid mixing. This study is carried out to find the optimum parameters of the fluid mixing. It is performed by discretizing continuity and momentum equations using finite volume method on staggered grid system. The fluid–structure interaction is studied using feedback forcing scheme based immersed boundary method (IBM). A numerical model is developed and validated with previous results, and then simulations are carried out for different Re and ω to find the optimum for efficient fluid mixing inside the cavity. © 2022