Study of Falling Condensate Droplets on Parallelepiped Solid Surface Using Hybrid 3D MRT-LBM

Abstract

The present work focuses on the development of the 3D MRT-LBM computational method to simulate a droplet formed by the condensation of a gas at a saturation temperature. The droplet falls by the effect of its volume (body force) and collides with a solid surface of parallelepiped shape for different values of 0.25 0.95. This study presents the evolution of the drop from its formation on the upper cold surface until it falls on the lower wall. For this purpose, we present the behaviour of the dropwise on a horizontal surface as well as the parameters which characterise its evolution over time: its radius R, its height H, and its maximum distance during its contact with the obstacle. Moreover, the distribution of its local heat flux in 2D during its first contact with the upper face of the solid obstacle is presented for each value of κ to describe their heat exchange.