Lattice Boltzmann modelling of capillarity-induced resonance of blob inside a circular tube

Abstract

The capillarity induced resonance has been one of the promising method as far as the mobilization of trapped blob is concerned. In this context, lattice Boltzmann Shan and Chen model is employed to analyze the movement of a 3-D immiscible blob influenced by oscillatory acoustic excitation in a tube. The influence of the physicochemical parameters which includes wettability, width of tube, viscosity, magnitude of the force and frequency on blob dynamics are discussed. The effect of frequency on the blob shows peak displacement of the blob at resonance frequency. The resonance behaviour of blob with various wettabilities and capillary numbers is analyzed to understand capillarity-wettability interaction. Mobilization study of the blob reveals that wettability plays a crucial role in the blob mobilization at low capillary number.