Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 23, 2018 - November 25, 2018
For an improvement of the multiphase flow simulations on/inside complex geometry, the conservative Allen-Cahn equation is coupled with the pressure evolution equation, and they are solved by the lattice Boltzmann method (LBM). Furthermore, the cubic boundary condition is employed at the solid-fluid boundary in order to reproduce the given contact angle in higher order. The present method is evaluated for a sessile droplet on a flat plate. Since the diffuse interface method by LBM tends to leak the phase volume from the interfaces, we imposed on the phase volume conservation and evaluated with different given contact angles. The contact angle representation is also investigated. It is confirmed that the given contact angle agrees well with the resulted contact angle from lyophilic to lyophobic surface wettability. The volume leakage can be suppressed up to 2% which is not from the liquid-solid interface but from gas-liquid interface.
