Calculation of drag and torque coefficients by time-independent lattice-Boltzmann method

A method is developed to calculate the drag and torque coefficients of an isolated particle in a Stokes flow. The method is based on solving the time-independent lattice-Boltzmann equation. The advantage of this method is that the algorithm is easy to code, the method can be applied to any shape of the particle without complicated implementation, and the computational cost is independent of the shape of the particle. This method is validated and shown to be accurate by comparing with analytical solutions for certain problems.