MODELLING METHOD OF SOLID WALL BOUNDARY CONDITION IN COMPRESSIBLE BOLTZMANN METHOD

摘要

A method for modeling a wall boundary condition of a compressive Boltzmann analysis technique is disclosed. The method for modeling a wall boundary condition of a compressive Boltzmann analysis method according to the present invention includes the steps of: determining whether an inner product of a vector for a velocity lattice point and a normal vector of a wall boundary on a velocity phase space formed by a velocity lattice is positive or negative; calculating a first distribution function at a next time step after a predetermined time from a current time step if the inner product is negative in the determining step; calculating a second distribution function using number density, an equilibrium state function, and a non-equilibrium state function if the inner product is positive in the determining step; and calculating the macroscopic velocity and temperature of a gas flow near the wall boundary using the first and second distribution functions. Accordingly, the present invention can simulate a non-slip boundary with constant velocity and temperature.