I am using Lattice Boltzmann to simulate Plane-Poiseuille flow. I wanted to know if I am working in velocity range from zero to 0.15 How much change in density values is acceptable
. Density was initialized with 1.0 and after the convergence density value is 0.995
Am I wrong somewhere in the code or this value is because of compressibility effects??
in LBM \rho is lineraly related to pressure. The mentioned case converges to the analytical NSE solution, so the reported values must be as they are. You may checkout and study the provided error normss