Re: About ConvectionBC

[steed188]

Dear Marc,
I used Interpolation pressure BC but it still was not stable in my high Reynolds case so that I tried the convection BC.
Do you mean that the convection BC DOES make the velocity uniform at the outflow?

And I tried Periodic BC. I defined a velocity at the inlet when iT=0, and let the inlet and outlet became periodic at x-direction. But seemed didn’t work. It is like below

Code:

cuboidGeometry.setPeriodicity( true, false, false );
…
sLattice.defineDynamics(superGeometry, 3, &bulkDynamics); //Inlet
sLattice.defineDynamics( superGeometry, 4, &bulkDynamics ); //Outlet
……
sLattice.iniEquilibrium(superGeometry, 3, rhoF, uF);
sLattice.iniEquilibrium(superGeometry, 4, rhoF, uF);
sLattice.defineRhoU( superGeometry, 3, rhoF, uF );
sLattice.defineRhoU( superGeometry, 4, rhoF, uF );
….
sLattice.defineU(superGeometry, 3, uSol); //Define inlet velocity

Best,
steed188