lid driven cavity

sudha

hi all,

I have written a 2D finite volume steady incompressible Navier-Stokes code for lid driven cavity problem. I observed that at Re=100, it gives accurate results for 50*50 grid. But if I increase the number of grid points, it behaves with increased numerical viscosity (max u velocity at the centreline keeps on reducing as I increase the number of grids). I have used central differencing scheme for both convective and diffusive terms. can any one tell me is this the property of the scheme? Also where I can find materials regarding how to implement boundary conditions exactly in staggered grid? thank you,