user_bndSYNOPSIS
call user_bnd(solnData, block_no,neigh , bndcnd)
call user_bnd(real(:,:,:,:), integer, integer, integer)
DESCRIPTION
Implement hydrostatic boundary conditions, with either density, temperature, or entropy held constant in the guardcells, and allowing the velocity to be outflow, diode, or reflecting. Different orders of the HSE differencing are allowed.