Small change to boundary conditions subroutine; this removes a conflict of intent for scalar field k, which  appeared to be benign but was in any case ugly.
Small change to boundary conditions subroutine; this removes a conflict of intent for scalar field k, which
 appeared to be benign but was in any case ugly.

FluidityProject/multifluids,FluidityProject/multifluids,FluidityProject/multifluids,FluidityProject/multifluids