[stephan]

hi all,

i try to change the piso algorithm for incomp. flows (zero divergence condition) to a piso for incomp. flow with a given divergence that is non zero but constant for one timestep. ( the value will change over time but is known)
in this forum it was mentioned that
UEqn.H() gives something like \sum_n a_n u_n.
is the pressure gradient and the old-value for the velocity U included in Ueqn.H()???
Does UEqn.H change the a_n if U changes or are the coefficients constant for one timestep.
and if the pressure gradient in included in UEqn.H(), does UEqn.H() change when the pressure changes?
i hope somebody can help me..
thanx in advance
stephan