Urgent!!!

ashish

Dear Sir/madam, i am trying to emulate the gas turbine combustion chamber with 4 air fans to provide the air in the mixture. When I run the geometry without any fans it gives good results without any combustion. i.e. transient flow but without combustion and no air is mixed at this stage to methane. However when I made modifications in source terms of K and Epsilon to simulate the fan effect (i.e. by adding dk/dt term to k and depsilon/dt term to epsilon)the pressure level gets unset and run cannot be completed. I tried using pref for compressible transient = t. after its use it gives another error that pressure has not been set at any boundary condtions. Well I have 3 symmetry boundary conditions and 1 wall boundary condition to simulate the spherical geometry. How can i set the pressure at symmetry and wall boundary conditions. I will be obliged if anyone have any views on it.. p.s: it gives error in Makdir subroutine... Thank you for support. regards, ashish