! Hello! Thank for your kind reply again! You mean if I created one boundary name by combining 6 inlets areas, so I have to multiply mass flow inlet value of one inlet with 6 times, am I right? Yes! It seems to be reasonable and correct, but I did not do that, I applied only the value of one mass flow inlet, and probably this is why I get the wrong velocity. Thank you for this advice! I will correct the value of mass flow rate and see the results, then I will let you know! n