Case check - Velocity-Inlet not compatible with compressible flows

fluent-user · September 15, 2009, 08:16

Fluent case-check reports: Change inlet boundary conditions. Velocity-Inlet boundary conditions are not compatible with compressible flows.

Actually there's no compressible flow defined. Defined fluid is a mixture consisting of hydrogen and carbon-dioxyde, both with constant density and volume-weighted-mixing-law defined for the mixture.

Does anybody know the reason for this problem?

kind regards

Laci · September 15, 2009, 09:36

In the available materials in fluid panel air is still there (as default). Maybe there you set compressible density before.

fluent-user · September 15, 2009, 09:46

Thanks for your fast answer, but i think you didn't get the problem. Maybe my description was bad.

The problem does not concern the fluid or mixture, i don't understand the cited case-check message from fluent, because there doesn't exist any compressible flow in the domain.

September 15, 2009, 08:16	Case check - Velocity-Inlet not compatible with compressible flows	#1
fluent-user New Member Join Date: Sep 2009 Location: Germany Posts: 6 Rep Power: 17	Fluent case-check reports: Change inlet boundary conditions. Velocity-Inlet boundary conditions are not compatible with compressible flows. Actually there's no compressible flow defined. Defined fluid is a mixture consisting of hydrogen and carbon-dioxyde, both with constant density and volume-weighted-mixing-law defined for the mixture. Does anybody know the reason for this problem? kind regards

September 15, 2009, 09:46		#3
fluent-user New Member Join Date: Sep 2009 Location: Germany Posts: 6 Rep Power: 17	Thanks for your fast answer, but i think you didn't get the problem. Maybe my description was bad. The problem does not concern the fluid or mixture, i don't understand the cited case-check message from fluent, because there doesn't exist any compressible flow in the domain. Last edited by fluent-user; September 15, 2009 at 11:09.

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September 15, 2009, 09:36		#2
Laci Member anonym Join Date: Mar 2009 Posts: 65 Rep Power: 17	In the available materials in fluid panel air is still there (as default). Maybe there you set compressible density before.