Total Pressure only increases

Maddin · February 10, 2010, 12:10

I made a simple intercooler simulation.
The total pressure of inlet and outlet of the core (actually without porous medium) only increases and didn't get constant. But pressure drop is nearly constant.
K-Omega, steady - good poly mesh.
Temperatures etc. are constant, only pressure fools me.
The core is connected via 2 interfaces, total pressure report runs on the interfaces.

Somebody an idea? unsteady effects? faults in the report because of the interface?

Maddin · February 10, 2010, 12:28

Argh.. I think I found the error. The "old" ccm bug with interfaces.
I tried the other side of the interface and there the pressure seems to be constant - but I will test it.

Maddin · February 11, 2010, 04:12

No that wasn't the solution, same "trend"...

Maddin · February 15, 2010, 07:14

Problem solved, used coupled flow... don't know why I used the coupled but with segregated all is fine.

February 10, 2010, 12:10	Total Pressure only increases	#1
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	I made a simple intercooler simulation. The total pressure of inlet and outlet of the core (actually without porous medium) only increases and didn't get constant. But pressure drop is nearly constant. K-Omega, steady - good poly mesh. Temperatures etc. are constant, only pressure fools me. The core is connected via 2 interfaces, total pressure report runs on the interfaces. Somebody an idea? unsteady effects? faults in the report because of the interface?

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February 10, 2010, 12:28		#2
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	Argh.. I think I found the error. The "old" ccm bug with interfaces. I tried the other side of the interface and there the pressure seems to be constant - but I will test it.

February 11, 2010, 04:12		#3
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	No that wasn't the solution, same "trend"...

February 15, 2010, 07:14		#4
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	Problem solved, used coupled flow... don't know why I used the coupled but with segregated all is fine.