Inviscid compressible flow using rhoSimpleFoam

ishan_ae · November 12, 2020, 05:19

Hello.

Is it possible to setup inviscid compressible simulation using rhoSimpleFoam ?

I made the following changes to my setup to setup an inviscid case:

slip walls instead of noSlip
Sutherland coefficients set to zero in thermoPhysical file
turbulence set to off in the turbulence file

I have looked in the posts here but could not get complete information.

Can someone please tell me should I make any more changes ?

dlahaye · November 12, 2020, 05:56

Set molecular viscosity to zero (small?) in transportProperties?

ishan_ae · November 12, 2020, 06:02

Wouldn't setting of Sutherland coefficients to 0 do the job ?

ishan_ae · November 12, 2020, 08:36

I am running right now the case with the above mentioned conditions(mu set to 1e-9, Pr = 0.85) and I am noticing that the pressure in the system is not being updated.

It has been only 9 iterations but shouldn't the pressure also be calculated ?

I am monitoring the pressure and the velocity at the outlet patch(where mass flow rate is imposed) and while the velocity changes, the pressure doesn't. The pressure value is the same with which it was initialized.

Not sure what is going wrong.

November 12, 2020, 05:19	Inviscid compressible flow using rhoSimpleFoam	#1
ishan_ae Member ishan Join Date: Oct 2017 Posts: 78 Rep Power: 9	Hello. Is it possible to setup inviscid compressible simulation using rhoSimpleFoam ? I made the following changes to my setup to setup an inviscid case: slip walls instead of noSlip Sutherland coefficients set to zero in thermoPhysical file turbulence set to off in the turbulence file I have looked in the posts here but could not get complete information. Can someone please tell me should I make any more changes ?

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November 12, 2020, 05:56		#2
dlahaye Senior Member Domenico Lahaye Join Date: Dec 2013 Posts: 802 Blog Entries: 1 Rep Power: 18	Set molecular viscosity to zero (small?) in transportProperties?

November 12, 2020, 06:02		#3
ishan_ae Member ishan Join Date: Oct 2017 Posts: 78 Rep Power: 9	Wouldn't setting of Sutherland coefficients to 0 do the job ?

November 12, 2020, 08:36		#4
ishan_ae Member ishan Join Date: Oct 2017 Posts: 78 Rep Power: 9	I am running right now the case with the above mentioned conditions(mu set to 1e-9, Pr = 0.85) and I am noticing that the pressure in the system is not being updated. It has been only 9 iterations but shouldn't the pressure also be calculated ? I am monitoring the pressure and the velocity at the outlet patch(where mass flow rate is imposed) and while the velocity changes, the pressure doesn't. The pressure value is the same with which it was initialized. Not sure what is going wrong.