Euler Flow

PierceH · July 8, 2019, 15:50

I'm trying to run an aerofoil under inviscid flow conditions, however, when selecting the viscous regime to Inviscid, my solver fails to converge. This is a simple simulation with M=0.3. I know it is often discussed that you set flow to laminar and free slip, but this is not a truly inviscid simulation. Has anyone got experience with this?

fluid23 · July 9, 2019, 18:09

I believe that that the discretization of the Euler equations results in numerical diffusion/artificial viscosity. I don't have personal experience with this, but you might try changing the differencing scheme and/or order of the discretzation.

I did a little reading on Steve portal and it sounds like steady solutions are limited to up-wind scheme. You mgiht have to employ a transient solver to get different schemes. There are several options.

https://thesteveportal.plm.automatio...ed-in-STAR-CCM

July 8, 2019, 15:50	Euler Flow	#1
PierceH Member Pierce Join Date: May 2019 Posts: 40 Rep Power: 7	I'm trying to run an aerofoil under inviscid flow conditions, however, when selecting the viscous regime to Inviscid, my solver fails to converge. This is a simple simulation with M=0.3. I know it is often discussed that you set flow to laminar and free slip, but this is not a truly inviscid simulation. Has anyone got experience with this?

July 9, 2019, 18:09		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 18	I believe that that the discretization of the Euler equations results in numerical diffusion/artificial viscosity. I don't have personal experience with this, but you might try changing the differencing scheme and/or order of the discretzation. I did a little reading on Steve portal and it sounds like steady solutions are limited to up-wind scheme. You mgiht have to employ a transient solver to get different schemes. There are several options. https://thesteveportal.plm.automatio...ed-in-STAR-CCM PierceH and aero_head like this.

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