Stationary Simulation of Shock Wave with Instationary Settings

matten · November 4, 2010, 09:38

Hi everbody,
I am not very keen in setting up Ansys Pre with the right configuration data like time step and duration.
I read that its quite common to calculate such problems with discrete equations of first order in accuracy.
Can anybody help me with the settings or with advice?
greetings

ghorrocks · November 4, 2010, 17:49

I do not understand your question. If you are asking how do you implement first order time and space schemes, then this can be set under the solver tab.

matten · November 5, 2010, 13:35

I want to simulate a stationary incoming flow to a truncated cone with supersonic inlet. I read that for stationary incoming flow with supersonic speed there is a disadvantage in the way of solving the differential equations (eliptical/hyperbolical). So its better to solve while using transient flow settings (just hyperbolic). But I am just interessted in the stationary solution of the problem so its suficient to use the equtions of first order. But I have no idea how to set up these things like time step and so on..

ghorrocks · November 5, 2010, 16:19

This FAQ describes what you are asking:

http://www.cfd-online.com/Wiki/Ansys...gence_criteria

November 4, 2010, 09:38	Stationary Simulation of Shock Wave with Instationary Settings	#1
matten New Member Join Date: Nov 2010 Posts: 2 Rep Power: 0	Hi everbody, I am not very keen in setting up Ansys Pre with the right configuration data like time step and duration. I read that its quite common to calculate such problems with discrete equations of first order in accuracy. Can anybody help me with the settings or with advice? greetings

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November 4, 2010, 17:49		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	I do not understand your question. If you are asking how do you implement first order time and space schemes, then this can be set under the solver tab.

November 5, 2010, 13:35		#3
matten New Member Join Date: Nov 2010 Posts: 2 Rep Power: 0	I want to simulate a stationary incoming flow to a truncated cone with supersonic inlet. I read that for stationary incoming flow with supersonic speed there is a disadvantage in the way of solving the differential equations (eliptical/hyperbolical). So its better to solve while using transient flow settings (just hyperbolic). But I am just interessted in the stationary solution of the problem so its suficient to use the equtions of first order. But I have no idea how to set up these things like time step and so on..

November 5, 2010, 16:19		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	This FAQ describes what you are asking: http://www.cfd-online.com/Wiki/Ansys...gence_criteria