artificial viscosity

Divyaprakash · February 24, 2015, 02:36

Is there a way to control the numerical dissipation in star ccm+ . I am solving for supersonic flow over a forward step, inviscid case. I get boundary layers like structures near the wall behind the step. I think it maybe due to artificial viscosity.

me3840 · February 24, 2015, 20:46

If you aren't using a 1st order scheme then you shouldn't have an issue with artificial viscosity, but there is a blended accuracy factor you can adjust to get a scheme in between 1st and 2nd order in the coupled solver.

February 24, 2015, 02:36	artificial viscosity	#1
Divyaprakash Member Divyaprakash Join Date: Jun 2014 Posts: 77 Rep Power: 13	Is there a way to control the numerical dissipation in star ccm+ . I am solving for supersonic flow over a forward step, inviscid case. I get boundary layers like structures near the wall behind the step. I think it maybe due to artificial viscosity.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Problem with divergence	TDK	FLUENT	13	December 14, 2018 07:00
Artificial Viscosity	Luiz Eduardo Bittencourt Sampaio	Main CFD Forum	12	November 13, 2011 11:21
Artificial viscosity	rads	CFX	2	July 31, 2006 08:02
artificial viscosity	rvndr	Main CFD Forum	1	March 2, 2004 11:24
Artificial Viscosity	Girish Bhandari	Main CFD Forum	5	January 13, 2001 14:22

February 24, 2015, 20:46		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 26	If you aren't using a 1st order scheme then you shouldn't have an issue with artificial viscosity, but there is a blended accuracy factor you can adjust to get a scheme in between 1st and 2nd order in the coupled solver.