dsmc properties

hyperion · August 4, 2010, 03:12

Hi there fellow foamers - I have a few few questions:

1) some of the boundary conditions that need to be defined seem to conflict. Why would I need to define rhoM, rhoN, and dsmcrhoN at the boundaries. It seems like the defining just one would suffice since the /constants/dsmcProperties file defines things like molecular mass and nequivalentParticles. I know I can use keyword calculated, but when I have doen this in the tutorial case freespaceStream the simulation stops after the first write step (t=.oo1).

2) Has anyone been able to use netgenNeutralToFoam when running dsmc cases? My cases always crash at the dsmcInitialise step.

3) Is the force density (fD) boundary condition basically just a pressure specification?

That's it for now. Thanks for any and all help.

archymedes · August 19, 2010, 10:58

I've asked my self the same question ( point 1) and also if there is any ranking, so to say if two inputs are in conflict which one is preferred.

August 4, 2010, 03:12	dsmc properties	#1
hyperion Member Daniel Join Date: Jul 2010 Location: California Posts: 39 Rep Power: 16	Hi there fellow foamers - I have a few few questions: 1) some of the boundary conditions that need to be defined seem to conflict. Why would I need to define rhoM, rhoN, and dsmcrhoN at the boundaries. It seems like the defining just one would suffice since the /constants/dsmcProperties file defines things like molecular mass and nequivalentParticles. I know I can use keyword calculated, but when I have doen this in the tutorial case freespaceStream the simulation stops after the first write step (t=.oo1). 2) Has anyone been able to use netgenNeutralToFoam when running dsmc cases? My cases always crash at the dsmcInitialise step. 3) Is the force density (fD) boundary condition basically just a pressure specification? That's it for now. Thanks for any and all help. Kevin Cao likes this.

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August 19, 2010, 10:58		#2
archymedes Member Claus Schmitzer Join Date: Mar 2010 Posts: 30 Rep Power: 16	I've asked my self the same question ( point 1) and also if there is any ranking, so to say if two inputs are in conflict which one is preferred.