Species Specific Fields

hyperion · July 14, 2010, 15:06

Hi Foamers - Does anyone know if there is a utility or other method that would allow me to view results for individual species? Specifically, I would like to know velocity and density profiles for different species in a flow.

Also, does anyone know if there is a utility that outputs local Knudsen and Courant numbers (on a cell by cell basis)?

Thanks for any and all help.

hk318i · July 15, 2010, 06:26

Dear hypersion,

if you are modeling single phase flow, it is impossible to calculate the velocity and density of each species. To do that you should use the a momentum equation for each specie.
I think you are modeling something special not just single phase flow because you are asking about Knudsen number. It will be better to give a brief about your case.
Regards,
Hassan

hyperion · July 15, 2010, 15:53

Hi Hassan - Thanks for replying. I am trying to run the dsmcFOAM application. The case involves a vapor of one species expanding into low pressure inert gas of another species. I would like to know the velocity and density, or at least concentration, of the expanding gas. This is an application of rarefied gas dynamics, which is why I would also like to know local Knudsen numbers. Thanks again.

hk318i · July 15, 2010, 16:17

Unfortunately I have no experience with dsmcFoam. I felt that you are doing something like that but your title and question was not clear enough.
I think it is now clear and I hope some dsmc foamer will help you soon. :-)

Sadegh yousefi · May 2, 2018, 08:27

Hi.do you know about calculation cancentration species in dsmcfoam?

July 14, 2010, 15:06	Species Specific Fields	#1
hyperion Member Daniel Join Date: Jul 2010 Location: California Posts: 39 Rep Power: 15	Hi Foamers - Does anyone know if there is a utility or other method that would allow me to view results for individual species? Specifically, I would like to know velocity and density profiles for different species in a flow. Also, does anyone know if there is a utility that outputs local Knudsen and Courant numbers (on a cell by cell basis)? Thanks for any and all help.

May 2, 2018, 08:27	Concentration	#5
Sadegh yousefi New Member Sadegh Join Date: Nov 2017 Posts: 5 Rep Power: 8	Hi.do you know about calculation cancentration species in dsmcfoam?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
mass flow in is not equal to mass flow out	saii	CFX	12	March 19, 2018 05:21
Simulation of a single bubble with a VOF-method	Suzzn	CFX	21	January 29, 2018 00:58
Constant velocity of the material	Sas	CFX	15	July 13, 2010 08:56
PostChannel	maka	OpenFOAM Post-Processing	5	July 22, 2009 09:15
Two-Phase Buoyant Flow Issue	Miguel Baritto	CFX	4	August 31, 2006 12:02

July 15, 2010, 06:26		#2
hk318i Senior Member Hassan Kassem Join Date: May 2010 Location: Germany Posts: 242 Rep Power: 17	Dear hypersion, if you are modeling single phase flow, it is impossible to calculate the velocity and density of each species. To do that you should use the a momentum equation for each specie. I think you are modeling something special not just single phase flow because you are asking about Knudsen number. It will be better to give a brief about your case. Regards, Hassan

July 15, 2010, 15:53		#3
hyperion Member Daniel Join Date: Jul 2010 Location: California Posts: 39 Rep Power: 15	Hi Hassan - Thanks for replying. I am trying to run the dsmcFOAM application. The case involves a vapor of one species expanding into low pressure inert gas of another species. I would like to know the velocity and density, or at least concentration, of the expanding gas. This is an application of rarefied gas dynamics, which is why I would also like to know local Knudsen numbers. Thanks again.

July 15, 2010, 16:17		#4
hk318i Senior Member Hassan Kassem Join Date: May 2010 Location: Germany Posts: 242 Rep Power: 17	Unfortunately I have no experience with dsmcFoam. I felt that you are doing something like that but your title and question was not clear enough. I think it is now clear and I hope some dsmc foamer will help you soon. :-)