Beta value in High Resolution scheme

gravis · May 10, 2010, 07:53

Hi all,

Is there any way to check what value $\beta$ is limited to for different equations at the integration points, like a mean value for each control volume? I have not found any such variable in CFX-Pre that can be included under Output control.

Best regards,
Reine

ghorrocks · May 10, 2010, 08:57

When you activate the high-res differencing scheme then -beta variables are available in CFD-Post automatically.

gravis · May 10, 2010, 10:16

Glenn, thank you for your reply.

I am using High Resolution for Continuity, Momentum, Energy and Mass Fraction. In CFX-Post, I can only see the variable "Energy and Mass Fractions.Beta". If this is one of the variables you mention, how come there are not separate $\beta$ values for Energy and Mass Fraction? (Also, why do I not see the corresponding variables for the remaining equations?)

/Reine

ghorrocks · May 10, 2010, 19:54

Yes, they are the variables I am talking about. I do not know why the energy equation and mass fraction equation uses the same beta.

gravis · May 11, 2010, 03:50

Thanks again.

Perhaps a bit off-topic for the CFX forum, but does anyone know if there are corresponding variabes available in Fluent (for the Standard Limiter in 2nd Order Upwind, with cell to face limiting), and the names of them?

May 10, 2010, 07:53	Beta value in High Resolution scheme	#1
gravis Member Reine Granström Join Date: Apr 2009 Location: Sweden Posts: 43 Rep Power: 17	Hi all, Is there any way to check what value $\beta$ is limited to for different equations at the integration points, like a mean value for each control volume? I have not found any such variable in CFX-Pre that can be included under Output control. Best regards, Reine

May 10, 2010, 10:16		#3
gravis Member Reine Granström Join Date: Apr 2009 Location: Sweden Posts: 43 Rep Power: 17	Glenn, thank you for your reply. I am using High Resolution for Continuity, Momentum, Energy and Mass Fraction. In CFX-Post, I can only see the variable "Energy and Mass Fractions.Beta". If this is one of the variables you mention, how come there are not separate $\beta$ values for Energy and Mass Fraction? (Also, why do I not see the corresponding variables for the remaining equations?) /Reine Last edited by gravis; May 11, 2010 at 11:28. Reason: Disregard the last question, the remaining beta's were actually available in the solution..

May 11, 2010, 03:50		#5
gravis Member Reine Granström Join Date: Apr 2009 Location: Sweden Posts: 43 Rep Power: 17	Thanks again. Perhaps a bit off-topic for the CFX forum, but does anyone know if there are corresponding variabes available in Fluent (for the Standard Limiter in 2nd Order Upwind, with cell to face limiting), and the names of them? Last edited by gravis; May 11, 2010 at 11:14.

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May 10, 2010, 08:57		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	When you activate the high-res differencing scheme then -beta variables are available in CFD-Post automatically.

May 10, 2010, 19:54		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	Yes, they are the variables I am talking about. I do not know why the energy equation and mass fraction equation uses the same beta.