freeze momentum equations and solve just one equ

Ludwig Prandtl · September 21, 2016, 05:43

hi everyone
i have a question. i solve a model in steady state mode. it solved velocities and turbulence. now i want to solve it in transient mode and solve just a transport equation and not solve momentum and turbulence equations. (cuz of time)

can anybody tell me how to freeze solving momentum and turbulence models?i need these variables be fixed and cfx just solve a transport equation
thanks

Lance · September 21, 2016, 06:00

Hi Ludwig, I am big fan of your work.

Under expert parameters there is a tab called "Model Overrides". Set solve fluids and solve turbulence to f (false).

Ludwig Prandtl · September 21, 2016, 06:27

Quote:

Originally Posted by Lance

Hi Ludwig, I am big fan of your work.

Under expert parameters there is a tab called "Model Overrides". Set solve fluids and solve turbulence to f (false).

I'm a big fan of myself too

Thanks a lot. you helped so much.

Opaque · September 21, 2016, 14:04

Be careful when freezing equations, you can only do that if the solution of the new equation has no influence on the properties, or other quantities required to solve the frozen equations.

-Maxim- · September 26, 2016, 04:44

I am quite happy that Prandtl himself joined this forum. All our problems will be solved in no time now

September 21, 2016, 05:43	freeze momentum equations and solve just one equ	#1
Ludwig Prandtl New Member Join Date: Nov 2014 Posts: 18 Rep Power: 12	hi everyone i have a question. i solve a model in steady state mode. it solved velocities and turbulence. now i want to solve it in transient mode and solve just a transport equation and not solve momentum and turbulence equations. (cuz of time) can anybody tell me how to freeze solving momentum and turbulence models?i need these variables be fixed and cfx just solve a transport equation thanks

September 21, 2016, 06:00		#2
Lance Senior Member Lance Join Date: Mar 2009 Posts: 669 Rep Power: 22	Hi Ludwig, I am big fan of your work. Under expert parameters there is a tab called "Model Overrides". Set solve fluids and solve turbulence to f (false). Ludwig Prandtl likes this.

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September 21, 2016, 14:04		#4
Opaque Senior Member Join Date: Jun 2009 Posts: 1,880 Rep Power: 33	Be careful when freezing equations, you can only do that if the solution of the new equation has no influence on the properties, or other quantities required to solve the frozen equations.

September 26, 2016, 04:44		#5
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	I am quite happy that Prandtl himself joined this forum. All our problems will be solved in no time now