to add an equation of transport in the CFX

luisalva · October 27, 2009, 15:04

I need to place one equacion of trasnporte of an additional variable, somebody can say to me like placing a gradient of an additional variable in the CFX?

ghorrocks · October 28, 2009, 07:09

I don't understand what you are asking.

CFX supports additional variables with a convection/diffusion, or just diffusion or convection. I also supports some expression additional variables.

luisalva · November 23, 2009, 09:31

I need to place an equation of transport for an additional variable
the equation of transport of this additional variable is not an equation as it appears in the CFX, since they appear new terms that have q to be modeled

I want to know like placing in the CEL gradient of gradient of an additional variable
somebody can help me please

ghorrocks · November 23, 2009, 18:13

Quote:

new terms that have q to be modeled

What do you mean by this?

Gradients of additional variables are described in the CEL Expression language reference section of the documentation.

joey2007 · November 24, 2009, 03:11

- Define the additional variable - Define it as transport equation under domain fluid models - Define another additional variable - Set the second one as algebraic. - Set the value to gradient e.g Pressure.Gradient X - Use second variable as input forsource term

luisalva · November 26, 2009, 14:05

Thank you very much joey 2007 i feel good your idea about creating an additional variable and then put on a transport equation.
then, create a another variable and define it is an algebraic equation, in this Equation algebraic define an expression in which my source terms will be defined.
in order to place this I finish source I have q to go to the contour defined as entrance and to place in source

October 27, 2009, 15:04	to add an equation of transport in the CFX	#1
luisalva New Member Luis Enrique Alva Huapaya Join Date: Oct 2009 Posts: 7 Rep Power: 17	I need to place one equacion of trasnporte of an additional variable, somebody can say to me like placing a gradient of an additional variable in the CFX?

November 23, 2009, 09:31	Equation of transport	#3
luisalva New Member Luis Enrique Alva Huapaya Join Date: Oct 2009 Posts: 7 Rep Power: 17	I need to place an equation of transport for an additional variable the equation of transport of this additional variable is not an equation as it appears in the CFX, since they appear new terms that have q to be modeled I want to know like placing in the CEL gradient of gradient of an additional variable somebody can help me please

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October 28, 2009, 07:09		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	I don't understand what you are asking. CFX supports additional variables with a convection/diffusion, or just diffusion or convection. I also supports some expression additional variables.

November 24, 2009, 03:11		#5
joey2007 Senior Member Join Date: Mar 2009 Location: Europe Posts: 169 Rep Power: 17	- Define the additional variable - Define it as transport equation under domain fluid models - Define another additional variable - Set the second one as algebraic. - Set the value to gradient e.g Pressure.Gradient X - Use second variable as input forsource term

November 26, 2009, 14:05		#6
luisalva New Member Luis Enrique Alva Huapaya Join Date: Oct 2009 Posts: 7 Rep Power: 17	Thank you very much joey 2007 i feel good your idea about creating an additional variable and then put on a transport equation. then, create a another variable and define it is an algebraic equation, in this Equation algebraic define an expression in which my source terms will be defined. in order to place this I finish source I have q to go to the contour defined as entrance and to place in source