to add an equation of transport in the CFX
:confused::confused: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?:confused::confused::confused:

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. 
Equation of transport
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 
Quote:
Gradients of additional variables are described in the CEL Expression language reference section of the documentation. 
 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

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 
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