|February 5, 2014, 14:00||
Couple different additional variables
Join Date: Nov 2011
Posts: 40Rep Power: 6
is there a way to couple two or more additional variables (AV) with each other?
what i want to do is the following:
i calculated heat flux for all three directions (see Calculate heat flux direction) with an additional tensor type "vector" ... so i finally got q_x, q_y and q_z ...
now i want to calculate the gradient X of q_x like this :
but im not able to write an algebraic equation for this case ... the problem is to handle the two gradients ... this is my actual status :
(- Thermal Conductivity * Temperature.Gradient X).Gradient X
but this is not working ...
another idea is that i calculate in an AV tensor type "vector" (name GradQ) and use this AV later, i.e.
GradQ X.Gradient X
but this is not working, too ...
any good ideas?
|February 5, 2014, 15:37||
Join Date: Jun 2009
Posts: 372Rep Power: 10
I assume you got the heat flux vector by doing something similar to
ADDITIONAL VARIABLE: MyHeatFluxVector
Option = Vector Algebraic Equation
Vector xValue = - Thermal Conductivity * Temperature.Gradient X
Vector yValue = - Thermal Conductivity * Temperature.Gradient Y
Vector zValue = - Thermal Conductivity * Temperature.Gradient Z
Now you should be able to access the MyHeatFluxVector_x.Gradient X, and any of its components.
NOTICE the syntax to access the components of a vector AV. That is the syntax for AV vector components in the ANSYS CFX Solver. Unfortunately, in CFD-Post you will see MyHeatFluxVector X(Y/Z) instead.
Not sure what you are trying to do with these variables, but if you need them for post-processing only you should be able to do the same in CFD-Post and save you to rerun the case. Create a User Defined variable, and select Vector + Gradient.
Hope the above helps,
|Thread||Thread Starter||Forum||Replies||Last Post|
|emag beta feature: charge density||charlotte||CFX||4||March 22, 2011 10:14|
|additional variables' effect||ariel||CFX||9||April 2, 2008 00:41|
|user SUBROUTINE for additional variables||Tuks||CFX||0||November 8, 2005 03:09|
|Trimmed cell and embedded refinement mesh conversion issues||michele||OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ...||2||July 15, 2005 04:15|
|Replace periodic by inlet-outlet pair||lego||CFX||3||November 5, 2002 21:09|