|
[Sponsors] |
![]() |
![]() |
#1 |
New Member
SM
Join Date: Dec 2018
Posts: 19
Rep Power: 7 ![]() |
Hi,
Please let me know how to figure out the contours of expressions that I define. |
|
![]() |
![]() |
![]() |
![]() |
#2 |
Senior Member
Svetlana Tkachenko
Join Date: Oct 2013
Location: Australia, Sydney
Posts: 415
Rep Power: 14 ![]() |
How do you define the expression?
Can you define it as Custom Field Function? |
|
![]() |
![]() |
![]() |
![]() |
#3 | |
New Member
SM
Join Date: Dec 2018
Posts: 19
Rep Power: 7 ![]() |
Quote:
My question is how to get the contour graph of the defined expressions? For example, I tried to make a report on those variables or expressions, but the error messages were just pop up, 'expression is not single-valued,' or 'Syntax invalid.' |
||
![]() |
![]() |
![]() |
![]() |
#4 |
New Member
SM
Join Date: Dec 2018
Posts: 19
Rep Power: 7 ![]() |
In post-processing, the defined expressions can be set as the user-defined variables, which can allow users to generate contour graphs.
On the contrary, it looks like that Fluent (2019R3 ver.) helps define easy expressions alternative to UDF, but I have little knowledge in setting the expressions as the variables and graphing its contours. https://www.dropbox.com/s/6eaufffttn...Setup.png?dl=0 |
|
![]() |
![]() |
![]() |
![]() |
#5 |
Senior Member
|
Fluent Expressions Language is based on CFX Expression Language. CFX does not allow plotting of field expressions. You have to assign it to an additional variable to plot it. Its same in Fluent. Create a UDS and then assign the expression to UDS. Then you can plot UDS.
__________________
Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority. |
|
![]() |
![]() |
![]() |
![]() |
#6 | |
New Member
SM
Join Date: Dec 2018
Posts: 19
Rep Power: 7 ![]() |
Quote:
I finally found out that 'custom field function (CFF)' can lead to the contour graphing. Could you let me know which differences between CFF and expressions are? |
||
![]() |
![]() |
![]() |
![]() |
#7 |
Senior Member
|
CFF and expressions are pretty similar, however, when it comes to usage, expressions are more powerful. Expressions have been borrowed from CFX and can be used for purposes where CFF cannot be used, such as to apply a boundary condition profile or may be even a property.
__________________
Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority. |
|
![]() |
![]() |
![]() |
![]() |
#8 | |
New Member
SM
Join Date: Dec 2018
Posts: 19
Rep Power: 7 ![]() |
Quote:
|
||
![]() |
![]() |
![]() |
![]() |
#9 |
New Member
anvi
Join Date: Jun 2021
Posts: 2
Rep Power: 0 ![]() |
in fluent software : while iam adding material properties data in a piecewise-linear way:
Cannot plot expression: Expressions of type Unknown are currently not plottable. Only expressions of type Double are plottable. i found this error. Would you please anyone help me to clear this error ? |
|
![]() |
![]() |
![]() |
Tags |
expression, fluent |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Outlet boundary condition in interFoam | Andrea_85 | OpenFOAM Running, Solving & CFD | 51 | July 20, 2017 13:31 |
writing execFlowFunctionObjects | immortality | OpenFOAM Post-Processing | 30 | September 15, 2013 06:16 |
How to install CGNS under windows xp? | lzgwhy | Main CFD Forum | 1 | January 11, 2011 18:44 |
CGNS lib and Fortran compiler | manaliac | Main CFD Forum | 2 | November 29, 2010 06:25 |
Lift, Drag Vs time chart,calculations | Jamesd69climber | CFX | 8 | February 17, 2005 17:23 |