Learning Forum

[lucas.guaglardi.927]

Hello all,

 

I have a couple questions regarding Fluent.

 

1. Essentially, I create a large set of named expressions, many have to be repeated for each control volume.
   Then I create report definitions based on the named expressions and run the solution for 0 iterations to get the new outputs.
   Essentially, for a large number of control volumes, it takes a couple of hours to generate the outputs, even on an HPC. It takes a decent amount of time for the new named expressions to be imported, for the definitions to be created, then for the results to be output.
   I think there must be a better way to do this. Would using UDFs or PyFluent help?
2. I would like to generate control volumes around specific flow features, such as the corner separation.
   
1. What would be the best way to extract this and make a closed volume to perform integration through?
2. How can I calculate the normal of an arbitrary surface (I have been able to calculate the normal of surfaces generated through meshing but not Fluent surfaces)?

 

Thank you.

[Rob]

I'm not quite sure what you're doing. You can calculate values onto cells using Custom Field Functions and/or Expressions. Cell zones can be separated using Registers, with the values from the CFFs.  

[Rob]

And because the system keeps eating text.... 

A post processing surface doesn't have a normal as it's not a boundary facet. That's why we tend not to use mass flow results from iso-surfaces but would insteady use a function of velocity components and density.