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-   -   keeping resolution of mesh in Dynamic mesh + Q about posprocessing the problem (http://www.cfd-online.com/Forums/fluent/87049-keeping-resolution-mesh-dynamic-mesh-q-about-posprocessing-problem.html)

M.Sc_Student April 10, 2011 07:10

keeping resolution of mesh in Dynamic mesh + Q about posprocessing the problem
 
Hi
I am simulating an unsteady periodic motion of an airfoil with pitch and plunge motion, and I have these questions regarding this problem:

1) how can I keep the resolution of mesh, by using dynamic mesh parameters? for instance how can I specify a maximum cell size in order to have all the new cells in the updated mesh below this size?

2) I want to compute the mean lift and drag coefficients, is it possible to do this with fluent? or for instance I want to normalize some forces by dividing them to an specific amount or compute the Cl/Cd ratio. how can I do this in fluent?

3) how can I write the data presented in fluent in an data file? lets say .txt

Thanks in advance

:cool:

Amir April 10, 2011 09:54

Hi,
Quote:

2) I want to compute the mean lift and drag coefficients, is it possible to do this with fluent? or for instance I want to normalize some forces by dividing them to an specific amount or compute the Cl/Cd ratio. how can I do this in fluent?
in surface->monitor->surface (or forces) you can write you desired data every time step and in another post processor find the mean value
Quote:

3) how can I write the data presented in fluent in an data file? lets say .txt
first export your data to tecplot and then open the saved file in a text editor.

M.Sc_Student April 10, 2011 10:09

Dear Amir
Thanks for your comment, I would really appreciate it if you could tell me How can I import data to Tecplot?
Thanks
Regards

Amir April 10, 2011 12:10

Quote:

Originally Posted by M.Sc_Student (Post 302966)
Dear Amir
Thanks for your comment, I would really appreciate it if you could tell me How can I import data to Tecplot?
Thanks
Regards

there are 2 ways for that:
1)
first export file from fluent to tecplot:
file->export->tecplot
then in tecplot:
file->load data files->tecplot data loader
2)
in tecplot:
file->load data files->fluent data loader : read your case and data

if you want to access your data e.g. in a txt file you can follow first procedure and then open the exported file in a text viewer or you can follow both procedures and after importing files in tecplot:
file->write data file ...


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