UDF for Viscoelastic Fow in Fluent

skris2009 · May 10, 2010, 17:44

Hi All,

I'm trying to simulate flow of a highly shear thinningin Fluent. For this, I wrote a UDF to incorporate the Carreau-Yasuda model into Fluent.
However, for the second half of my masters thesis, I also need to evaluate the viscoelastic effects of the fluid. I would hate to go to Polyflow for this. (Partly coz I'm done with a major part of my thesis, and also coz I dont know Polyflow!)

Does anyone have a UDF for a viscoelastc fluid in Fluent? Maybe UCM model or PTT model? Any ideas will be appreciated. I have never written a complicated UDF before (I'm assuming this one is going to be complicated), so any help on this topic will be highly appreciated.

skris2009 · May 12, 2010, 02:03

35 views and no ideas yet!!!
I'm still looking for help, so if anyone has any ideas, I'm still open to suggestions and guidance. Thanks.

moisedion · September 20, 2011, 00:59

Can you share your procedure to model this shear thinning in FLUENT? I know that OpenFoam offers more option on shear thinning and viscoelastic modeling...
Thanks

May 10, 2010, 17:44	UDF for Viscoelastic Fow in Fluent	#1
skris2009 New Member Sowmya K Join Date: Nov 2009 Posts: 22 Rep Power: 17	Hi All, I'm trying to simulate flow of a highly shear thinningin Fluent. For this, I wrote a UDF to incorporate the Carreau-Yasuda model into Fluent. However, for the second half of my masters thesis, I also need to evaluate the viscoelastic effects of the fluid. I would hate to go to Polyflow for this. (Partly coz I'm done with a major part of my thesis, and also coz I dont know Polyflow!) Does anyone have a UDF for a viscoelastc fluid in Fluent? Maybe UCM model or PTT model? Any ideas will be appreciated. I have never written a complicated UDF before (I'm assuming this one is going to be complicated), so any help on this topic will be highly appreciated.

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May 12, 2010, 02:03		#2
skris2009 New Member Sowmya K Join Date: Nov 2009 Posts: 22 Rep Power: 17	35 views and no ideas yet!!! I'm still looking for help, so if anyone has any ideas, I'm still open to suggestions and guidance. Thanks.

September 20, 2011, 00:59		#3
moisedion New Member MOISE DION Join Date: Sep 2011 Posts: 8 Rep Power: 15	Can you share your procedure to model this shear thinning in FLUENT? I know that OpenFoam offers more option on shear thinning and viscoelastic modeling... Thanks