UDF code for porous media model

Rishabh0010 · March 6, 2020, 06:52

How to write UDF code for the porous media model equations in 2-d simulation of the porous wick

vinerm · March 6, 2020, 08:14

Could you elaborate little more on porous media model? Do you mean Carman-Kozeny or Ergun or some other? Do note that Fluent already incorporates a porous media model. You can use it for 2D as well as 3D.

Rishabh0010 · March 11, 2020, 07:34

Thank you, sir, for responding. In our model, we have considered the evaporation and condensation process simultaneously. We are simulating the porous wick in the loop heat pipe.

vinerm · March 11, 2020, 08:11

EC model is separate from porous media. You can use EC model and porous zone in a single case. What I do not understand is your requirement for a UDF. Since both are available within Fluent as inbuilt models, you might be able to directly use those.

However, as far as wick modeling is concerned, it is not easy. There is a considerable amount of physics with myriad of phenomena to be considered.

scorpian · August 4, 2020, 03:08

Quote:

Originally Posted by vinerm

Could you elaborate little more on porous media model? Do you mean Carman-Kozeny or Ergun or some other? Do note that Fluent already incorporates a porous media model. You can use it for 2D as well as 3D.

How to get the gradient of species mole fraction in fluent?

March 6, 2020, 06:52	UDF code for porous media model	#1
Rishabh0010 New Member Chahat Jain Join Date: Mar 2020 Posts: 2 Rep Power: 0	How to write UDF code for the porous media model equations in 2-d simulation of the porous wick

March 6, 2020, 08:14	Porous Media Model	#2
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 36	Could you elaborate little more on porous media model? Do you mean Carman-Kozeny or Ergun or some other? Do note that Fluent already incorporates a porous media model. You can use it for 2D as well as 3D. __________________ 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.

March 11, 2020, 08:11	EC model and porous media	#4
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 36	EC model is separate from porous media. You can use EC model and porous zone in a single case. What I do not understand is your requirement for a UDF. Since both are available within Fluent as inbuilt models, you might be able to directly use those. However, as far as wick modeling is concerned, it is not easy. There is a considerable amount of physics with myriad of phenomena to be considered. __________________ 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.

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March 11, 2020, 07:34		#3
Rishabh0010 New Member Chahat Jain Join Date: Mar 2020 Posts: 2 Rep Power: 0	Thank you, sir, for responding. In our model, we have considered the evaporation and condensation process simultaneously. We are simulating the porous wick in the loop heat pipe.