[sixgod]

I plan to use fluent to do a simulation of magnetic fluid power generation, which needs to be written through udf, but there is no reference file, so I can't write it. Can someone please give me some guidance?
Thank you！！！

[AlexanderZ]

search for published papers regarding this topic.

you may need to control momentum and sources through UDF
read ansys fluent customization manual

[sixgod]

Originally Posted by AlexanderZ

search for published papers regarding this topic.

you may need to control momentum and sources through UDF
read ansys fluent customization manual

Thank you. I have also read related papers to add Lorenz force source term to momentum equation and Joule heat source term to energy equation, but I am not sure how to write the corresponding udf

[thedal]

This is what I have been doing for modelling source terms. So, I hope this helps.

1. First Find any DEFINE_SOURCE () example UDF from UDF Manual and see if you can properly compile and load it just to learn how to work with UDFs.

2. Once your source term is known from your literature, break them down into variables that are accessible from the UDF Data access macros.

3. If the source term contains gradients of inaccessible variables, Set the variable up as UDS (through DEFINE_ADJUST) and access its gradient from UDSI_G.

[sixgod]

Originally Posted by thedal

This is what I have been doing for modelling source terms. So, I hope this helps.

1. First Find any DEFINE_SOURCE () example UDF from UDF Manual and see if you can properly compile and load it just to learn how to work with UDFs.

2. Once your source term is known from your literature, break them down into variables that are accessible from the UDF Data access macros.

3. If the source term contains gradients of inaccessible variables, Set the variable up as UDS (through DEFINE_ADJUST) and access its gradient from UDSI_G.

thank you very much !!!