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Problem with mhd udf

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Old   July 11, 2023, 00:15
Default Problem with mhd udf
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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?
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Old   July 11, 2023, 05:52
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search for published papers regarding this topic.

you may need to control momentum and sources through UDF
read ansys fluent customization manual
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Old   July 11, 2023, 05:58
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Quote:
Originally Posted by AlexanderZ View Post
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
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Old   July 22, 2023, 14:52
Default Source UDF?
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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.
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Old   July 23, 2023, 03:35
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Quote:
Originally Posted by thedal View Post
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 !!!
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