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UDF diffusivity in Battery MSMD model

- April 25, 2024 at 1:31 pm
  
  Harsh Lakkalkatti
  Subscriber
  
  Hello,
  
  I have been trying to use the battery MSMD model (I'm using Ansys 2023R1) for my LFP 32700 cell. I have been referring to this YouTube series. I have a doubt regarding the material properties. In this video, which uses an older version of Ansys, there is a separate parameter called UDS diffusivity in kg/m-s units. However, in 2023R1, it lies under the electrical conductivity option, but in a completely different unit, S/m.
  
  My UDS diffusivity in older version was defined-per-uds in kg/m-s with the following values:
  uds-0 : 1.19e6
  uds-1 : 9.83e5
  
  Are these completely different things with different units? Can I put the values from previous versions in kg/m-s, into 2023R1 in S/m? Can someone please give me some clarity in terms of units, definitions, or conversions of the numbers (from kg/m-s to S/m, if any)?
  
  Thank you for your time.
- May 16, 2024 at 12:26 pm
  
  Murari Iyengar
  Ansys Employee
  
  Hi, you can look through Electrical Conductivity based on Diffusion Coefficients (aqion.de) for the relation between the two units.

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