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cell field variable for electric current density |
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January 19, 2018, 16:12 |
cell field variable for electric current density
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#1 |
New Member
RJC
Join Date: Jun 2015
Posts: 18
Rep Power: 11 |
I need to write a UDF for a heat source which is a function of electric current.
What is the cell field variable for electric current density? I did not find anything in UDF manual. Thanks in advance. |
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January 19, 2018, 16:42 |
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#2 |
New Member
RJC
Join Date: Jun 2015
Posts: 18
Rep Power: 11 |
I have activated the electric potential model in fluent which allows me add joule heating and electric potential in the model. However, I need to add additional heat source which is a function of electric current. What I understand from fluent manual is that I need to write a UDF using the define_source macro. but to write my equation in that UDF, I need to know the cell field variable for current density which I did not find in the manual.
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January 21, 2018, 21:17 |
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#3 |
Senior Member
Alexander
Join Date: Apr 2013
Posts: 2,363
Rep Power: 34 |
If your are talking about Single-Potential Battery Model, you may find source for that model in fluent files, by default the path is:
C:\Program Files\ANSYS Inc\v182\fluent\fluent18.2.0\addons\battery\src in file battery.h you may find information about UDF variables: Code:
enum { CURRENT = 0, /* 0 */ CURR_X, CURR_Y, CURR_Z, CURR_M, /* Magnitude of current density vector */ OHMIC_SOURCE, ECHEM_SOURCE, ACTIVATION, DISCHARGE_DEPTH, U_FUNC, Y_FUNC, VOLTAGE_JUMP, RESIST_EFF, OTHER, NO_OF_UDMS /* 14 */ }; Best regards |
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January 22, 2018, 14:13 |
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#4 |
New Member
RJC
Join Date: Jun 2015
Posts: 18
Rep Power: 11 |
Thanks a lot for your reply.
I assume the UDM index of Battery module would be different from other modules. For my model, I either have to use the MHD module or the electric potential model available in fluent 17.2. Unfortunately, I could not find a similar .c or .h source file for MHD module in MHD module directory. |
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July 3, 2018, 17:57 |
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#5 |
New Member
Paul Lee
Join Date: Jun 2018
Location: Vancouver
Posts: 14
Rep Power: 8 |
Did you find the cell variable for electric current density?
i'm writing a UDF for galvanic corrosion rate and would like to call the electric current for each cell to calculate the corrosion rate. and as a general question, is there a list somewhere the available cell variable one can retrieve using the "real" command? |
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current density, potential electric, udf code |
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