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Normal current into cross section of 2D geometry
Posted Dec 7, 2016, 6:06 a.m. EST Low-Frequency Electromagnetics, Heat Transfer & Phase Change, Geometry, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.1 2 Replies
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Hi,
I'm doing a thermal simulation of electric power cables with the "Joule Heating Physics" module.
Till now I'm assuming a constant heat source to model the conduction losses.
I'm trying to use the "electric currents" node for defining a current that generates heat instead of
using a constant heat source till now. Maybe there is some way to insert a formula for conduction losses dependent on the flowing current and temperature?
I want to define a normal current into the cross section of the conductor.
So I'm working at the "x-y-plane" (the cross section) and I want to let the current flow through that cross section in z direction.
If anybody knows a way to do that please let me know.
Thanks !
Jan
I'm doing a thermal simulation of electric power cables with the "Joule Heating Physics" module.
Till now I'm assuming a constant heat source to model the conduction losses.
I'm trying to use the "electric currents" node for defining a current that generates heat instead of
using a constant heat source till now. Maybe there is some way to insert a formula for conduction losses dependent on the flowing current and temperature?
I want to define a normal current into the cross section of the conductor.
So I'm working at the "x-y-plane" (the cross section) and I want to let the current flow through that cross section in z direction.
If anybody knows a way to do that please let me know.
Thanks !
Jan
2 Replies Last Post Mar 18, 2017, 11:24 a.m. EDT
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Posted:
8 years ago
Joule heat is resistivity*(current density)².
Resistivity has the dimension Ohm*cm and current density A/cm². Their product is VA/cm^3 = W/cm^3. Use that as the heat source.
BR
Lasse
Resistivity has the dimension Ohm*cm and current density A/cm². Their product is VA/cm^3 = W/cm^3. Use that as the heat source.
BR
Lasse
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Posted:
8 years ago
Hi Jan,
did you solve the problem? I am doing the same. Have a cable crossection in 2D and want a normal current through it to simulate heat transfer to the cable surroundings.
Would be great if you could give me a hint! ;-)
Best, Madlen
did you solve the problem? I am doing the same. Have a cable crossection in 2D and want a normal current through it to simulate heat transfer to the cable surroundings.
Would be great if you could give me a hint! ;-)
Best, Madlen