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resistivity plotting



Hi

I am running a stationary model of a wire network usinf Electric currents and Heat transfer in solids . Each copper

wire (linearised reistivity) has a constant current. There are heat losses to the air and heat conducted between

wires at their junctions.

There is a resultant temperature gradient along each wire. How can I get a plot of the variation in resistivity?

I see uniform heat losses along the wire even though the temperature varies (and therefore resistance should vary)

Something seems to be working because temperatures are a bit lower with constant conductivity model.

Thanks

David

1 Reply Last Post 7 May 2013 07:53 GMT-04:00
Posted: 4 years ago 7 May 2013 07:53 GMT-04:00
Hi

to enhance the thermal cooling, if done with convective cooling, is to run once with a large "h[W/m^2/K]" value i.e. 100x what you expect

To plot the resistivity, its normally the material value, with a call to the temperature, something like material.

You could also consider using the JH physics (Joule heating) which combines both EC and HT pre-cooked for you.

--
Good luck
Ivar
Hi to enhance the thermal cooling, if done with convective cooling, is to run once with a large "h[W/m^2/K]" value i.e. 100x what you expect To plot the resistivity, its normally the material value, with a call to the temperature, something like material. You could also consider using the JH physics (Joule heating) which combines both EC and HT pre-cooked for you. -- Good luck Ivar

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