Electric conductivity as a funcion of electric resistance

anpa05 · May 17, 2023, 16:40

Hi every body :

Hoping that everything is going well.

i need urgent help please.

-the electrical conductivity in my problem is not constant, it changes with electric resistance, and this electric resistance changes with temperature.

the electric resistance in my problem is given by 𝑅=𝑅_0 (1+𝛼(𝑇−𝑇_0)) where T_0 is 20C and T is static temperature of the wire. and R_0 is 11Ohm.

how can I write an expression to incorporate this resistance into the conductivity for aluminum in fluent. thanks

thanks

LuckyTran · May 17, 2023, 19:15

Conductivity is resistance divided by the length and then multiplied by the cross-sectional area of the wire.

Since you are using electrical conductivity, you're clearly not using the basic Fluent but one of the additional modules. Do you have an option for polynomial in temperature for conductivity? Or anything?

May 17, 2023, 16:40	Electric conductivity as a funcion of electric resistance	#1
anpa05 New Member anpi Join Date: Apr 2023 Posts: 1 Rep Power: 0	Hi every body : Hoping that everything is going well. i need urgent help please. -the electrical conductivity in my problem is not constant, it changes with electric resistance, and this electric resistance changes with temperature. the electric resistance in my problem is given by 𝑅=𝑅_0 (1+𝛼(𝑇−𝑇_0)) where T_0 is 20C and T is static temperature of the wire. and R_0 is 11Ohm. how can I write an expression to incorporate this resistance into the conductivity for aluminum in fluent. thanks thanks

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May 17, 2023, 19:15		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,675 Rep Power: 66	Conductivity is resistance divided by the length and then multiplied by the cross-sectional area of the wire. Since you are using electrical conductivity, you're clearly not using the basic Fluent but one of the additional modules. Do you have an option for polynomial in temperature for conductivity? Or anything?