Heating Source

FrankW · February 17, 2021, 05:23

I have an electric resistance heater. First of all, I simply approximated this as an imprinted heat output. Unfortunately, I have found that there is probably a temperature dependency that cannot be neglected. Is there a simple way of making the impressed power dependent on the temperature?
I am currently using a subdomain with a heat source as a heater.

regards
Frank

evcelica · February 17, 2021, 15:50

Sure. Just make volumetric heat a function of temperature using the CFX expression language or a user function:
VolHeatExample = 100[W/m^3] + 5[W/m^3/K]*T.
You could also use an electric model, and have variable electrical resistance, and define a current or voltage on the conductor ends (see tutorials).

FrankW · February 18, 2021, 03:27

Thanks for the tip. I also came up with this type of solution yesterday. I wanted to avoid the electric model because of the effort involved.

February 17, 2021, 05:23	Heating Source	#1
FrankW Member Frank Weise Join Date: Mar 2009 Location: Germany Posts: 57 Rep Power: 18	I have an electric resistance heater. First of all, I simply approximated this as an imprinted heat output. Unfortunately, I have found that there is probably a temperature dependency that cannot be neglected. Is there a simple way of making the impressed power dependent on the temperature? I am currently using a subdomain with a heat source as a heater. regards Frank

February 17, 2021, 15:50		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,196 Rep Power: 24	Sure. Just make volumetric heat a function of temperature using the CFX expression language or a user function: VolHeatExample = 100[W/m^3] + 5[W/m^3/K]*T. You could also use an electric model, and have variable electrical resistance, and define a current or voltage on the conductor ends (see tutorials). aero_head likes this.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[swak4Foam] Installation Problem with OF 6 version	Aurel	OpenFOAM Community Contributions	14	November 18, 2020 17:18
[foam-extend.org] Problems installing foam-extend-4.0 on openSUSE 42.2 and Ubuntu 16.04	ordinary	OpenFOAM Installation	19	September 3, 2019 19:13
[Other] Adding solvers from DensityBasedTurbo to foam-extend 3.0	Seroga	OpenFOAM Community Contributions	9	June 12, 2015 18:18
[swak4Foam] swak4foam building problem	GGerber	OpenFOAM Community Contributions	54	April 24, 2015 17:02
Problem compiling a custom Lagrangian library	brbbhatti	OpenFOAM Programming & Development	2	July 7, 2014 12:32

February 18, 2021, 03:27		#3
FrankW Member Frank Weise Join Date: Mar 2009 Location: Germany Posts: 57 Rep Power: 18	Thanks for the tip. I also came up with this type of solution yesterday. I wanted to avoid the electric model because of the effort involved.