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How to create constant q heater?

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Old   April 25, 2011, 17:30
Default How to create constant q heater?
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Scot Johnson
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In the chtMultiRegionFoam tutorials, the heaters have a hot face (such as the bottom of the T-shaped heater) set at constant temperature like 500K. Is it possible to make the heater have a constant output instead, such as 100 Watts? Thanks, Scot
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Old   April 26, 2011, 00:33
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Bjorn H. Hjertager
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Check out
http://www.cfd-online.com/Forums/ope...nsfer+boundary

rgds
Bjorn
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Old   April 26, 2011, 03:31
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Hi Scot,

at the moment there is no solver for this problem but quite a few people are working on that issue.

Check out http://www.cfd-online.com/Forums/ope...egionfoam.html

or search the forum for "heat source"

Regards,
Toni
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Old   April 26, 2011, 13:34
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Scot Johnson
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Thank you, Bjorn. I like the simplicity of your answer but as I have tried to implement it in /system/heater/changeDictionaryDict, the model runs fine but q is simply ignored. I cranked q up to 10,000W with no effect on T anywhere.

The code reads:
dictionaryReplacement {
T {
internalField uniform 293;
boundaryField {
".*" {
type compressible::turbulentTemperatureCoupledBaffleMix ed;
neighbourFieldName T;
K K;
heatSource power;
q uniform 10000;
value uniform 293; }}}

The stuff above "heatSource power" was already there and I get a crash if I remove any of it. Any idea why q is ignored? Thank you! Scot
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