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-   -   Need some tips to model heat transfer (https://www.cfd-online.com/Forums/fluent/67724-need-some-tips-model-heat-transfer.html)

 Cjlaumans August 25, 2009 03:50

Need some tips to model heat transfer

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Hello everyone,

I'm trying to get the hang of fluent and at the moment I am trying to model a pan on a gas stove flame.
I'm starting out simple, going for a steady state solution meaning the pan temperature is fixed at 100 degrees C (boiling water). This pan is placed above a gas flame of about 1200 degrees C (just hot air, instead of considering reactions).
First I want to get a realistic solution without considering turbulence and radiation. But I'm already running into some questions that I was hoping you might be able to help me answer.

My estimate for the velocity of the gas flame is that it should be about 1m/s. However when I use this value, the solution doesn't look very realistic, the hot air is very localized (see first picture). I get a more realistic solution when I use 5 - 10 m/s for the inlet flame velocity (second picture), however I wouldn't know how I could justify using this value.
Anyone have any tips what I could try to get a realistic solution with 1m/s?

Also any tips for turbulence and radiation are welcome (for when I get to that).

Thanks!

Chris

p.s. Just an explanation of the picture: It is half of a pan (since it is symmetric) on top of a gas stove flame.

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