heat of reaction on surface?

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  • Last Post 05 June 2019
Weiqiang Liu posted this 01 June 2019

Hi all,

I am doing a diesel catalytic combustion in micro-channel simulation with fluent. when I post-processed the result of heat of reaction on surface, I found that the unit of reaction heat fluent gave is W. I wonder the unit should be W per area, right? However I don't know what's the exact area unit, is it square meter or square millimeter? If It's millimeter, then the results are consistent with literature. If it's square meter, then my simulation results are much smaller than literature.

Best 

Weiqiang

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rwoolhou posted this 04 June 2019

Which post processing function did you use? I'd expect a unit of J/kg or similar why would there be an area component?

Weiqiang Liu posted this 04 June 2019

just post processing of fluent. Because it's a surface reaction heat. all the heat release and reaction rate are defined by per area.

best

abenhadj posted this 04 June 2019

Dimension is Watt.

Best regards, Amine

Goenitz posted this 04 June 2019

Hi all,

I am doing a diesel catalytic combustion in micro-channel simulation with fluent. when I post-processed the result of heat of reaction on surface, I found that the unit of reaction heat fluent gave is W. I wonder the unit should be W per area, right? However I don't know what's the exact area unit, is it square meter or square millimeter? If It's millimeter, then the results are consistent with literature. If it's square meter, then my simulation results are much smaller than literature.

Best 

Weiqiang

Hi

Does your reaction works even at zero reaction rate?

Weiqiang Liu posted this 04 June 2019

what do you mean?

Goenitz posted this 04 June 2019

Actually I was modelling fuel reformer reaction by defining my reaction in CFX. The reaction was taking place even at zero reaction rate. Just informing you to try different things like varying mixing rate, temperature or reaction rate that your model is really working.

Weiqiang Liu posted this 05 June 2019

yes, the reaction rate is not consistent with literature. however the species and temperature contour are very reasonable

Thanks very much for your concern

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