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Heat transfer problem in a two phase eulerian fluidized bed

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Old   July 26, 2016, 17:37
Smile Heat transfer problem in a two phase eulerian fluidized bed
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Hi everybody, I am working on a project on the modeling of a fluidized bed for feedstock gasification using the eulerian model on Fluent.

I implemented the reactions in the model (gasification and combustion) which seem to work fine and I can observe the endothermic behavior of the gasification processes and the exothermic one for the combustion processes.

My problem is : without any heat transfer between the solid and gas phase, the temperature increase around 1500K when there is combustion in the reactor. As soon as I turn on any heat transfer model between the two phases, say the Gunn model for example, there is almost no temperature increase with the same problem setting as before.

I know I have to model heat transfer in some way between the two phases but at the same time I would hope to see a significant temperature increase due to combustion. I have to finish my project soon, so any help would be very appreciated!

Thank you
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Old   August 24, 2018, 08:26
Default Gunn Model Heating
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Hello, I do have the same problem. In my case, there is a gas phase at 2100 C that is supposed to heat a granular phase, but there is not an increase in the temperature of the granular phase. I am using the Gunn model too. =/
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Old   December 15, 2018, 06:50
Default Fluidized bed simulation
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Hi my friends,
I am trying to simulate a thing like a fluidized by Fluent, I used the Eulerian model. My problem is as you can see in the figure some particles extract from bed and goes to outer, How can I fix this problem?
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Last edited by newton2009; December 16, 2018 at 05:30.
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combustion, eulerian, gasification, multiphase, reactor

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