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Old   March 29, 2010, 14:18
Default combusting particle definition
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Hi! I have a quick question about defining combusting particles in the DPM model. If wet combustion is turned on, when defining the material properties of combustion particles, should the fractions of volatiles/combustibles on dry basis or wet basis? And the devolatilization temperature, should it be the water boiling point temperature or the temperature for the onset of particle devolatilization reaction?

Thanks in advance!
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Old   March 29, 2010, 17:26
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Quote:
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should the fractions of volatiles/combustibles on dry basis or wet basis?
You would suppose (meaning I don't know for sure) that is should be based on wet conditions...
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Old   March 30, 2010, 14:27
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Many thanks for the reply. Any more comments on this?
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Old   July 19, 2012, 06:37
Unhappy modelling combustion fluel
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Hai everybody, i have problem how to modeling temperature combustion biomass fuel using fluidized bed? Please help me
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Old   July 20, 2012, 06:02
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Quote:
Originally Posted by bjcfd View Post
Hi! I have a quick question about defining combusting particles in the DPM model. If wet combustion is turned on, when defining the material properties of combustion particles, should the fractions of volatiles/combustibles on dry basis or wet basis? And the devolatilization temperature, should it be the water boiling point temperature or the temperature for the onset of particle devolatilization reaction?

Thanks in advance!
If wet combustion is turned on, you should use volatiles/combustibles on dry basis. please see eq. 16-134 Fluent Theory guide. Liquid fraction (in wet combustion tab) should be defined as volume fraction, volatiles/combustibles (in materials tab) - as mass fraction.
If you hesitate, check the mass balances.

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