Learning Forum

[aryal3]

I’m trying to simulate the oxidation reaction of solid carbon particles with FeO in a molten steel bath using the Discrete Phase Model (DPM) in ANSYS Fluent. However, there doesn’t seem to be a built-in option for this type of reaction in the default DPM settings.

I tried using the Combusting Particle model by defining: C as the combustible species, FeO as the oxidizing species, and Fe as the product species.

However, the simulation doesn’t perform as expected. The reaction doesn’t seem to occur correctly, and the results are not correct.

How to model heterogeneous solid–liquid reactions like C + FeO → Fe + CO using DPM in Fluent? Would this require a user-defined function (UDF) or a modification of the existing DPM reaction framework?

Any suggestions or examples would be greatly appreciated.

[Ren]

The combusting particle model was originally designed for coal combustion but I think the particle surface reaction model could work for your application. There are four main settings related to this model:

1.Activate the particle reaction option in the "Species Model" dialog box.

 

2. Select "multiple-surface-reactions" combustion model for the combusting particle:

3. Define the particle reaction in the mixture material, e.g.,

4. Define the particle composition in the injection input.

 

Please refer to the user guide for more details.

 

[aryal3]

I cannot select "multiple-combustion-reactions" combustion model for combusting particle.

Also, when I try to do "particle reaction" in the mixture material, I get this error and I cannot add solid species for the mixture.