[Weiqiang Liu]

Hi all,

I am doing a solid soot cake combustion with fluent. External soot mass is added into fluid because of reaction. Therefore I have mass source term in the model.

My confusion is do I need to define momentum source for this mass source. Because I know generated mass source will be accelerated by cell averaged momentum. If I don't define momentum source for my mass source, velocity field would be different, right?

If I need to define momentum source, how can I define this momentum source?
My idea is :

x Momentum source= mass source * cell volume* x velocity

y Momentum source= mass source * cell volume* y velocity

Am I right?

Best regards

Weiqiang