Learning Forum

[N. M.]

Hello everyone.

When discussing the mixing of different fluids, what distinguishes an approach utilizing the Multiphase model from one employing the Species Transport model?

Upon reviewing some tutorials, I observed that some individuals disable the Multiphase option and opt for the Species Transport model. In this scenario, they specify the type of mixing (e.g., hydrogen-air) and configure the inlet such that only one species exits from it (e.g., hydrogen).

Conversely, in other instances, the Multiphase option is enabled while the Species Transport option is disregarded.

What sets these two approaches apart?

I need to simulate a scenario in which hydrogen is injected at high velocity into an environment filled with air. Which approach is more appropriate, and why?

Thank you ????

[Rob]

Read this as a starting point.  /forum/forums/topic/modeling-humidity/

[N. M.]

Thank you Rob.
I've just read the conversation you mentioned. In my scenario, I believe that air and gaseous hydrogen can easily mix, so the species transport model should be suitable.

[Rob]

Yes, that would be a good choice. 

[N. M.]

Ok, thank you for the clarifications.

[Rob]

Make sure you use sufficient mesh resolution to capture the species and velocity gradients.