Learning Forum

[sadhurajesh]

[Rob]

I assume the two flow domains aren't supposed to be connected? Ie the nanofluid isn't mixing with the air?

[sadhurajesh]

I don't know both fluids are mixing or not. But while I am trying for convergence using fluent solver, I am getting floating-point exception and continuity diverging

[Rob]

You need to decide if the fluids should or shouldn't mix. That determines whether you need to include multi phase models. What is the mesh quality?

[sadhurajesh]

fluids should not mix. these are mesh qualities below

[Rob]

OK, so you need to rethink the geometry so that the two streams can't mix. You also need to find where the highly skewed cells are and sort those out: 0.99999 skew is essentially flat, and will cause the solver to fail.

[sadhurajesh]

how to sort out highly skewed cells

[Rob]

It depends on what's causing them. It could be changes to geometry or cell sizing.