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› Forums › OpenLB › General Topics › High Prandtl numbers › Reply To: High Prandtl numbers

March 9, 2023 at 11:45 pm #7297
ramirofreile
Participant

Hi Fedor,

Thank you for your reply on this.
I am doing exactly what you recommend, keeping the lattice u at 0.1 and adding an extra tau_advection as a function of tau_fluid and turbulent Pr number. I have also tried refining the mesh of course.

I feel like the double distribution formulation hits a limit at a sufficiently high Reynolds number. For example, at a Re 10,000 it is very hard to simulate Prandtl numbers around 10. The thermal field gets too unstable.

Thank you,

Ramiro Freile