Problem with a disk simulation

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Dear All,

 

i have a problem with a disk simulation. In the model the disk rotates at a concrete angular velocity and has a heat source.

 

The thing is that with the Spalart Allmaras turbulence equation the simulation converges, but not with the k-omega or SST turbulence equations.

 

To get that the simulation converge with Spalart Allmaras, it have been modified: Advanced Solution Strategy -> Stagger (flow, temperature, turbulence and Coupled temperature/flow), but I do not understand what this functions do and what are the most important terms to define there.

 

On the other hand i do not know why the simulation does not converge with SST an k-omega, can anybody help me?

 

Thanks.

 

(sorry for my english)

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Answers

  • ydigit
    ydigit
    Altair Employee
    edited May 2015

    SA model is more robust in terms of mesh requirements in AcuSolve. SST or Komega need a mesh with yPlus of ~1. That probably explains lack of convergence with two equation models.

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