Learning Forum

[SilverRD]

Hello,

May I kindly ask for your help. I am doing a simulation for an ejector the details are...

Solver: Density based.

Model: Transition SST (4 eqn)

Material properties: R1234ze (Density, Cp, thermal conduction, viscosity > real gas - nist).

Formulation: Implicit

Flux Type: Roe-FDS

Spatial Discretization

Gradient: Least Squares Cell Based

 Flow: Third-Order MUSCL

 Turbulent Kinetic Energy: Third-Order MUSCL

 Specific Dissipation Rate: Third-Order MUSCL

  Intermittency: Third-Order MUSCL

  Momentum Thickness Re: Third-Order MUSCL

do i need to run the simulaiton more than 42250 times?

 

[SRP]

 

 

Hi,

I suggest you to try FMG initilization. Flow convergence can be accelerated if a better initial solution is used at the start of the calculation. The Full Multigrid initialization (FMG initialization) can provide this initial and approximate solution at a minimum cost to the overall computational expense. other you can try using real gas property table (RGP). 

You can refer to fluent user’s guide for more on FMG initilization: 33.10. Full Multigrid (FMG) Initialization (ansys.com)

Thank you

 

 

[SilverRD]

Hello! Is there any way to open the link you provided?

[SRP]

Hi,

Please refer to this forum discussion: Using Help with links (ansys.com)

Hope this helps you.

Thank you.

[SilverRD]

Hi! I followed your suggestion to use fmg initialization. however, there are some error. May i kindly ask how to fix these errors?

[SRP]

Hi,

Such error mostly occur due to bad mesh. Can you please share your mesh statistics?

Thank you.