Procedure to use DDES Turbulence model

- June 7, 2023 at 9:47 am
  
  Sakun
  Subscriber
  
  Hi,
  As a part of my research project i need to simulate my high-speed single compressor blade simulation in DDES turbulance model. I do have a converged solution (attached picture) using steady-state RANS 2nd Order scheme and i would like to know, do i have to follow the same procedure as LES model as mentioned in the fluent user manual for the DDES as well.
  
  Thank you,
- June 7, 2023 at 7:46 pm
  
  Federico Alzamora Previtali
  Subscriber
  
  Hello,
  you should follow the DES procedure as per the manual 13.12. Setting Up the Detached Eddy Simulation Model (ansys.com)
  - June 8, 2023 at 8:43 am
    
    Sakun
    Subscriber
    
    Thank you very much for the reply,
    But according to the user manual there is a section how to initialize LES based simulations (13.19.5. LES-Specific Solution Strategies). So i am just wondering DDES based simulations also have to initialize like LES.
    - June 8, 2023 at 3:23 pm
      
      Federico Alzamora Previtali
      Subscriber
      
      For DDES, a standard steady-state RANS should be sufficient.
    - June 9, 2023 at 8:47 am
      
      Sakun
      Subscriber
      
      sorry i didnt get what you meant by "standard steady-state RANS for DDES" ☹

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