Multiphase + Solar Radiation Model need to speed up the calculations

- March 5, 2021 at 6:34 am
  
  Muhamad Eldebawy
  Subscriber
  
  Hi everyone, nI try to model solar collector that capture sun energy to get steam. nMy issue is that I use solar load model + Do Model for radiation and multiphase model.nI need to run the simulation for hours during different days but it is difficult as the multiphase require very small time step around 0.005 second to keep the solution stable !nI am wondering if there is any idea to speed up the calculations ?nThanks a lotn
- March 5, 2021 at 7:35 am
  
  DrAmine
  Ansys Employee
  
  Which multiphase model is used?n
- March 6, 2021 at 8:24 am
  
  Muhamad Eldebawy
  Subscriber
  
  VOF sharp interface n
- March 6, 2021 at 12:28 pm
  
  YasserSelima
  Subscriber
  
  NITA is faster.n
- March 9, 2021 at 12:47 am
  
  Muhamad Eldebawy
  Subscriber
  
  Thank you guys appreciate your helpn
- March 9, 2021 at 10:42 am
  
  DrAmine
  Ansys Employee
  
  Be aware that NITA should be used only if ITA is first of all running but requires several iterations to converge. We also added a sort of hyribd NITA which requires more efforts than NITA but is more stable and it shows a lot of computational efforts saving compared to ITA when dealing with weak to moderate coupled cases ( low to moderate anisotropic cases)n
- March 9, 2021 at 6:50 pm
  
  Muhamad Eldebawy
  Subscriber
  
  Thanks DrAmine n

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