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How to guaranty boundedness of an additional variable in the context of a SRS simulation?

- June 5, 2023 at 7:05 am
  
  FAQ
  Participant
  
  In the context of a SRS simulation a bounded second order discretization is very much recommended. Despite the boundedness of the scheme used, there is still a chance for over/undershoots of the AV. This might be critical in cases where a strict boundedness is required, e.g. reaction progress etc. EQUATION CLASS: av ADVECTION SCHEME: Option = Central Difference Bounded CDS = On CDS Bound = 0.25 END END The bounded discretization scheme can be triggered to bounded central difference (CDS Bound = 1) and to central differences (CDS Bound = 0). This parameter is allowed to vary locally in the field and might be set as a function of field variables, if required. In cases there are still over/undershoots visible, a variable clipping needs to be activated. Please note the argument ‘component bounds flag’ is required to be set, i.e. LIBRARY: ADDITIONAL VARIABLE: PV Option = Definition Component Bounds Flag = Yes Component Lower Bounds = 0.0 [ ] END END

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