Partially Averaged Navier Stokes (PANS) Simulations on Turbulent Flows and Effective Comparasion against Large Eddy Simulations (LES)

Contents

• ABOUT
• KEYWORDS
• RESEARCH
• CODE
• SIMULATIONS

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ABOUT

This Research Work constitutes:

• Partially Averaged Navier Stokes (PANS) Model Implementation for turbulent flows.
• PANS Simulation on the "PitzDaily" case on OpenFOAM-5.x (pimpleFoam).
• Effective comparison between PANS Simulations and Large Eddy Simulations (LES).

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KEYWORDS

• Computation Fluid Dynamics (CFD)
• Partially Averaged Navier Stokes (PANS)
• PANS Modelling
• PANS Turbulence Model
• Large Eddy Simulations (LES)
• OpenFOAM-5.x

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RESEARCH

Partially Averaged navier Stokes (PANS) vs Large Eddy Simulations (LES) for Turbulent Flows:

• Researched the Partially Averaged Navier Stokes (PANS) model on Turbulent Flows.
• Implemented the PANS model using OpenFOAM-5.x (pimpleFoam) for the "PitzDaily" case.
• Implementation of PANS involved developing and validating numerical algorithms to simulate turbulent flows with improved accuracy and computational efficiency.
• Effectively compared the results of PANS simulations against Large Eddy Simulations (LES) based on the velocities of the flows.
• This comparative analysis provided valuable insights into the capabilities and limitations of PANS turbulence modelling approach in predicting flow behaviour.

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CODE

Partially Averaged Navier Stokes Simulation Code for OpenFOAM-5.x

Simulation Code:

• kEpsilonPANS.C
• kEpsilonPANS.H

where,

• kEpsilonPANS.H is the amalgamation of kEpsilon.H & PANS.H (kEpsilon.H + PANS.H), and
• kEpsilonPANS.C is the amalgamation of kEpsilon.C & PANS.C (kEpsilon.C + PANS.C)

PANS.H & PANS.C

• Custom written OpenFOAM-5.x code.
• Implementes the Partially Averaged Navier Stokes Equations on the Turbulence Model.

kEpsilon.H & kEpsilon.C:

• Standard OpenFOAM kEpsilon Files for Turbulence Model.

• kEpsilon.H

  • Source: https://www.openfoam.com/documentation/guides/latest/api/TurbulenceModels_2turbulenceModels_2RAS_2kEpsilon_2kEpsilon_8H_source.html
  • Documentation: https://www.openfoam.com/documentation/guides/latest/api/TurbulenceModels_2turbulenceModels_2RAS_2kEpsilon_2kEpsilon_8H.html

• kEpsilon.C

  • Source: https://www.openfoam.com/documentation/guides/latest/api/TurbulenceModels_2turbulenceModels_2RAS_2kEpsilon_2kEpsilon_8C_source.html
  • Documentation: https://www.openfoam.com/documentation/guides/latest/api/TurbulenceModels_2turbulenceModels_2RAS_2kEpsilon_2kEpsilon_8C.html

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SIMULATIONS

Partially Averaged Navier Stokes (PANS) Simulation compared against the Large Eddy Simulation (LES) for the "PitzDaily" case in OpenFOAM-5.x (pimpleFoam).

- PANS Simulation

- LES Simulation