Implementation of a Lag Elliptic-Blending model for RANS equations in OpenFOAM

Authors

  • Eleonora Gajetti Politenico di Torino
  • Luca Marocco Politenico di Torino
  • Gianluca Boccardo Politenico di Torino
  • Antonio Buffo Politenico di Torino
  • Laura Savoldi Politenico di Torino

DOI:

https://doi.org/10.51560/ofj.v4.133

Keywords:

turbulence, RANS, k-epsilon Lag EB, Backward Facing Step, Pipe bend

Abstract

Turbulence modeling remains a significant challenge in Computational Fluid Dynamics. Achieving a balance between model accuracy and computational efficiency often leads to the widespread utilization of RANS (Reynolds Averaged Navier Stokes) turbulence models. The current study focuses on implementing the k−ε Lag Elliptic Blending turbulence model within OpenFOAM®. This extension of the conventional k−ε model introduces an elliptic equation to handle non-uniform behavior near walls and a transport equation to account for the lag between stress and strain tensors. Comparison of results from two benchmark cases with those obtained from the commercial software STAR-CCM+®, which also includes the model, reveals good agreement between the two codes. Consequently, the implementation can be considered verified.

Published

2024-07-24

How to Cite

Gajetti, E., Marocco, L., Boccardo, G., Buffo, A., & Savoldi, L. (2024). Implementation of a Lag Elliptic-Blending model for RANS equations in OpenFOAM. OpenFOAM® Journal, 4, 105–117. https://doi.org/10.51560/ofj.v4.133

Issue

Section

18th OpeFOAM® Workshop - 2023