Abstract:
The algebraic structure-based turbulence model (ASBM) incorporates information about the structure of turbulence to provide closure to the Reynolds-averaged NavierStokes equations. In the past, the model has been applied to several well documented Computational Fluid Dynamic (CFD) benchmark test cases, showing reasonable improvement compared to standard turbulence models, but obtaining converged solutions is not always straightforward. We therefore revisit the functional form of the ASBM and evaluate the model over a range of mean deformations of homogeneous turbulence and compare the result with reference solutions using the Particle Representation Model (PRM). The performance of the model is assessed in detail and an improved ASBM is proposed. For a test case involving separated flow over a wall mounted hump the new modifications are noted to yield better agreement when compared to experimental measurements.