A convergence study of solutions using two two-equation RANS turbulence models on a finite volume solver for structured grids
25 Jun 2018-
About: The article was published on 2018-06-25. It has received 4 citations till now. The article focuses on the topics: Solver & Finite volume method.
Citations
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TL;DR: FEST-3D is a modular CFD solver written in FORTRAN 90, designed to solve the compressible Favre-averaged Navier-Stokes equations using the finite-volume method on block-structured grids using MPI-based parallelization.
Abstract: FEST-3D is a modular CFD solver written in FORTRAN 90, developed with a similar motivation: to help solve problems of academic and engineering interest. This software is designed to solve the compressible Favre-averaged Navier-Stokes equations using the finite-volume method on block-structured grids using MPI-based parallelization. The modularity of the code makes it easy to implement a new method for flux reconstruction, or a turbulence model. It provides a large number of options for higher-order spatial and temporal discretization, along with the latest turbulence and transition models, which are not all available in other open-source CFD software. To illustrate, FEST-3D provides the latest one-equation γ transition model (Menter, Smirnov, Liu, & Avancha, 2015) and zero-equation BC transition model (Cakmakcioglu, Bas, & Kaynak, 2018). It also provides standard turbulence models: SA (Spalart & Allmaras, 1992) and SST (Menter, 1994), and the k-kL (Abdol-Hamid, Carlson, & Rumsey, 2016) turbulence model. As FEST-3D uses structured grids to solve fluid flow problems, higher-order methods of 3rd (Van Leer, 1979), 4th (Colella & Woodward, 1984), and 5th (Shu, 2003) order accuracy in space —for uniform grids —can be employed; this is difficult to achieve with solvers designed for unstructured grids and data-structures.
7 citations
TL;DR: In this article, the local correlation-based one-equation transition model is transformed into a zeroequation model, which provides an attractive choice in terms of quick implementation of a transition model in existing turbulent flow solvers with Menter's shear-stress transport (SST) turbulence model.
7 citations
15 Jun 2020
1 citations
TL;DR: In this article, a square root transformation is applied to the dependent variables of a k - ω turbulence model, and the transformed model greatly enhances the robustness and reliability of turbulent flow simulations on unstructured grids.
1 citations
References
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TL;DR: In this paper, two new two-equation eddy-viscosity turbulence models are presented, which combine different elements of existing models that are considered superior to their alternatives.
Abstract: Two new two-equation eddy-viscosity turbulence models will be presented. They combine different elements of existing models that are considered superior to their alternatives. The first model, referred to as the baseline (BSL) model, utilizes the original k-ω model of Wilcox in the inner region of the boundary layer and switches to the standard k-e model in the outer region and in free shear flows. It has a performance similar to the Wilcox model, but avoids that model's strong freestream sensitivity
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