LORINI, Marco; BASSI, Francesco; COLOMBO, Alessandro; GHIDONI, Antonio; NOVENTA, Gianmaria

doi:10.1016/j.compfluid.2020.104767

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LORINI, Marco
Certified Adaptive discRete moDels for robust simulAtions of CoMplex flOws with Moving fronts [CARDAMOM]

BASSI, Francesco
Università degli Studi di Bergamo = University of Bergamo [UniBg]

COLOMBO, Alessandro
Università degli Studi di Bergamo = University of Bergamo [UniBg]

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Computers and Fluids. 2021-01, vol. 214, p. 104767

Elsevier

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Transition modelling represents a key ingredient for improving the performance predictions of many industrial applications. Among transition models, local formulations seem to guarantee better robustness, accuracy and easiness of implementation in modern CFD solvers. These models have been proposed in the finite volume context to predict the laminar-turbulent transition, but only few attempts have been made in the high-order framework. In this paper a new phenomenological transition model based on the concept of laminar kinetic energy has been proposed and implemented in a high-order accurate Discontinuous Galerkin code, named MIGALE. The transition model is validated and assessed by computing the transitional flow around flat plates with zero/adverse pressure gradients and through different turbine nozzles (T106A and LS89) for different values of Reynolds number and turbulence intensity. The computed results have been compared with experimental data and reference numerical solutions.< Leer menos

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RANS equations

Discontinuous Galerkin

Laminar kinetic energy

Natural transition

Bypass transition

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Discontinuous Galerkin solution of the RANS and kL − k − log (ω) equations for natural and bypass transition

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