CUED Publications database

Large eddy simulations using high order flux reconstruction method on hybrid unstructured meshes

Lu, Y and Liu, K and Dawes, WN (2014) Large eddy simulations using high order flux reconstruction method on hybrid unstructured meshes. In: UNSPECIFIED.

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Abstract

Large eddy simulations using hybrid unstructured meshes are performed for different problems including external flows and internal flows. This code is based on a novel variant of high order flux reconstruction methods which is robust and efficient. Both implicit second order backward differentiation formula(BDF2) with nonlinear block LU-SGS as inner iterative and an explicit space-time method are implemented for unsteady timemarching. A prediction-correction type space-time method was introduced, which allows very efficient local time-stepping for unsteady simulations including LES. Time accuracy is ensured by the time-integration of correction flux under the space-time framework by using an extended continuous Runge-Kutta method. This method is smoothly combined with the high order flux-reconstruction discretization. The accuracy, efficiency and the potential to solve large-scale, real geometry problems of the new solver algorithm is demonstrated.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div A > Turbomachinery
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 18:59
Last Modified: 10 Aug 2017 01:37
DOI: