Enhancement of the performance of the partial-averaged Navier-Stokes method by using scale-adaptive mesh generation.

*(English)*Zbl 1346.76049
Kuzmin, Alexander (ed.), Computational fluid dynamics 2010. Proceedings of the 6th international conference on computational fluid dynamics, ICCFD6, St. Petersburg, Russia, July 12–16, 2010. Berlin: Springer (ISBN 978-3-642-17883-2/hbk; 978-3-642-17884-9/ebook). 333-339 (2011).

Summary: The Partially-Averaged Navier-Stokes (PANS) approach is a recently proposed method which changes seamlessly from Reynolds-Averaged Navier-Stokes (RANS) to the direct numerical solution of the Navier-Stokes equations (DNS) as the unresolved-to-total ratios of kinetic energy and dissipation are varied. The parameter which determines the unresolved-to-total kinetic energy ratio \(f_k\) is defined based on the grid spacing. The PANS asymptotic behavior goes smoothly from RANS to DNS with decreasing \(f_k\). In the work of B. Basara et al. [“PANS vs. LES for computations of the flow around a
3D bluff body”, in: Proceedings of ERCOFTAC 7th international symposium on engineering turbulence modelling and measurements, ETMM7, 2/3. Lymassol, Cyprus. 548–554 (2008)], it was shown that a dynamic update of the PANS key parameter \(f_k\) by changing at each point and at the end of every time step, is the promising approach to provide the optimum modeling on employed computational meshes. This work is extended here by introducing the adaptive local grid refinement which keeps in advance prescribed value of the parameter \(f_k\). The results show benefits of using such advanced numerical technique in conjunction with the PANS method.

For the entire collection see [Zbl 1216.76010].

For the entire collection see [Zbl 1216.76010].

##### MSC:

76F65 | Direct numerical and large eddy simulation of turbulence |

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\textit{B. Basara} and \textit{Z. Pavlovic}, in: Computational fluid dynamics 2010. Proceedings of the 6th international conference on computational fluid dynamics, ICCFD6, St. Petersburg, Russia, July 12--16, 2010. Berlin: Springer. 333--339 (2011; Zbl 1346.76049)

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