Cengiz, K.; Kurth, S.; Wein, L.; Seume, J.R.: Use of High-Order Curved Elements for Direct and Large Eddy Simulation of Flow over Rough Surfaces. In: Technische Mechanik 43 (2023), Nr. 1, S. 38-48. DOI: https://doi.org/10.24352/ub.ovgu-2023-043
Abstract: | |
In the present study, the curved element capabilities of a high-order solver are scrutinized for use in scale-resolving simulations regarding roughness. The approach devised not only suggests a plausible way to adopt a body-fitted grid approach as an alternative to immersed boundary method (IBM), but also enables performing LES instead of DNS without under-resolving the roughness. The method is first tested using various polynomial degrees. Then, it is validated against reference DNS-IBM results from a rough channel flow setup having various Reynolds numbers corresponding to the entire roughness range. The results confirm the validity of the new approach. Finally, a highly loaded low-pressure turbine cascade is simulated under LES resolution with and without the roughness patch. Although a rougher surface is needed for producing a more pronounced impact on the flow, the viability of this method also for pressure-gradient boundary layers is proven. | |
License of this version: | CC BY-SA 4.0 Unported |
Document Type: | Article |
Publishing status: | publishedVersion |
Issue Date: | 2023 |
Appears in Collections: | Fakultät für Maschinenbau |
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