Use of High-Order Curved Elements for Direct and Large Eddy Simulation of Flow over Rough Surfaces

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. https://journals.ub.ovgu.de/index.php/techmech/article/view/2100

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Use of High-Order Curved Elements for Direct and Large Eddy Simulation of Flow over Rough Surfaces ; volume:43 ; number:1 ; year:2023 ; Technische Mechanik ; 43, Heft 1 (2023)

Contributors, Places and Time

• Creator: Cengiz, Kenan ; Kurth, Sebastian ; Wein, Lars ; Seume, Joerg R.

Further information

• DOI: 10.24352/UB.OVGU-2023-043
• URN: urn:nbn:de:101:1-2023021621150308424916
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 10:58 AM CEST