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Wall-Layer Treatment Considering the Pressure Gradient for RANS Simulations of Turbulent Flows
Department of Hydraulics, Hydraulic Machinery and Environmental Engineering, University POLITEHNICA of Bucharest, Bucharest, Romania .
Department of Hydraulics, Hydraulic Machinery and Environmental Engineering, University POLITEHNICA of Bucharest, Bucharest, Romania .
Department of Hydraulics, Hydraulic Machinery and Environmental Engineering, University POLITEHNICA of Bucharest, Bucharest, Romania .
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0001-7599-0895
2019 (English)In: Proceedings of 2019 International Conference on ENERGY and ENVIRONMENT (CIEM), IEEE, 2019, p. 289-293Conference paper, Published paper (Other academic)
Abstract [en]

The paper presents two wall-treatments employed with the standard k-ε turbulence model together with their consequences on the estimation of the flow characteristics (separation zone, velocity distribution, adverse/favourable pressure gradient, wall shear stress) and simulation resources (time and computational power). The two wall-treatments were developed by Manhart (2008) and Duprat (2010). The results are compared to those obtained with the standard k-ε turbulence model and the k-ω SST turbulence model, using the numerical computation software Code_Saturne CFD. The test case considered for the numerical simulations is a 3D diffuser geometry with water as fluid which undergoes flow separation. The results show that the two wall-treatments lead to an improvement of the accuracy in the prediction of the separation zone. The required time and computational power are improved, compared to the k-ω SST turbulence model.

Place, publisher, year, edition, pages
IEEE, 2019. p. 289-293
Series
International Conference on ENERGY and ENVIRONMENT (CIEM)
Keywords [en]
adverse/favourable pressure gradient, CFD, diffuser, RANS simulations
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-78694DOI: 10.1109/CIEM46456.2019.8937633ISI: 000630902700061Scopus ID: 2-s2.0-85078299819OAI: oai:DiVA.org:ltu-78694DiVA, id: diva2:1426711
Conference
2019 International Conference on ENERGY and ENVIRONMENT (CIEM), 17-18 October, 2019, Timisoara, Romania
Note

ISBN för värdpublikation: 978-1-7281-1532-0, 978-1-7281-1533-7

Available from: 2020-04-27 Created: 2020-04-27 Last updated: 2024-03-07Bibliographically approved

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Cervantes, Michel

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