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DNS of compressible flow over rough surfaces with an adaptive WENO/CD scheme

DNS of compressible flow over rough surfaces with an adaptive WENO/CD scheme
DNS of compressible flow over rough surfaces with an adaptive WENO/CD scheme
In this study, Direct Numerical Simulation (DNS) of compressible flow over a set of smooth and rough surfaces is carried out in a turbulent channel flow configuration. The aim is to quantify the Hamas roughness function for different rough wall geometries under the effects of compressibility. For this study, a flow with bulk Reynolds number 6000 and Mach number 1:5 is considered. A level-set ghost-fluid method is used to represent the rough wall geometry. The rough surfaces considered are a grit-blasted sample, graphite and a manufactured sawtooth geometry with the same mean roughness height as the grid-blasted surface. It was found that the grit-blasted surface has the largest roughness function as compared to the other ones. Although the sawtooth and grit-blasted surfaces have the same mean roughness height, the difference in their roughness function suggests that other topological features of the rough surface can influence the roughness function independently of the mean roughness height.
Direct numerical simulation, rough wall flows, compressible turbulence
Tan, Raynold
c4070330-043a-420a-97fe-3d18142b6087
Sandham, Neil
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Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314
Tan, Raynold
c4070330-043a-420a-97fe-3d18142b6087
Sandham, Neil
0024d8cd-c788-4811-a470-57934fbdcf97
Deiterding, Ralf
ce02244b-6651-47e3-8325-2c0a0c9c6314

Tan, Raynold, Sandham, Neil and Deiterding, Ralf (2022) DNS of compressible flow over rough surfaces with an adaptive WENO/CD scheme. 33rd Parallel CFD International Conference, , Alba, Italy. 25 - 27 May 2022. 4 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

In this study, Direct Numerical Simulation (DNS) of compressible flow over a set of smooth and rough surfaces is carried out in a turbulent channel flow configuration. The aim is to quantify the Hamas roughness function for different rough wall geometries under the effects of compressibility. For this study, a flow with bulk Reynolds number 6000 and Mach number 1:5 is considered. A level-set ghost-fluid method is used to represent the rough wall geometry. The rough surfaces considered are a grit-blasted sample, graphite and a manufactured sawtooth geometry with the same mean roughness height as the grid-blasted surface. It was found that the grit-blasted surface has the largest roughness function as compared to the other ones. Although the sawtooth and grit-blasted surfaces have the same mean roughness height, the difference in their roughness function suggests that other topological features of the rough surface can influence the roughness function independently of the mean roughness height.

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Published date: 25 May 2022
Venue - Dates: 33rd Parallel CFD International Conference, , Alba, Italy, 2022-05-25 - 2022-05-27
Keywords: Direct numerical simulation, rough wall flows, compressible turbulence

Identifiers

Local EPrints ID: 458083
URI: http://eprints.soton.ac.uk/id/eprint/458083
PURE UUID: 6dffab3c-416c-4b14-8da9-fed86ad4f7db
ORCID for Neil Sandham: ORCID iD orcid.org/0000-0002-5107-0944
ORCID for Ralf Deiterding: ORCID iD orcid.org/0000-0003-4776-8183

Catalogue record

Date deposited: 28 Jun 2022 16:43
Last modified: 17 Mar 2024 03:39

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Contributors

Author: Raynold Tan
Author: Neil Sandham ORCID iD
Author: Ralf Deiterding ORCID iD

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