On the Modelling of Roughness Effects on the Transition of von K'arm'an Boundary-Layer Flow

Abstract

Laminar-turbulent boundary-layer transition over rough rotating disks is addressed by means of linear-stability analysis. Computational data from two frequently used roughness-modelling approaches are obtained as input data for the stability analysis. It is demonstrated that the data arising from the two different approaches are not compatible with each other. Nevertheless, the stability analysis predicts postponed transition for both approaches. Two main conclusions emerge. Firstly, a theoretical study is required to establish which particular characteristics of the input data set result in the linear-stability analysis predicting postponed transition. Secondly, to guide future simulations an experimental study is essential to determine which one of the roughness-modelling approaches, if either, can produce data in agreement with measurements.

Publication DOI: https://doi.org/10.1088/1873-7005/ae0af3
Divisions: College of Engineering & Physical Sciences > School of Computer Science and Digital Technologies > Applied Mathematics & Data Science
College of Engineering & Physical Sciences > Aston Fluids Group
College of Engineering & Physical Sciences > School of Computer Science and Digital Technologies
College of Engineering & Physical Sciences
Aston University (General)
Additional Information: As the Version of Record of this article is going to be / has been published on a gold open access basis under a CC BY 4.0 licence, this Accepted Manuscript is available for reuse under a CC BY 4.0 licence immediately.
Publication ISSN: 1873-7005
Data Access Statement: The data that support the findings are available within the article.
Last Modified: 06 Oct 2025 07:30
Date Deposited: 01 Oct 2025 08:52
Full Text Link:
Related URLs: https://iopscie ... 873-7005/ae0af3 (Publisher URL)
PURE Output Type: Article
Published Date: 2025-09-24
Accepted Date: 2025-09-23
Authors: Yapa, Gayani
Griffiths, Paul (ORCID Profile 0000-0002-2078-0118)
Garrett, Stephen (ORCID Profile 0000-0002-0671-160X)
Thomas, Peter

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Version: Accepted Version

License: Creative Commons Attribution


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