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.
| Original language | English |
|---|---|
| Article number | 055505 |
| Number of pages | 22 |
| Journal | Fluid Dynamics Research |
| Volume | 57 |
| Issue number | 5 |
| Early online date | 9 Oct 2025 |
| DOIs | |
| Publication status | Published - 9 Oct 2025 |
Bibliographical note
Copyright © 2025 The Author(s). Published by IOP Publishing Ltd on behalf of The Japan Society of Fluid Mechanics. Original Content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Data Access Statement
The data that support the findings are available within the article.Keywords
- rotating-disk flow
- boundary-layer transition
- roughness modeling
- linear-stability analysis