A rational method for determining intermittency in the transitional boundary layer

Dhamotharan Veerasamy, Chris Atkin

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)
16 Downloads (Pure)


A new rational procedure is proposed for determining the intermittency in the streamwise direction. One of the key parameters for the intermittency determination is the selection of a threshold value, which often involves a certain level of subjectivity. Here, a reliable way of choosing the threshold value in a more objective manner is proposed. The proposed approach involves a single threshold value, equal to the magnitude of the maximum laminar perturbation in the transitional flow. The results obtained are validated with the widely used dual-slope method. In this paper, the measurements are carried out on an experimental arrangement, involving the interaction of an upstream aerofoil wake with a downstream flat plate boundary layer. As a by-product of the study, a scaling parameter has been identified which captures the length of the transition zone as the proximity of the aerofoil in the wall-normal direction is varied.

Original languageEnglish
Article number11
Number of pages13
JournalExperiments in Fluids
Issue number1
Early online date3 Dec 2019
Publication statusPublished - Jan 2020
Externally publishedYes

Cite this