Inclusion of crossflow effects in wa-γ transition model

Hakop J. Nagapetyan, Ramesh K. Agarwal

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A local correlation-based one-equation intermittency model was recently added to the one-equation Wray-Agarwal (WA) turbulence model to create a two-equation WA-γ transition model for computing transitional flows. This model covers several types of transitions except for crossflow-induced transition, which can be a dominant mode of transition in flows involving three-dimensional geometries. In this paper, the helicity approach is adapted to the WA-γ transition model to account for the crossflow effects without compromising the simplicity of the intermittency equation γ. The model is calibrated by computing the transitional flow past a prolate spheroid for which experimental measurements are available. The modified WA-γ-Crossflow model demonstrates that it can predict the crossflow induced transition reasonably well without requiring significant additional computational effort.

Original languageEnglish
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
DOIs
StatePublished - 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: Jan 7 2019Jan 11 2019

Publication series

NameAIAA Scitech 2019 Forum

Conference

ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego
Period01/7/1901/11/19

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