TY - GEN
T1 - Inclusion of crossflow effects in wa-γ transition model
AU - Nagapetyan, Hakop J.
AU - Agarwal, Ramesh K.
N1 - Publisher Copyright:
� 2019 by German Aerospace Center (DLR). Published by the American Institute of Aeronautics and Astronautics, Inc.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85083941813&partnerID=8YFLogxK
U2 - 10.2514/6.2019-2322
DO - 10.2514/6.2019-2322
M3 - Conference contribution
AN - SCOPUS:85083941813
SN - 9781624105784
T3 - AIAA Scitech 2019 Forum
BT - AIAA Scitech 2019 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2019
Y2 - 7 January 2019 through 11 January 2019
ER -