Modifications to the k-kL-ω transition model based on Pohlhausen and Falkner-Skan profiles

Fürst, Jiri and Islam, Mazharul and Príhoda, Jaromír and Wood, David H. (2015) Modifications to the k-kL-ω transition model based on Pohlhausen and Falkner-Skan profiles. In: North American Wind Energy Academy (NAWEA) 2015 Symposium, 9th-11th June 2015, Virginia, USA.

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Abstract

We will present novel modifications of the three-equation k-kL-u: eddy viscosity model proposed by Walters and Cokljat [1] for the adverse pressure gradient flows that occur on wind turbine blades and airfoils. The original model was based on the k-u: framework with an additional transport equation for laminar kinetic energy which allows the prediction of natural or bypass laminar-turbulent transitions. The model uses only local information and is, therefore, easily implemented in modern CFD codes including Fluent and OpenFOAM. The original model shows very good agreement with experimental data for zero pressure gradient flows (see e.g. [1]) but it delays the transition for adverse pressure gradient flows at low free-stream turbulence levels [2]. Both stability analysis and experiments show that the pressure gradient has a big influence on transition [3]

Item Type:	Conference or Workshop Item (Slide Presentation)
Additional Information:	7416/56604
Uncontrolled Keywords:	k-kL-ω transition model, Pohlhausen and Falkner-Skan profiles
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Dr. Mazharul Islam
Date Deposited:	21 Apr 2017 11:42
Last Modified:	25 Apr 2017 10:30
URI:	http://irep.iium.edu.my/id/eprint/56604

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