Assessment of Higher-order RANS Closures in a Decelerated Planar Wall-bounded Turbulent Flow | Zendy

Elbert Jeyapaul | Zendy; Gary N. Coleman | Zendy; Christopher L. Rumsey | Zendy

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Assessment of Higher-order RANS Closures in a Decelerated Planar Wall-bounded Turbulent Flow

Author(s) -

Elbert Jeyapaul,

Gary N. Coleman,

Christopher L. Rumsey

Publication year - 2014

Publication title -

46th aiaa fluid dynamics conference

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.2014-2088

Subject(s) - reynolds averaged navier–stokes equations , turbulence , planar , pressure gradient , mechanics , flow (mathematics) , open channel flow , dissipation , closure (psychology) , moment (physics) , a priori and a posteriori , bounded function , computer science , statistical physics , physics , mathematics , classical mechanics , mathematical analysis , thermodynamics , computer graphics (images) , economics , philosophy , epistemology , market economy

A reference DNS database is presented, which includes third- and fourth-order moment budgets for unstrained and strained planar channel flow. Existing RANS closure models for third- and fourth-order terms are surveyed, and new model ideas are introduced. The various models are then compared with the DNS data term by term using a priori testing of the higher-order budgets of turbulence transport, velocity-pressure-gradient, and dissipation for both the unstrained and strained databases. Generally, the models for the velocity-pressure-gradient terms are most in need of improvement.

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