Turbulence closure models for free electroconvection

Testing Turbulence Closure Models against Oceanic Turbulence Measurements

The specific objectives of this project are to obtain a critical evaluation of turbulence closure models that are commonly used in the coastal ocean, and to identify ways to improve these models. Of particular interest are the MY-2.5 model (Mellor and Yamada, 1974, 1982) and the k-e model (e.g., Rodi, 1987), which involve coupled equations describing turbulent kinetic energy and turbulent scale...

Cabot’s Near-wall Function for Turbulence Closure Models

This 24 months research topic was an industrial driven project jointly conducted by RSAF-Defence Science & Technology Agency, NTU and Pratt & Whitney (PWA)United Technology Research Centre. The first phase was held in PWA mainly on field investigation of stall flutter in fan blades through the RSAF’s On-Job-Training Programme. The second phase was held in NTU for code development in simulation ...

Review: Adapting scalar turbulence closure models for rotation and curvature

On Some Electroconvection Models

We consider a model of electroconvection motivated by studies of the motion of a two dimensional annular suspended smectic film under the influence of an electric potential maintained at the boundary by two electrodes. We prove that this electroconvection model has global in time unique smooth solutions. August 6, 2016.

Conceptual dynamical models for turbulence.

Understanding the complexity of anisotropic turbulent processes in engineering and environmental fluid flows is a formidable challenge with practical significance because energy often flows intermittently from the smaller scales to impact the largest scales in these flows. Conceptual dynamical models for anisotropic turbulence are introduced and developed here which, despite their simplicity, c...