Skip to content Skip to navigation

Tea Seminar

Wall-less wall-bounded turbulence

Event Type: 
Tea Seminar
Date and Time: 
Friday, April 27, 2018 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Adrian Lozano-Duran
Abstract: 

At first sight, walls appear as the most relevant ingredient in turbulence confined or limited by solid surfaces, and it seems plausible to assume that they should be the origin and organizing agent of wall-bounded turbulence.  Consequently, many efforts have been devoted to understand the struct

On fractional derivative closures for turbulence: a critical evaluation

Event Type: 
Tea Seminar
Date and Time: 
Friday, April 6, 2018 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Perry Johnson
Abstract: 

Turbulence modeling has traditionally relied heavily on the eddy viscosity concept relating turbulent fluxes to local gradients. Important deficiencies of the eddy viscosity concept include its inability to capture non-local and memory effects of turbulence.

Nonlinear stability analysis of plane shear flows and related flow control

Event Type: 
Tea Seminar
Date and Time: 
Friday, March 16, 2018 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Zhu Huang
Abstract: 

The minimal seeds (the disturbance with the lowest energy which triggers turbulence) for plane shear flows have been captured by the variational method dealing with the nonlinear Navier-Stokes equations.

Turbulence in a microchannel

Event Type: 
Tea Seminar
Date and Time: 
Friday, March 2, 2018 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Professor V. Kumaran
Abstract: 

It is well known that the transition from a laminar to a turbulent flow takes place in a rigid tube takes place at a Reynolds number of about 2100, and in a rigid channel at a Reynolds number of about 1200.

Eigenspace-based characterization of structural uncertainty in large-eddy simulation closure models

Event Type: 
Tea Seminar
Date and Time: 
Friday, February 23, 2018 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Lluis Jofre-Cruanyes
Abstract: 

Large-eddy simulation (LES) has gained significant importance as a high-fidelity technique for the numerical resolution of complex turbulent flow.

A combined volume-of-fluid method and low-Mach-number approach for DNS of evaporating droplets in turbulence

Event Type: 
Tea Seminar
Date and Time: 
Friday, February 9, 2018 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Michael S. Dodd
Abstract: 

A set of governing equations to describe gas-liquid flows with phase change in the low Mach number limit will be presented.

Direct numerical simulation of a turbulent boundary layer with separation and reattachment over a wide range of Reynolds numbers

Event Type: 
Tea Seminar
Date and Time: 
Friday, November 10, 2017 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Hiroyuki Abe
Abstract: 

Separation and reattachment of a turbulent boundary layer are crucial issues in aeronautical and engineering applications since they are associated with upper bound of efficiency for the devices.

Optimal Spectral Approximation Methods for Parameterized PDEs with Application to Flow Problems

Event Type: 
Tea Seminar
Date and Time: 
Friday, November 3, 2017 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Kookjin Lee
Abstract: 

We consider the numerical solution of parameterized linear systems where the system matrix, the solution, and the right-hand side are parameterized by a set of uncertain input parameters. We explore spectral methods in which the solutions are approximated in a chosen finite-dimensional subspace.

Pages

Subscribe to Tea Seminar