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Tea Seminar

Interaction between the atmospheric boundary layer and wind turbines

Event Type: 
Tea Seminar
Date and Time: 
Friday, November 6, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Mahdi Abkar, CTR Postdoctoral Fellow
Abstract: 

Wind turbines extract kinetic energy from the ambient flow in the turbulent atmospheric boundary layer (ABL). A profound understanding of the mutual interactions between ABL and wind turbines will indeed shed light on the path to the optimized wind farms.

Lagrangian subgrid modelling for the relative separation of tracers in turbulence

Event Type: 
Tea Seminar
Date and Time: 
Friday, October 2, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Federico Toschi, Team Leader PIV, German Aerospace Center
Abstract: 

Turbulence has an important influence on the transport of small particulate matter like dust in the atmosphere, fuel droplets in combustion chambers and small biological organisms in marine environments.

Shake-­The-­Box: A 4D-­PTV method for turbulence characterization at high particle densities

Event Type: 
Tea Seminar
Date and Time: 
Friday, September 18, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Andreas Schröder, Team Leader PIV, German Aerospace Center
Abstract: 

In order to increase the prediction capabilities of advanced numerical methods for turbulent (wall bounded) flows at relatively high Reynolds numbers, accurate experimental validation data-­sets including the full Reynolds stress tensor at high spatial resolution are urgently required.

Turbulent Flow over Bluff Bodies: From Sub-Critical to Super-Critical Flow Regimes

Event Type: 
Tea Seminar
Date and Time: 
Friday, September 11, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Oriol Lehmkuhl, Professor, Technical University of Catalonia, Spain
Abstract: 

This seminar will focus on the numerical simulation of the turbulent flow past bluff bodies which is of importance due to its presence in many engineering applications (flows past an airplane, submarine, automobile, in turbomachines, etc.).

The outer zone of turbulent boundary layers

Event Type: 
Tea Seminar
Date and Time: 
Monday, August 17, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Prof. Javier Jimenez, Professor of Fluid Mechanics, School of Aeronautics, Universidad Politecnica de Madrid, Spain
Abstract: 

Using data from new simulations of the turbulent boundary layer, we describe several features of the outer zone of wall-­bounded flow at relatively high Reynolds numbers (Reth=6600).

Modeling The Pressure Strain Correlation Under Uncertainties

Event Type: 
Tea Seminar
Date and Time: 
Friday, August 7, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Aashwin Mishra, Dept. of Aerospace Engineering, Texas A&M University
Abstract: 

The cardinal issues forestalling a better understanding of the turbulence phenomenon are the nonlinearity of the inertial cascade physics and the non-local nature of the action of pressure.

Numerical Modeling Of Separated Flows At Moderate Reynolds Numbers Appropriate For Turbine Blades And Unmanned Aero Vehicles

Event Type: 
Tea Seminar
Date and Time: 
Friday, July 31, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Giacomo Castiglioni, Aerospace Engineering, University of Southern California
Abstract: 

Flows over airfoils and blades in rotating machinery, for unmanned and micro-aerial vehicles, wind turbines, and propellers consist of a laminar boundary layer near the leading edge that is often followed by a laminar separation bubble and transition to turbulence further downstream.

Numerical study of ignition and light-around process in aeronautical gas turbines.

Event Type: 
Tea Seminar
Date and Time: 
Friday, July 24, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Lucas Esclapez, CTR Postdoctoral Fellow
Abstract: 

For safety reasons, in-flight relight of the engine must be guaranteed over a wide range of operating conditions but the increasing stringency of pollutant emission constraints requires the development of new aero-engine combustor whose design might be detrimental to the ignition capability.

DNS AND LES OF STABILIZATION AND INSTABILITIES IN ROCKET ENGINES

Event Type: 
Tea Seminar
Date and Time: 
Friday, July 10, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Thierry Poinsot, Research Director, CNRS, Toulouse and Head of CFD group CERFACS
Abstract: 

Liquid fuel rocket engines using H2/O2 combustion are again a major research theme in Europe especially for the future Ariane 6 rocket. This talk will present recent progress in two critical mechanisms controlling combustion in cryogenic H2/O2 rocket engines.

Phase-­field modeling of multiphase flows using the lattice Boltzmann method with adaptive mesh refinement

Event Type: 
Tea Seminar
Date and Time: 
Friday, June 5, 2015 - 4:00pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Abbas Fakhari, CTR Postdoctoral Fellowship Candidate, Mechanical Engineering, City College of New York
Abstract: 

Numerical modeling of multiphase flows at high Reynolds numbers is a challenging task. Traditional methods based on sharp-­interface models might encounter numerical difficulty in handling rapid topological changes such as breakup and coalescence.

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