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Tea Seminar

Energy Stable Boundary Conditions for the Nonlinear Incompressible Navier-Stokes Equations

Event Type: 
Tea Seminar
Date and Time: 
Friday, September 1, 2017 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Jan Nordström
Abstract: 

We derive boundary conditions for the nonlinear incompressible Navier-Stokes equations following the general recipie given in [1]. We present two formulations stemming from different techniques to diagonalize the boundary terms. Both formulations lead to an energy estimate.

Smoothed Profile Method for Modeling Particulate Flows

Event Type: 
Tea Seminar
Date and Time: 
Friday, August 25, 2017 - 4:30pm
Location: 
CTR Conference Room 103
Speaker(s): 
Fazlolah Mohaghegh (Ehsan)
Abstract: 

This study shows recent developments in the Smoothed Profile Method (SPM) as a diffuse-interface approach. SPM is well suited towards simulating the dynamics of dense particulate flows at the meso-scale, i.e. when particles are resolved.

Model-based and data-based flow analysis using optimization

Event Type: 
Tea Seminar
Date and Time: 
Friday, August 18, 2017 - 4:15pm
Location: 
Yang & Yamazaki Environment & Energy Building (Y2E2), Room 111, 473 Via Ortega (Science and Engineering Quad, near the corner of Via Ortega and Panama Street)
Speaker(s): 
Professor Peter Schmid
Abstract: 
In recent years, PDE-constrained optimization has become an effective and efficient tool in the analysis of complex fluid systems.

A multifractal formulation of the momentum cascade in wall-bounded turbulence

Event Type: 
Tea Seminar
Date and Time: 
Friday, August 4, 2017 - 4:15pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Xiang I. A. Yang
Abstract: 

The cascading process of turbulent kinetic energy from large-scale fluid motions to small-scale and lesser-scale fluid motions in isotropic turbulence may be modeled as a hierarchical random multiplicative process according to the multifractal formalism.

Characterization of buoyancy-driven turbulent flows over inclines 

Event Type: 
Tea Seminar
Date and Time: 
Friday, July 21, 2017 - 4:15pm
Location: 
CTR Conference Room 103
Speaker(s): 
Dr. Marco Giometto, Postdoctoral Fellow, Center for Turbulence Research, Stanford University
Abstract: 

Buoyancy driven turbulent flows over inclines will be considered within the conceptual framework of the Prandtl slope-flow model. Such flows are ubiquitous in engineering and the environment, but despite decades of active research, they remain a poorly understood problem.

Observation of laminar to turbulent transition in an already turbulent flow

Event Type: 
Tea Seminar
Date and Time: 
Friday, July 7, 2017 - 4:15pm
Location: 
CTR Conference Room 103
Speaker(s): 
Professor Shuisheng He, Department of Mechanical Engineering, University of Sheffield, United Kingdom
Abstract: 

Professor He will present a new perspective of transient turbulent flow and show that in such flows, turbulence does not progressively evolve from one state to another. Instead, the flow is characterised by the development of a laminar boundary layer followed by transition to turbulence.

Clustering of Inertial Aerosols in Homogeneously Sheared Gas

Event Type: 
Tea Seminar
Date and Time: 
Friday, June 9, 2017 - 4:15pm
Location: 
CTR Conference Room 103
Speaker(s): 
Mohamed Houssem Kasbaoui, PhD Candidate, Aerospace Engineering, Sibley School of Mechanical and Aerospace Engineering, Cornell University
Abstract: 

Particle-laden flows of sedimenting small heavy solid particles or droplets in a carrier gas have strong inter-phase coupling even at low volume fractions. The slip velocity between phases leads to sustained clustering that strongly modulates the overall flow.

Direct numerical simulation of droplet-laden isotropic turbulence

Event Type: 
Tea Seminar
Date and Time: 
Friday, June 2, 2017 - 4:15pm
Location: 
CTR Conference Room 103
Speaker(s): 
Michael S. Dodd, Department of Aeronautics and Astronautics, University of Washington
Abstract: 

Understanding how droplets and turbulence interact is important in numerous applications ranging from rain formation to oil spills to spray combustion, yet most of our knowledge of two-phase turbulence is limited to solid particles.

Simulating solids like fluids: A fully Eulerian approach to fluid-structure interaction

Event Type: 
Tea Seminar
Date and Time: 
Friday, May 26, 2017 - 4:15pm
Location: 
CTR Conference Room 103
Speaker(s): 
Professor Kenneth M. Kamrin, Department of Mechanical Engineering, Massachusetts Institute of Technology
Abstract: 

Fluids and solids tend to be addressed using distinct computational approaches.  Solid deformation is most commonly simulated with Lagrangian finite-element methods, whereas fluid flow is amenable to Eulerian-frame approaches such as finite difference and finite volume methods.  Problems that mix

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