Colloquia & Seminars
The Inaugural Stephen H. Davis Symposium

Tuesday, October 15, 10 a.m. – 5 p.m.

Lunch and reception included
Ford Motor Company Engineering Design Center 
Hive Classroom (Ford 2-350)

The inaugural Stephen H. Davis Symposium will honor the retirement of Stephen Davis, Walter P. Murphy Professor of Applied Mathematics and McCormick Institute Professor. Professor Davis’s contributions to fluid mechanics and materials science are well known, and the symposium will celebrate his many fundamental and impactful contributions to the field.

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Symposium Speakers

John HinchJohn Hinch
Professor, Fluid Dynamics, University of Cambridge

Levitation and Locomotion on an Air-table of Plates with Herringbone Grooves

Experiments in ESPCI in Paris and numerical simulations in Darmstadt have shown that plates with herringbone grooves in their base are accelerated on a smooth air-table in the direction that the chevron grooves point, while smooth plates on an air-table with herringbone grooves are accelerated in the opposite direction. Newton's third law? Not quite. Hinch will discuss a simple two-dimensional model that is constructed of the air flow down a long channel with pressure-controlled influx across the lower boundary: lubrication theory with inertia or boundary layers without an outer flow. Limiting cases are considered of low and high Reynolds numbers, and of small and large pressure drop down the channel compared with the pressure drop across the porous plate; all tested against numerical solutions. The levitation and locomotion forces are calculated, with a relatively simple prediction for the locomotive acceleration; which fits the experimental data with plausible excuses. 

Hinch received his education at Cambridge University, graduating with a BA in mathematics in 1968 and a PhD in 1972 on the "Mechanics of suspensions of particles in fluids, with an additional section on the convection due to a moving heat source." After a half-year postdoc at Caltech, he returned to a faculty position at Cambridge University, and since 1998 has served as a professor of fluid mechanics. He is a fellow of the American Physical Society, the Royal Society of London, and a foreign member of the National Academy of Engineering. 

Bud HomsyG.M. "Bud" Homsy
Affiliate Professor, Mechanical Engineering, University of Washington

Some Interfacial Flow Problems

Homsy will discuss his work on interfacial flows that was inspired by and influenced by Stephen H. Davis, including interfacial instabilities in the presence of chemical reactions (reactive viscous fingering); flows driven by interfacial electrical stresses (electrospraying, chaotic advection); and problems involving contact line dynamics (evaporation over rough surfaces and coating over topography). 

Homsy received his BS at the University of California, Berkeley, his MS and PhD at the University of Illinois, and completed a NATO postdoctoral fellowship at Imperial College, London. He has had faculty appointments at Stanford University, UC Santa Barbara, University of British Columbia - Vancouver, and University of Washington. Homsy has made contributions in the areas of hydrodynamic stability, flow through porous media, thermal convection, fluid-particle systems, interfacial flows, and non-Newtonian flows. His honors include election to the US National Academy of Engineering in 2006 and to the Washington State Academy of Sciences in 2015. 

Detlef LohseDetlef Lohse
Professor, Physics of Fluids, University of Twente

Segregation in Multicomponent Droplet Evaporation

While the evaporation of a single component droplet is well understood, the richness of phenomena in multicomponent droplet evaporation keeps surprising. Lohse's talk will show and explain several such phenomena, namely evaporation-triggered segregation, due to either weak solutal Marangoni flow or gravitational effects, and the evaporation of ternary liquid droplet, which can lead to spontaneous nucleation of droplets consisting of a new phase. He will also show how this new phase can be utilized to self-lubricate the droplet in order to suppress the coffee stain effects. The research shown in this talk combines experiments, numerical simulations, and theory. 

Detlef Lohse studied physics at the Universities of Kiel & Bonn (Germany) and earned his PhD at the University of Marburg. He then joined the University of Chicago as a postdoc. After his habilitation (Marburg, 1997), he became chair at University of Twente in the Netherlands and built up the Physics of Fluids group. His present research interests include turbulence and multiphase flow, micro- and nanofluidics (bubbles, drops, inkjet printing, wetting), and granular and biomedical flow. He does both fundamental and applied science and combines experimental, theoretical, and numerical methods. 

Parviz MoinParviz Moin
Founding Director of the Center for Turbulence Research and the Institute for Computational and Mathematical Engineering, Stanford University

Probing Turbulence Physics Using Numerical Simulation Databases - A Case Study in Predictive Science

With the exponential growth in computer power, high fidelity numerical simulations have provided unprecedented comprehensive datasets for the study of the mechanics of turbulent flows. Moin will share a brief review of fundamental research on the structure of wall-bounded turbulent flows with particular emphasis on the role played by large scale numerical simulations in conducting controlled experiments of discovery and the insights gained as a result. On the other hand, the early promise of direct numerical simulations to provide data to improve engineering models has not been fulfilled. He will expand on this in the context of lessons learned of the limitations of data science in the development of physical models.

Moin is the Franklin P. and Caroline M. Johnson Professor of Mechanical Engineering and the Founding Director of the Center for Turbulence Research and the Institute for Computational and Mathematical Engineering at Stanford University. He has pioneered the use of direct numerical simulation for the study of turbulence physics and has written widely on the structure of turbulent shear flows. He is a fellow of the American Physical Society and the American Academy of Arts and Sciences, as well as a member of the US National Academy of Engineering and the National Academy of Sciences.