For more information about this meeting, contact Andrew Belmonte, Hope Shaffer, Tim Reluga.
| Title: | Moving Contact Lines: from Giant Slip on Textured Substrates to Water Striders |
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| Seminar: | The Pritchard Lab Seminar |
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| Speaker: | James J. Feng, Dept of Mathematics, University of British Columbia - Canada |
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| Abstract: |
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| A three-phase contact line forms when a gas-liquid interface intersects a solid substrate, and a moving contact line presents a well-known singularity that cannot be computed using the conventional Navier-Stokes formalism. I will discuss the use of a diffuse-interface model for computing moving contact lines. The Cahn-Hilliard diffusion is known to regularize the singularity and makes possible a continuum-level computation. But relating the results to physical reality is subtle. I will show numerical results that suggest a well-defined sharp-interface limit, with a finite contact line speed that can be related to measurements. Then I will discuss two applications: enhanced slip on textured substrates and propulsion of water striders on an air-water interface. |
Room Reservation Information
| Room Number: | MB315 |
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| Date: | 11 / 15 / 2010 |
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| Time: | 02:30pm - 03:30pm |
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