Academics Research Our Dept Resources Academics Undergraduate Programs Graduate Programs Course Descriptions Mission and Objectives Research Department Faculty & Staff Graduate Students Open Faculty Positions News & Announcements Events Resources Webmail Career Services Engineering Student Services Intranet Home > Our Department > All Events > Droplet Shedding and Impingement Resistance: Surface Texture Design and Applications    Droplet Shedding and Impingement Resistance: Surface Texture Design and Applications   By Dr. Tao Deng GE Global Research Center Niskayuna, NY   Thu, Sep 10, 2009 2:30 PM   Location: Lopata Hall Room 101   Abstract:   In this seminar I will discuss our effort at GE Global Research Center in both fundamental study and applications of water interactive surfaces. Many industrial applications, such as inject printing, spray coating, power plant cooling towers, and steam turbines, involve interaction between water and solid surfaces. This presentation will discuss the design and experimental study of the textured surfaces that are developed for those applications. The study investigated the interaction of both static water droplets and moving water droplets at different velocities with such surfaces as a function of surface texture. For the static water droplets, the optimum shedding happened at the intermediate energy state, whose internal Laplace pressure was insufficient to overcome the energy barrier required to wet the surface homogeneously.  In the case of impinging water droplets, the water-air interface experiences different wetting pressure during the impact. The underline substrate, however, provides an anti-wetting pressure to resist the wetting of such droplets. Depending on the magnitude of the anti-wetting pressure, these droplets experience three wetting states after the impingement: total wetting state, partial wetting state, and total bouncing state, which provides the best impingement resistance to the impacting droplets. The fundamental understanding from above experiments provides the base for specific designs in different applications, such as moisture control in steam turbines and ice reduction in aircraft engines.       Mechanical, Aerospace & Structural Engineering, Washington University in St. Louis One Brookings Drive, Box 1185, St. Louis, Missouri 63130 Office Location: 305 Jolley Hall, Phone: (314) 935-6047, Fax: (314) 935-4014   Home |  Academics | Research | Department | Resources © 2009 | Did you find it?