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In dropwise condensation the condensate liquid collects in the form of countless droplets of varying diameters on the condensing surface, instead of forming a continuous film, and does not wet the solid cooling surface. The droplets develop at points of surface imperfections, called nucleation sites, and grow in size as more vapour condenses on its exposed surface. When the size of droplets is large there comes a time the droplet breakaway from the surface and knock off other droplets and carries it downstream. The moving droplet devours the droplets of smaller size. Dropwise condensation is one of the most effective mechanism of heat transfer and extremely large heat transfer coefficients can be achieved with this mechanism. In dropwise condensation, there is no liquid film to resist heat transfer, and as a result heat transfer coefficients can be achieved more than 10 times larger than those associated with film condensation, although 3-5 times is more common. Heat transfer coefficients are large so designers can achieve a specified heat transfer rate with a smaller surface area and thus a smaller and less expensive condenser.
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Pamela Marie Norris is an American mechanical engineer and materials scientist known for her research on aerogels, and heat transfer on scales ranging from the nanoscale to macroscopic objects such as jet blast deflectors. She is Frederick Tracy Morse Professor Emeritus at the University of Virginia, vice provost for research at George Washington University, and editor-in-chief of the journal Nanoscale and Microscale Thermophysical Engineering.
Yıldız Bayazıtoğlu is a Turkish-American mechanical engineer known for her research on heat transfer on scales ranging from the fuel tanks of the Space Shuttle to nanotechnology. She has also performed research on containerless processing, fuel cells and solar cells, molecular dynamics, microchannels, and targeted temperature management in medical treatment. She is Harry S. Cameron Chair in Mechanical Engineering and professor of materials science and nanoengineering at Rice University.
Leslie M. Phinney is an American thermal engineer and an expert on microscale heat transfer, particularly involving thin films, surfaces, and boundaries between different materials. She is a researcher at Sandia National Laboratories.
References
- ↑ Birth year from VIAF authority control record, retrieved 2023-07-03
- 1 2 "The classes: '79", Brown Alumni Monthly, vol. 82, no. 4, pp. 47–48, December 1981 – January 1982
- 1 2 "People", Modeling of Complex Thermal Systems Laboratory, UCLA Samueli School of Engineering, retrieved 2023-07-03
- ↑ "Celebrating Adrienne Lavine's Five Years of Stellar Service as Associate Vice Provost", Staff Highlights, UCLA Center for the Advancement of Teaching, retrieved 2023-07-03
- ↑ Recipients of the CIRP F. W. Taylor Medal award, International Academy for Production Engineering, retrieved 2023-07-03
- ↑ All fellows (PDF), American Society of Mechanical Engineers, 2022, retrieved 2023-07-03
- ↑ "Class of 1979", Brown Alumni Magazine, April 2023
