威尼斯娱人城官网

    Title： “HEAT TRANSFER ENHANCEMENT BY ACOUSTIC STREAMING”

    Time：2:30 PM, March 4th 

    Place：F307, School of Mechanical Engineering

    Speaker：A.V. Kuznetsov, Dept. of Mechanical & Aerospace Engineering, North Carolina State University

    Abstract：
    A novel concept of microelectronics cooling by acoustic streaming is introduced. The theory of acoustic steaming in a thin gap bounded on one side by a PZT-covered beam is developed. The major fundamental discovery of this project is the existence of a critical gap thickness. When the gap width is smaller than the critical value, for each half standing wavelength distance along the beams two symmetric eddies are observed which occupy almost the whole width of the gap. In this case, the Nusselt number increases with the increase of the channel width. After the critical width, two layers of asymmetric eddies are observed near the oscillating beam and the Nusselt number decreases and approaches unity with further increase of the gap width. The abrupt change of the streaming field and the Nusselt number as the gap width goes through its critical value is due to a bifurcation caused by instability of the vortex structure in the fluid layer.

    Biography: 
    Dr. Kuznetsov joined the Department of Mechanical and Aerospace Engineering at NC State University in 1998 after his postdoctoral appointments at Ruhr-University of Bohum (Germany), Ohio State University. He received PhD in Mechanical Engineering from Russian Academy of Sciences in 1992. Dr. Kuznetsov’s research interests are in general thermofluids area, including transport in porous media, transport in living tissues, bioheat transport, bioconvective sedimentation, Newtonian and non-Newtonian flows, flows in microgravity, and turbulence. His most recent research addresses modeling of electroporation, thermal dose optimization in cancer treatment using hyperthermia, and intracellular transport. He attracted funding from many national and international agencies, including DARPA, NSF, NASA, EPA, NATO, USDA, DTRA, and NTC. He published more than 375 journal papers, 2 books, 10 book chapters, and more than 80 conference papers. He is also an affiliate faculty member of the UNC/NCSU Biomedical Engineering Department, Fellow of American Society of Mechanical Engineering, Associate Editor of the ASME Journal of Heat Transfer and the Journal of Porous Media, and a winner of a prestigious Humboldt Research Award. In 2014, Dr. Kuznetsov was elected as a Member of the Scientific Council of the International Center of Heat and Mass Transfer (ICHMT).