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Thermocapillarity and Thermoviscosity Effects on the Spin Coating of Wetting Liquids Above an Axisymmetrically Heated Disk

[+] Author Affiliations
Lin Wu

University of Nebraska at Lincoln

Paper No. IMECE2005-82162, pp. 345-348; 4 pages
doi:10.1115/IMECE2005-82162
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Fluids Engineering
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-4219-3 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

The spin coating of wetting liquid on an axisymmetrically and radially heated disk is studied numerically under lubrication and zero Biot number assumptions. Our results show that both thermocapillarity (temperature dependent surface tension) and thermoviscosity (temperature dependent viscosity) effects can be harnessed to enhance the depletion rate of the spin coated liquid film if the disk center is hot. When the applied radial temperature profile has a steep change, an anchored shock wave is generated with a strength determined by the temperature induced viscosity change.

Copyright © 2005 by ASME
Topics: Wetting , Disks , Spin coating

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