A study of the characteristics of oscillatory surface instabilities leading to droplet formation Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/hd76s277w

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  • The characteristics of the free surface in an orifice driven by a periodic forcing function have been studied both theoretically and experimentally. In the theoretical study, two wall boundary condition cases were examined: 1) the radial velocity at the wall of the orifice is zero; and 2) the axial velocity at the wall of the orifice is zero. The result for both boundary conditions is a modal solution where the predicted surface shape as a function of orifice radius and frequency are Bessel functions. The modal frequencies and annular peak locations are also predicted, as a function of orifice radius, for both boundary condition cases. The modal frequencies and annular peak locations differ between the boundary condition cases. The experimental results show: i) the axial velocity boundary condition matches the general behavior of the surface at the wall better than the radial velocity boundary condition case; ii) that the surface shapes generated have the same characteristics as the Bessel function; and iii) near the centerline, the surface shape is well modeled by the Bessel function. The experimental results also show there is a significant shift downward of the observed modal frequencies from the predicted frequencies. A correlation was developed to predict the measured modal frequencies for the axial velocity boundary condition case based on the theoretical predicted frequencies.
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  • description.provenance : Submitted by Kaylee Patterson (kdpscanner@gmail.com) on 2012-08-27T21:31:58Z No. of bitstreams: 1 DanielsBrianJ2001.pdf: 12522661 bytes, checksum: 65e92fd9b0d39d568b72a1f40d7f5403 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-08-27T21:48:53Z (GMT) No. of bitstreams: 1 DanielsBrianJ2001.pdf: 12522661 bytes, checksum: 65e92fd9b0d39d568b72a1f40d7f5403 (MD5)
  • description.provenance : Made available in DSpace on 2012-08-27T21:50:45Z (GMT). No. of bitstreams: 1 DanielsBrianJ2001.pdf: 12522661 bytes, checksum: 65e92fd9b0d39d568b72a1f40d7f5403 (MD5) Previous issue date: 2001-05-01
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-08-27T21:50:45Z (GMT) No. of bitstreams: 1 DanielsBrianJ2001.pdf: 12522661 bytes, checksum: 65e92fd9b0d39d568b72a1f40d7f5403 (MD5)

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