화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.18, No.2, 41-49, June, 2006
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Simulations of pendant drop formation of a viscoelastic liquid
Malcolm R. Davidson†, Dalton J.E. Harvie, and Justin J. Cooper-White1
  • Department of Chemical and Biomolecular Engineering, The University of Melbourne, Victoria 3010, Australia
  • 1Department of Chemical Engineering, The University of Queensland, St. Lucia, Qld. 4067, Australia
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A modified Volume-of-Fluid (VOF) numerical method is used to predict the dynamics of a liquid drop of a low viscosity dilute polymer solution, forming in air from a circular nozzle. Viscoelastic effects are represented using an Oldroyd-B model. Predicted drop shapes are compared with experimental observations. The main features, including the timing of the shape evolution and the “bead-on-a-string” effect, are well reproduced by the simulations. The results confirm published conclusions of the third author, that the deformation is effectively Newtonian until near the time of Newtonian pinch-off and that the elastic stress becomes large in the pinch region due to the higher extensional flow there.
Keywords:pendant drop;viscoelastic;volume of fluid method;interface
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