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CFD modelling of drop formation in a liquid-liquid system

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Author

  • Anna Timgren
  • Gun Trägårdh
  • Christian Trägårdh

Editor

  • Martin Sommerfeld

Summary, in English

The formation of an oil drop from a single capillary in a continuous phase flowing perpendicular to the capillary opening has been studied numerically. The shear stress at the interface of the forming drop, the angular velocity inside the drop and the pressure field around the drop have been determined in a cross section of the drop formation area. The results show a maximum pressure in the continuous phase near the stagnation point and a maximum shear stress in both phases nearer the top of the forming drop. The lowest pressures were found behind the top of the drop, where the surrounding flow starts to separate from the interface of the drop. The shear stress outside the drop causes a drag which, together with the drag originated from the pressure field around the drop, promotes drop detachment.

Department/s

  • Department of Food Technology, Engineering and Nutrition

Publishing year

2007

Language

English

Pages

1-8

Publication/Series

6th International Conference on Multiphase Flow

Document type

Conference paper

Topic

  • Food Engineering

Keywords

  • VOF
  • Interfacial shear
  • Emulsification

Conference name

6th International Conference on Multiphase Flow, 2007

Conference date

2007-07-08 - 2007-07-13

Conference place

Leipzig, Germany

Status

Published

ISBN/ISSN/Other

  • ISBN: 978-3-86010-913-7