The objective of this work is to experimentally study the deformation behavior and breakup process suffered by a droplet submitted to the complex flow developed in a model multitoothed rotor-stator. The studied systems consist of an aqueous solution of polyvinylpyrrolidone in which droplets of diverse silicon oils are dispersed. Experiments are recorded with a digital camera, placed in vertical position, whose images are digitally analyzed. It is found that the drop deformation increases with increasing rotor rotational velocity, showing peaks of deformation corresponding to the proximity of the teeth. Drop breakup is achieved for all studied viscosity ratios. The breakup mechanism depends on the rotor-stator rotational dynamics, with breakup being more effective when the rotor teeth approach the stator teeth.
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November 2006
Technical Papers
Experimental Study of Drop Deformation and Breakup in a Model Multitoothed Rotor-Stator
David Megias-Alguacil,
David Megias-Alguacil
ETH-Zürich,
e-mail: david.megias@ilw.agrl.ethz.ch
Laboratory of Food Process Engineering (LMVT)
, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
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Erich J. Windhab
Erich J. Windhab
ETH-Zürich,
Laboratory of Food Process Engineering (LMVT)
, Schmelzbergstrasse 9, 8092 Zürich, Switzerland
Search for other works by this author on:
David Megias-Alguacil
ETH-Zürich,
Laboratory of Food Process Engineering (LMVT)
, Schmelzbergstrasse 9, 8092 Zürich, Switzerlande-mail: david.megias@ilw.agrl.ethz.ch
Erich J. Windhab
ETH-Zürich,
Laboratory of Food Process Engineering (LMVT)
, Schmelzbergstrasse 9, 8092 Zürich, SwitzerlandJ. Fluids Eng. Nov 2006, 128(6): 1289-1294 (6 pages)
Published Online: May 2, 2006
Article history
Received:
October 20, 2005
Revised:
May 2, 2006
Citation
Megias-Alguacil, D., and Windhab, E. J. (May 2, 2006). "Experimental Study of Drop Deformation and Breakup in a Model Multitoothed Rotor-Stator." ASME. J. Fluids Eng. November 2006; 128(6): 1289–1294. https://doi.org/10.1115/1.2354528
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