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Computations of drop collision and coalescenceComputations of drops collision and coalescence are presented. The computations are made possible by a recently developed finite difference/front tracking technique that allows direct solutions of the Navier-Stokes equations for a multi-fluid system with complex, unsteady internal boundaries. This method has been used to examine the boundaries between the various collision modes for drops of equal size and two examples, one of a 'reflective' collision and another of a 'grazing' collision is shown. From drops of unequal size, coalescence can result in considerable mixing between the fluid from the small and the large drop. This problem is discussed and one example showed. In many cases it is necessary to account also for heat transfer along with the fluid mechanics. We show two preliminary results where we are using extensions of the method to simulate such a problem. One example shows pattern formation among many drops moving due to thermal migration, the other shows unstable evolution of a solidification front.
Document ID
19950008128
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tryggvason, Gretar
(Michigan Univ. Ann Arbor, MI, United States)
Juric, Damir
(Michigan Univ. Ann Arbor, MI, United States)
Nobari, Mohammed H. R.
(Michigan Univ. Ann Arbor, MI, United States)
Nas, Selman
(Michigan Univ. Ann Arbor, MI, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1994
Publication Information
Publication: NASA. Lewis Research Center, Second Microgravity Fluid Physics Conference
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
95N14542
Funding Number(s)
CONTRACT_GRANT: NAG3-1317
CONTRACT_GRANT: NGT-51070
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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