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Surface settling in partially filled containers upon step reduction in gravityA large literature exists concerning the equilibrium configurations of free liquid/gas surfaces in reduced gravity environments. Such conditions generally yield surfaces of constant curvature meeting the container wall at a particular (contact) angle. The time required to reach and stabilize about this configuration is less studied for the case of sudden changes in gravity level, e.g. from normal- to low-gravity, as can occur in many drop tower experiments. The particular interest here was to determine the total reorientation time for such surfaces in cylinders (mainly), as a function primarily of contact angle and kinematic viscosity, in order to aid in the development of drop tower experiment design. A large parametric range of tests were performed and, based on an accompanying scale analysis, the complete data set was correlated. The results of other investigations are included for comparison.
Document ID
19910005243
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Weislogel, Marl M. (NASA Lewis Research Center Cleveland, OH, United States)
Ross, Howard D. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1990
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
E-4998
NASA-TM-103641
NAS 1.15:103641
Accession Number
91N14556
Funding Number(s)
PROJECT: RTOP 674-24-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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