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Microgravity two-phase fluid flow pattern modelingWhen gas and liquid mixtures flow in a pipe, the distribution of the two phases may take many forms. A flow pattern, or flow regime, is the characteristic spatial distribution of the phases of flow in a pipe. Because heat transfer and pressure drop are dependent on the characteristic distribution of phases, it is necessary to describe flow patterns in an appropriate manner so that a hydrodynamic or heat transfer theory applicable to that can be chosen. A theoretical two phase flow regime transition map under a microgravity environment was developed on physical concepts. These transitions use four basic flow patterns: dispersed flow, slug flow, stratified flow, and annular flow. The forces considered are body force, surface tension force, inertial force, friction, and the force from eddy turbulent fluctuation. Three dimensionless parameters were developed. Because these transition boundaries were developed based on physical concepts, they should be applicable to flow regimes occurring in various design conditions. Because the flow pattern data from KC-135 experiments are insufficient to verify these theoretical transition lines completely, an adiabatic experiment for flow regime analysis is recommended.
Document ID
19880015083
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lee, Doojeong
(Texas A&M Univ. College Station, TX, United States)
Best, Frederick R.
(Texas A&M Univ. College Station, TX, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Publication Information
Publication: New Mexico Univ., Transactions of the Fifth Symposium on Space Nuclear Power Systems
Subject Category
Materials Processing
Accession Number
88N24467
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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