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Title: Study of void fraction and mixing of immiscible liquids in a pool configuration by an upward gas flow

Abstract

In this paper, investigations are performed to study the mixing between immiscible liquids in a pool configuration due to an upward gas flow. A water-R113 system is sued in the bubbly/churn-turbulent regimes to determine the effects of the unagitated pool depth on layer mixing. The superficial gas velocity at which full mixing is attained is observed to increase with the pool depth, although it is concluded that this is a weak dependency. Mixing in the churn-turbulent regime is studied with Wood's metal-water and Wood's metal-silicone fluid (100 cS) as pairs of fluids. Additional past mixing data from six other fluids are also included in the data base. A criterion is proposed to determine if two liquids will entrain in bubbly or churn-turbulent flow. Correlations are derived that, for a set of given conditions, allow prediction of the mixing state (mixed or segregated) of a system. Because of the indirect method of measuring the mixed layer thickness, pool void fraction experiments are also performed. For the case of water and R113, the effect of unagitated pool depth on the void fraction is studied.

Authors:
;  [1]
  1. Univ. of Wisconsin-Madison, Nuclear Engineering and Engineering Physics Dept., Madison, WI (US)
Publication Date:
OSTI Identifier:
7232856
Resource Type:
Journal Article
Journal Name:
Nuclear Technology; (United States)
Additional Journal Information:
Journal Volume: 99:1; Journal ID: ISSN 0029-5450
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 42 ENGINEERING; REACTOR COMPONENTS; HEAT TRANSFER; PERFORMANCE TESTING; REACTOR CORES; MELTING; WORKING FLUIDS; TURBULENT FLOW; BUBBLES; CONCRETES; FUEL-CLADDING INTERACTIONS; GAS FLOW; POOL BOILING; REACTOR ACCIDENTS; REACTOR COOLING SYSTEMS; REACTOR SAFETY; VOID FRACTION; ACCIDENTS; BOILING; BUILDING MATERIALS; COOLING SYSTEMS; ENERGY TRANSFER; FLUID FLOW; FLUIDS; MATERIALS; PHASE TRANSFORMATIONS; SAFETY; TESTING; 220900* - Nuclear Reactor Technology- Reactor Safety; 420400 - Engineering- Heat Transfer & Fluid Flow; 220200 - Nuclear Reactor Technology- Components & Accessories

Citation Formats

Casas, J C, and Corradini, M L. Study of void fraction and mixing of immiscible liquids in a pool configuration by an upward gas flow. United States: N. p., 1992. Web.
Casas, J C, & Corradini, M L. Study of void fraction and mixing of immiscible liquids in a pool configuration by an upward gas flow. United States.
Casas, J C, and Corradini, M L. 1992. "Study of void fraction and mixing of immiscible liquids in a pool configuration by an upward gas flow". United States.
@article{osti_7232856,
title = {Study of void fraction and mixing of immiscible liquids in a pool configuration by an upward gas flow},
author = {Casas, J C and Corradini, M L},
abstractNote = {In this paper, investigations are performed to study the mixing between immiscible liquids in a pool configuration due to an upward gas flow. A water-R113 system is sued in the bubbly/churn-turbulent regimes to determine the effects of the unagitated pool depth on layer mixing. The superficial gas velocity at which full mixing is attained is observed to increase with the pool depth, although it is concluded that this is a weak dependency. Mixing in the churn-turbulent regime is studied with Wood's metal-water and Wood's metal-silicone fluid (100 cS) as pairs of fluids. Additional past mixing data from six other fluids are also included in the data base. A criterion is proposed to determine if two liquids will entrain in bubbly or churn-turbulent flow. Correlations are derived that, for a set of given conditions, allow prediction of the mixing state (mixed or segregated) of a system. Because of the indirect method of measuring the mixed layer thickness, pool void fraction experiments are also performed. For the case of water and R113, the effect of unagitated pool depth on the void fraction is studied.},
doi = {},
url = {https://www.osti.gov/biblio/7232856}, journal = {Nuclear Technology; (United States)},
issn = {0029-5450},
number = ,
volume = 99:1,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 1992},
month = {Wed Jul 01 00:00:00 EDT 1992}
}