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Investigations on single-phase natural circulation loop dynamics. Part 2: Role of wall constitutive laws

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Title Investigations on single-phase natural circulation loop dynamics. Part 2: Role of wall constitutive laws
 
Creator NAVEEN, K
IYER, KN
DOSHI, JB
VIJAYAN, PK
 
Subject Natural circulation
Single-phase
Wall constitutive laws
Friction factor
CONVECTION HEAT-TRANSFER
STABILITY CHARACTERISTICS
MIXED CONVECTION
RECTANGULAR LOOP
FRICTION-FACTOR
VERTICAL TUBES
STEADY-STATE
FLUID-FLOW
BEHAVIOR
LAMINAR
 
Description Unlike forced circulation systems, natural circulation systems need to be started from the state of zero flow. Literature study shows that under low flow conditions, the velocity field near the wall is significantly modified by secondary convection currents particularly during diabatic conditions. In view of this, the applicability of conventional forced convection wall constitutive laws to these systems has been investigated both theoretically and experimentally. First the applicability of conventional wall constitutive laws derived from steady state forced convection experiments is examined. Next, the results of experimental investigations carried out in a rectangular natural circulation loop are presented. Finally, a new correlation for wall friction factor is proposed for flow in horizontal pipes under diabatic conditions. (C) 2014 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-12-29T05:12:04Z
2014-12-29T05:12:04Z
2014
 
Type Article
 
Identifier PROGRESS IN NUCLEAR ENERGY, 75105-116
0149-1970
http://dx.doi.org/10.1016/j.pnucene.2014.04.011
http://dspace.library.iitb.ac.in/jspui/handle/100/17162
 
Language English