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Experimental investigations on melting of lead in a cuboid with constant heat flux boundary condition using thermal neutron radiography

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Title Experimental investigations on melting of lead in a cuboid with constant heat flux boundary condition using thermal neutron radiography
 
Creator KUMAR, L
MANJUNATH, BS
PATEL, RJ
MARKANDEYA, SG
AGRAWAL, RG
AGRAWAL, A
KASHYAP, Y
SARKAR, PS
SINHA, A
IYER, KN
PRABHU, SV
 
Subject Neutron radiography
Melting
Lead
Constant heat flux
Solid-liquid interface
FLUENT and Stefan number
NATURAL-CONVECTION
SOLID INTERFACE
PURE METAL
LIQUID SUPERHEAT
VERTICAL WALL
PHASE-CHANGE
SOLIDIFICATION
VISUALIZATION
FURNACE
CAVITY
 
Description Knowledge of the melting of lead (shielding material) in enclosures is of great importance in the design of transportation packages. An experimental investigation is carried out to study the melting of lead contained in a stainless steel cuboid. The size of the cuboid is 50 mm x 50 mm x 60 mm. Side vertical wall is maintained at a constant heat flux boundary condition. Visualisation of solid-liquid interface movement during melting of lead is carried out using neutron radiography at beamline E12 in CIRUS reactor in BARC. The beamline flux is 10(6) Neutrons/cm(2) s. Neutron radiography is a non-intrusive method for the characterization of melt front of melting of opaque materials. This method demonstrates dynamic capture of the progress of solid-liquid interface under the effects of natural convection in a non-intrusive manner. FLUENT is used as a numerical tool for the estimation of transient molten fraction and transient Nusselt number. Enthalpy-porosity method is employed for numerical investigation. Variation of molten fraction with time computed by numerical methodology compares reasonably well with those of experimental results. A correlation for average Nusselt number is suggested based on the numerical results and scale analysis. (c) 2012 Elsevier Masson SAS. All rights reserved.
 
Publisher ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
 
Date 2014-10-16T05:45:37Z
2014-10-16T05:45:37Z
2012
 
Type Article
 
Identifier INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 6115-27
http://dx.doi.org/10.1016/j.ijthermalsci.2012.06.014
http://dspace.library.iitb.ac.in/jspui/handle/100/15371
 
Language en