(2013), "2012 Awards for excellence", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 23 No. 1. https://doi.org/10.1108/hff.2013.13423aaa.002
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Copyright © 2013, Emerald Group Publishing Limited
2012 Awards for excellence
Article Type: Awards for excellence From: International Journal of Numerical Methods for Heat & Fluid Flow, Volume 23, Issue 1
The following article was selected for this year's Outstanding Paper Award for International Journal of Numerical Methods for Heat & Fluid Flow
"Numerical simulation of natural convection and phase-change in a horizontal Bridgman pparatus"
Diego CelentanoDepartamento de Ingeniería Mecánica y Metalú rgica, Pontificia Universidad Catô lica de Chile, Santiago, Chile
Marcela CruchagaDepartamento de Ingenieriá Mecánica, Universidad de Santiago de Chile, Santiago, Chile
Jorge RomeroDepartamento de Ingeniería Metalúrgica, Universidad de Santiago de Chile,Santiago, Chile
Mohammed El GanaouiFaculté des Sciences, Université de Limoges, Limoges, France
Purpose – The purpose of this paper is to present a 2D numerical simulation of natural convection and phase-change of succinonitrile in a horizontal Bridgman apparatus. Three different heat transfer mechanisms are specifically studied: no growth, solidification and melting.
Design/methodology/approach – The analysis is carried out with a preexisting thermally coupled fixed-mesh finite element formulation for generalized phase-change problems.
Findings – In the three cases analyzed, the predicted steady-state liquid-solid interfaces are found to be highly curved due to the development of a primary shallow cell driven by the imposed furnace temperature gradient. In the no growth case, the heating and cooling jackets remain fixed and, therefore, a stagnant liquid-solid interface is obtained. On the other hand, the phase transformation in the solidification and melting cases is, respectively, controlled by the forward and backwardmovement of the jackets. In these last two growth conditions, the permanent regime is characterized by a moving liquid-solid interface that continuously shifts with the same velocity of the jackets. The numerical results satisfactorily approach the experimental measurements available in the literature.
Originality/value – The numerical simulation of the no growth, solidification and melting cases in a horizontal Bridgman apparatus using a finite element based formulation is the main contribution of this work. This investigation does not only provide consistent results with those previously computed via different numerical techniques for the no growthandsolidificationconditionsbutalsoreports onoriginalnumericalpredictionsfor themeltingproblem.Moreover, all the obtained solid-liquid interfaces are validated with experimental measurements existing in the literature.
Keywords Heat transfer, Organic compounds, Phase transformations, Simulation www.emeraldinsight.com/10.1108/09615531111123065
This article originally appeared in Volume 21 Number 4, 2011, pp. 366-76 International Journal of Numerical Methods for Heat & Fluid Flow
"Effect of chemical reaction on heat and mass transfer by mixed convection flow about a sphere in a saturated porous media"
A.M. Rashad, A.J. Chamkha and S.M.M. El-Kabeir
This article originally appeared in Volume 21 Number 4, 2011, International Journal of Numerical Methods for Heat & Fluid Flow
"Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream"
Azizah Mohd Rohni, Syakila Ahmad and Ioan Pop
This article originally appeared in Volume 21 Number 7, 2011, International Journal of Numerical Methods for Heat & Fluid Flow
"Integral transforms solution for flow development in wavy wall ducts"
Roseane L. Silva, Joã o N.N. Quaresma, Carlos A.C. Santos and Renato M. Cotta
This article originally appeared in Volume 21 Number 2, 2011, International Journal of Numerical Methods for Heat & Fluid Flow
Professor Ioan PopUniversity of Cluj, Romania
Professor Ali ChamkaPublic Authority for Applied Education & Training, Kuwait