Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN Imprimir: 1940-2503
ISSN En Línea: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.v3.i1.30
pages 31-47

VISUALIZATION OF HEAT TRANSFER IN UNSTEADY LAMINAR FLOWS

Michel F. M. Speetjens
Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, PO Box 513, 5600 MB, The Netherlands
Anton A. van Steenhoven
Faculty of Mechanical Engineering, Energy Technology Section, Den Dolech 2, 5600MB, Eindhoven, The Netherlands

SINOPSIS

Heat transfer in fluid flows traditionally is examined in terms of temperature fields and heat-transfer coefficients. However, heat transfer may alternatively be considered as the transport of thermal energy by the total convective-conductive heat flux in a way analogous to the transport of fluid by the flow field1. The paths followed by the total heat flux are the thermal counterpart to fluid trajectories and facilitate heat-transfer visualization in a similar manner as flow visualization. This has great potential for applications in which insight into the heat fluxes throughout the entire configuration is essential (e.g., cooling systems, heat exchangers). To date, this concept has been restricted primarily to steady flows; generalization to unsteady flows is a very recent development and depends on representation of heat transfer as the "motion" of a virtual "fluid" subject to continuity. The present study expands on this generalization and demonstrates its application for thermal analyses by way of examples. Furthermore, a fundamental analogy between fluid motion and heat transfer is addressed that may pave the way to future heat-transfer studies by well-established geometrical methods from laminar-mixing studies.


Articles with similar content:

VISUALISATION OF HEAT TRANSFER IN LAMINAR FLOWS
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2009, issue
Michel F. M. Speetjens, Anton A. van Steenhoven
Flow Structures and Heat Transfer in Submerged and Free Laminar Jets
International Heat Transfer Conference 15, Vol.1, 2014, issue
Reinhold Kneer, Wilko Rohlfs, Claas Ehrenpreis, Herman Haustein
EXPANDED USE OF CFD IN THE CHEMICAL PROCESS INDUSTRY
ICHMT DIGITAL LIBRARY ONLINE, Vol.4, 2001, issue
Michael S. Engelman, Dipankar Choudury, Liz Marshall
OVERVIEW OF HEAT PIPE STUDIES DURING THE PERIOD 2010−2015
Interfacial Phenomena and Heat Transfer, Vol.4, 2016, issue 1
Valerie Sartre, Sameer Khandekar, Stephane Lips, Jocelyn Bonjour, Frederic Lefevre
THERMODYNAMIC OPTIMIZATION IN HEAT TRANSFER
International Heat Transfer Conference 11, Vol.1, 1998, issue
Adrian Bejan