Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
Journal of Enhanced Heat Transfer
Factor de Impacto: 0.562 Factor de Impacto de 5 años: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Imprimir: 1065-5131
ISSN En Línea: 1026-5511

Volumes:
Volumen 26, 2019 Volumen 25, 2018 Volumen 24, 2017 Volumen 23, 2016 Volumen 22, 2015 Volumen 21, 2014 Volumen 20, 2013 Volumen 19, 2012 Volumen 18, 2011 Volumen 17, 2010 Volumen 16, 2009 Volumen 15, 2008 Volumen 14, 2007 Volumen 13, 2006 Volumen 12, 2005 Volumen 11, 2004 Volumen 10, 2003 Volumen 9, 2002 Volumen 8, 2001 Volumen 7, 2000 Volumen 6, 1999 Volumen 5, 1998 Volumen 4, 1997 Volumen 3, 1996 Volumen 2, 1995 Volumen 1, 1994

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v3.i4.30
pages 273-280

Heat Transfer and Skin Friction Comparison of Dimpled Versus Protrusion Roughness

Mark E. Kithcart
Mechanical Engineering Department North Carolina A&T State University Greensboro, NC 27411
David E. Klett
Mechanical Engineering Department North Carolina A&T State University Greensboro, NC 27411

SINOPSIS

This paper presents results of skin friction and heat transfer measurements made on flat plates with closely-spaced, three-dimensional surface roughness elements (hemispherical dimples, hemispherical protrusions, and rectangular protrusions) in turbulent boundary-layer flow at velocities ranging from 18 to 40 m/s (roughness Reynold's nos. from 1500 to 4000). The roughness element densities for each plate were chosen using Simpson's sand-grain roughness correlation to study the effects of spacing on drag and heat transfer in the vicinity of the peak of the Simpson-Dvorak correlation curve. The data is presented in terms of the efficiency factor, n = (Str/Sts/(Cfr/Cfs), to provide a means of comparing the effects on skin friction and heat transfer collectively. Dimpled surfaces have the advantage of significantly increasing heat transfer at a lower penalty in increased drag compared to the protrusion roughness studied.


Articles with similar content:

PERFORMANCE COMPARISON OF ENHANCED FIN GEOMETRIES USED IN FIN-AND-TUBE HEAT EXCHANGERS
International Heat Transfer Conference 11, Vol.16, 1998, issue
Hie-Chan Kang, Ralph L. Webb
Influence of parameters of array of dimples on thermohydraulic efficiency
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2015, issue
S.A. Burtcev, Yu. A. Vinogradov , Mark M. Strongin, N. A. Kiselev
Non-Newtonian Fluid Flow around Ellipsoidal Particles
International Journal of Fluid Mechanics Research, Vol.38, 2011, issue 2
Yazan Taamneh
A COMPUTATIONAL STUDY OF FLOW AND HEAT TRANSFER IN A CHANNEL WITH AN ARRAY OF NOVEL SURFACE ROUGHNESS ELEMENT
Journal of Enhanced Heat Transfer, Vol.26, 2019, issue 2
Ritesh Gaur, Bhamidi V. S. S. S. Prasad, Ganesan Sabbani
THE EFFECTS OF SIDEWALLS ON PRESSURE DROP AND HEAT TRANSFER IN A PIN-FINNED MICROCHANNEL
International Heat Transfer Conference 16, Vol.19, 2018, issue
Hongbin Yan, Gongnan Xie, Jingzhe Xie