Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Journal of Enhanced Heat Transfer
Fator do impacto: 0.562 FI de cinco anos: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Imprimir: 1065-5131
ISSN On-line: 1026-5511

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

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v1.i3.100
pages 287-304

A Validated Procedure for the Prediction of Fully-Developed Nusselt Numbers and Friction Factors in Tubes with Two-Dimensional Rib Roughness

Carl A. James
Thermal and Fluid Dynamics Laboratory, Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS 39762
B. K. Hodge
Mechanical Engineering Department, Mississippi State University, Mississippi State, MS, USA 39762
Robert P. Taylor
Mechanical Engineering Department, Mississippi State University, Mississippi State, MS, USA 39762

RESUMO

A procedure based on the discrete element method has been developed and validated to compute Fanning friction factors and Nusselt numbers for fully-developed turbulent flow in tubes artificially roughened with two-dimensional, rectangular rib-type roughness elements spaced such that flow separation and reattachment occurs between ribs. The development is presented, and computed results are compared with appropriate experimental data sets from the literature. The method captures the salient features of flow in the hydraulically-smooth, transitionally-rough, and fully-rough flow regimes with no a priori specification of the flow regime. These comparisons indicate that the discrete element roughness method is consistently valid over the following range of rectangular rib geometries: rib-height to hydraulic-diameter ratios from k/D = 0.01 to 0.0625, rib width-to-height ratios from w/k = 1 to 0.254, and rib pitch-to-height ratios from L/k = 10 to 40.


Articles with similar content:

DIRECT NUMERICAL SIMULATIONS OF VARIABLE-ASPECT-RATIO TURBULENT DUCT FLOWS AT LOW TO MODERATE REYNOLDS NUMBERS
TSFP DIGITAL LIBRARY ONLINE, Vol.8, 2013, issue
Ricardo Vinuesa, Azad Noorani, Adrian Lozano-Duran, Phillipp Schlatter, Hassan M. Nagib, George K. El Khoury, Paul F. Fischer
Heat Transfer Characteristics in Forced Convection Through a Rectangular Channel with V-Shaped Rib Roughened Surfaces
International Heat Transfer Conference 15, Vol.23, 2014, issue
Alfonso Niro, Pasqualino Gramazio, Damiano Fustinoni, Luigi Pietro Maria Colombo
TURBULENT OPPOSING MIXED CONVECTION HEAT TRANSFER IN VERTICAL FLAT CHANNEL WITH SYMMETRICAL HEATING
Advances in Heat Transfer Engineering, Vol.1, 2003, issue
Povilas Poskas, Donatas Sabanskis, Robertas Poskas
DIRECT NUMERICAL SIMULATIONS OF TURBULENT BOUNDARY LAYERS OVER SQUARE-EDGED 2-D AND 3-D ROUGH WALLS
TSFP DIGITAL LIBRARY ONLINE, Vol.7, 2011, issue
Jae Hwa Lee, Hyung Jin Sung
NUMERICAL INVESTIGATION FOR NATURAL CONVECTION IN A VERTICAL OPEN-ENDED CHANNEL: COMPARISON WITH EXPERIMENTAL DATA
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2012, issue
Hervé Pabiou, Christophe Daverat , Christophe Menezo, Stephanie Giroux-Julien, Zoubir Amine , Shihe Xin