Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
Heat Transfer Research
Impact-faktor: 0.404 5-jähriger Impact-Faktor: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

Volumes:
Volumen 50, 2019 Volumen 49, 2018 Volumen 48, 2017 Volumen 47, 2016 Volumen 46, 2015 Volumen 45, 2014 Volumen 44, 2013 Volumen 43, 2012 Volumen 42, 2011 Volumen 41, 2010 Volumen 40, 2009 Volumen 39, 2008 Volumen 38, 2007 Volumen 37, 2006 Volumen 36, 2005 Volumen 35, 2004 Volumen 34, 2003 Volumen 33, 2002 Volumen 32, 2001 Volumen 31, 2000 Volumen 30, 1999 Volumen 29, 1998 Volumen 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2015010648
pages 203-217

ESTIMATION OF THE LOSS COEFFICIENT FOR CONDUIT BENDS WITH CIRCULAR CROSS SECTION BY THE SECOND LAW APPROACH

Haochun Zhang
School of Energy Science and Engineering, Harbin institute of Technology, Harbin, 150001, China
Y.-Y. Guo
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
Hai-Yan Yu
School of Energy Science and Engineering, Harbin Institute of Technology
L.-M. Yan
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
Y. Ji
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
Y. Li
Institute of Composite Material, Harbin Institute of Technology, Harbin, China

ABSTRAKT

Energy loss in a flow field occurs due to the dissipation of mechanical energy, and an accurate estimation of the loss coefficient is important for both energy conservation and engineering design. In the current study, the concept of the head loss coefficient K of a local structure for turbulent flows was extended to a laminar flow. The thermodynamic definition of K is proposed, and the value of K can be simulated by integrating the entropy production of the flow field. The Re dependence of K for a 90° bend with a circular cross section and 90° bend combinations was investigated using the second law approach. In addition, the correlation between K and the bending curvature was also derived.


Articles with similar content:

THEORETICAL AND EXPERIMENTAL STUDY OF TURBUlENCE EFFECTS ON HEAT TRANSFER AROUND THE STAGNATION POINT OF A CYLINDER
International Heat Transfer Conference 7, Vol.6, 1982, issue
Yasuo Mori, Kunio Hijikata, H. Yoshida
ELASTIC STRESS ACTS ON ELASTIC TURBULENCE OF VISCOELASTIC FLUID FLOW IN CURVY MICROCHANNEL
International Heat Transfer Conference 16, Vol.9, 2018, issue
Sichao Tan, Hongna Zhang, Feng-Chen Li, Dongyang Li
Numerical study on turbulent convective heat transfer of supercritical fluid flows with integral method
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2015, issue
F. Cao, Y. Mao, W. Qi
ON THE INVESTIGATION OF A STRAIN AND ROTATION DEPENDENT SUBGRID-SCALE MODEL USING THE DYNAMIC PROCEDURE
TSFP DIGITAL LIBRARY ONLINE, Vol.4, 2005, issue
Martin Oberlack, Ingmar Wendling
RESPONSES OF TURBULENT CHANNEL FLOWS TO TEMPORAL ACCELERATION
TSFP DIGITAL LIBRARY ONLINE, Vol.10, 2017, issue
Seo Yoon Jung, Kyoungyoun Kim