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Keyword: entropy generation
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Journal Articles
Article Type: Research-Article
J. Heat Transfer. October 2019, 141(10): 102001.
Paper No: HT-18-1496
Published Online: September 13, 2019
...M. Ijaz Khan; Sumaira Qayyum; T. Hayat; M. Waqas; A. Alsaedi This paper aims to investigate the entropy generation in slip flow due to double rotating disks. Heat equation is formulated by considering effects of viscous dissipation, Joule heating and nonlinear thermal radiation. Brownian motion...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. August 2019, 141(8): 081801.
Paper No: HT-18-1709
Published Online: June 12, 2019
...Bipin Kumar; Anil Kumar Patil; Siddharth Jain; Manoj Kumar The present work deals with the study of entropy generation in circular tube fitted with perforated twisted tape (PTT) insert with multiple V cuts. Experimental data pertaining to heat transfer and frictional losses are collected for solid...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. August 2019, 141(8): 082401.
Paper No: HT-18-1619
Published Online: June 12, 2019
.... New thermophysical property models have been proposed for hybrid nanofluids with different particle shapes and mixture ratio. Effects of power input, loop diameter, loop height, loop inclination and heater/cooler inclination on steady-state mass flow rate, effectiveness, and entropy generation are...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. February 2019, 141(2): 022002.
Paper No: HT-18-1087
Published Online: December 13, 2018
...M. I. Afridi; M. Qasim; O. D. Makinde This study examines the effects of viscous and porous dissipation on entropy generation in the viscoelastic fluid flow induced by a linearly stretching surface. Analysis of mass transfer is also performed. Consideration of rheological characteristics of...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. January 2019, 141(1): 011801.
Paper No: HT-18-1149
Published Online: October 8, 2018
... (tubular router) placed in the rectangular duct. The pin fins are installed periodically at the top and bottom plates of the duct perpendicular to the flow direction, structured in-line, and staggered sheet layouts. The entropy generation in the flow domain of the channels is calculated to demonstrate the...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. June 2015, 137(6): 061901.
Paper No: HT-14-1145
Published Online: June 1, 2015
...-fin heat exchanger the stored thermal energy can be increased by 10.2%. pin-fin entropy generation constructal law optimization computational fluid dynamics Employing pin-fins on a heated surface promotes heat transfer performance. Given their inexpensive and simple structure, pin...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. December 2014, 136(12): 123001.
Paper No: HT-13-1658
Published Online: October 21, 2014
... Kuznetsov. 20 12 2013 30 06 2014 The present paper reports a study about entropy generation analysis for the case of chemical absorption of a gas into laminar falling liquid film. The CO 2 absorption into monoethanolamine (MEA) aqueous solutions has been considered. Temperature and...
Journal Articles
Article Type: Discussions
J. Heat Transfer. May 2014, 136(5): 055501.
Paper No: HT-13-1519
Published Online: March 6, 2014
... the entropy generation minimization (EGM) advances of the past four decades (reviewed in Refs. [ 7 , 12 ]) and republish them as new. This is clear, but it is only half of the slight of hand. Reference [ 1 ] also teaches that the principle of “minimization of entransy dissipation” accounts for the...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. February 2014, 136(2): 021701.
Paper No: HT-12-1295
Published Online: November 5, 2013
..., 2013. Assoc. Editor: W. Q. Tao. 19 06 2012 11 07 2013 In this paper, laminar forced convection and entropy generation in a counter flow microchannel heat exchanger (CFMCHE) with two different working fluids in hot and cold channels, i.e., pure water and Al 2 O 3...
Journal Articles
Article Type: Research-Article
J. Heat Transfer. November 2012, 134(11): 111801.
Published Online: September 28, 2012
... evaporator, and a superheater. In this study, a water tube HRSG is considered and its main design features are deduced from the minimization of the entropy generation by using the constructal theory. Entropy generation is obtained by considering all irreversibilities associated with the processes...
Journal Articles
Article Type: Forced Convection
J. Heat Transfer. October 2012, 134(10): 101704.
Published Online: August 7, 2012
...Omid Mahian; Shohel Mahmud; Saeed Zeinali Heris In this paper, the effects of uncertainties in physical properties on predicting entropy generation for a steady laminar flow of Al 2 O 3 –ethylene glycol nanofluid ( 0 ≤ φ ≤ 6 % ) between two concentric rotating cylinders are investigated. For this...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. March 2012, 134(3): 031003.
Published Online: January 10, 2012
...Heinz Herwig Entropy generation in a velocity and temperature field is shown to be very significant in momentum and heat transfer problems. After the determination of this postprocessing quantity, many details about the physics of a problem are available. This second law analysis (SLA) is a tool...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. April 2011, 133(4): 044503.
Published Online: January 13, 2011
... reheater. The effects of inlet conditions of the working fluids on the heat transfer characteristics were correlated via entropy generation number and exergy loss. The variation of the effectiveness with the number of transfer unit of heat recovery unit was calculated and discussed in terms of literature...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. November 2010, 132(11): 111703.
Published Online: August 13, 2010
...A. Arikoglu; G. Komurgoz; I. Ozkol; A. Y. Gunes The present work examines the effects of temperature and velocity jump conditions on heat transfer, fluid flow, and entropy generation. As the physical model, the axially symmetrical steady flow of a Newtonian ambient fluid over a single rotating disk...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. September 2010, 132(9): 091701.
Published Online: June 28, 2010
...Mohammad Shanbghazani; Vahid Heidarpoor; Marc A. Rosen; Iraj Mirzaee The entropy generation is investigated numerically in axisymmetric, steady-state, and incompressible laminar flow in a rotating single free disk. The finite-volume method is used for solving the momentum and energy equations...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. February 2009, 131(2): 024503.
Published Online: December 29, 2008
... porosity. The thermal performance was evaluated by the ratio of the Nusselt number with and without a high porous material and the entropy generation. It was recognized that the high porous material was effective in low Reynolds numbers and the Reynolds number, which minimized the entropy generation...
Journal Articles
Article Type: Technical Papers
J. Heat Transfer. October 2001, 123(5): 999–1005.
Published Online: February 20, 2001
... based on an assessment of entropy generation rate. The present report summarizes the research conducted to date and presents a study on the optimization of cooling systems. Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER . Manuscript received by the Heat...