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Keywords: entropy generation
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. February 2024, 146(2): 021004.
Paper No: HT-23-1117
Published Online: November 21, 2023
... with the separation of variables method. Expressions for the Nusselt number, the nondimensional entropy generation rate, and the Bejan number were further deduced. The influences of crucial factors, including viscous dissipation, rarefaction, aspect ratio, and fluid axial heat conduction, have been carefully...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. June 2023, 145(6): 063301.
Paper No: HT-22-1541
Published Online: January 12, 2023
...) are frequently used for cooling electronic devices. Optimum thermal designs of PFHSs are explored in this study using a teaching-learning-based-optimization (TLBO) algorithm where entropy generation ( S ˙ gen ) minimization, profit factor ( J ) maximization, base plate temperature excess ( θ b ) minimization...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. April 2022, 144(4): 042603.
Paper No: HT-21-1619
Published Online: February 10, 2022
...Vikrant Chandrakar; Arnab Mukherjee; Jnana Ranjan Senapati; Ashok Kumar Barik A convection system can be designed as an energy-efficient one by making a considerable reduction in exergy losses. In this context, entropy generation analysis is performed on the infrared suppression system numerically...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. January 2022, 144(1): 012001.
Paper No: HT-21-1179
Published Online: November 8, 2021
...Bharath Pidaparthi; Peiwen Li; Samy Missoum In this work, a tube with internal helical fins is analyzed and optimized from an entropy generation point of view. Helical fins, in addition to providing heat transfer enhancements, have the potential to level the temperature of the tube under nonuniform...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. April 2021, 143(4): 042101.
Paper No: HT-20-1344
Published Online: February 22, 2021
... number (10 4 ≤ Ra ≤ 10 8 ), Reynolds number (Re D < 2100), and aspect ratio (1 ≤ L/D ≤ 20). Entropy generation in the system is predominantly triggered by heat transfer in comparison to fluid friction. The irreversibility incurred progressively increases with an increase in Ra and Re D . The variation...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. September 2020, 142(9): 092503.
Paper No: HT-19-1358
Published Online: July 8, 2020
... of thermodynamics, thermal resistance (R th ) is used to investigate the resistance of any configuration to flow of heat comparing at same pumping power. Moreover, the second law of thermodynamics is applied to quantify the rate of entropy generation ( S ˙ gen ) and transport efficiency ( η t ) for MCHS...
Includes: Supplementary data
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. September 2020, 142(9): 092502.
Paper No: HT-20-1019
Published Online: July 7, 2020
..., and thermal performance index (TPI). Furthermore, the results are analyzed by using the entropy generation. As a result of secondary flows and enhanced convective heat transfer area, all cases at H/D ratio of 0.3 demonstrate enhanced heat transfer performance at an increase of 18.0–34.7% on Nusselt number...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass 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
Publisher: ASME
Article Type: Research-Article
J. Heat Mass 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
Publisher: ASME
Article Type: Research-Article
J. Heat Mass 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...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass 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...
Journal Articles
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Discussions
J. Heat Mass Transfer. May 2014, 136(5): 055501.
Paper No: HT-13-1519
Published Online: March 6, 2014
... known measures of irreversibility such as entropy generation and lost exergy (destroyed available work). Furthermore, the “principle of entransy dissipation minimization” adds nothing to existing work based on minimum entropy generation, minimum thermal resistance, and constructal law. The broader trend...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. February 2014, 136(2): 021701.
Paper No: HT-12-1295
Published Online: November 5, 2013
...Shahabeddin K. Mohammadian; Hamid Reza Seyf; Yuwen Zhang Fig. 10 Effect of particles size on effectiveness and pumping power Figure 11 depicts the effect of particles size on the entropy generation rates caused by individual and combined sources for nanofluid flow in CFMCHE...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. November 2012, 134(11): 111801.
Published Online: September 28, 2012
... = number of transfer unit N L = number of rows deep Ns = entropy generation number Nu = Nusselt number N w = number of tubes wide P = pressure (Pa) Q · = rate of heat transfer (kJ) Re = Reynolds number Pr = Prandtl number R...