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1-20 of 28
Keywords: Entropy Generation
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Journal Articles
Muhammet Nasıf Kuru, Şaban Ünal, Metin Efe, Necdet Duman, İlyas Karasu, Mehmet Tahir Erdinç, Orhan Aydin
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. December 2024, 146(12): 123301.
Paper No: HT-24-1093
Published Online: August 22, 2024
...) and modified shaped plate fin heat sinks (MS-PFHSs) are numerically investigated. The objective functions are minimizations of base plate temperature, entropy generation and mass. For both PFHSs and MS-PFHSs, optimization variables include inlet velocity ( V in ), fin height ( H fin ), and number of fins ( N L...
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
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. October 2023, 145(10): 101005.
Paper No: HT-22-1784
Published Online: July 17, 2023
...Abdeslam Omara; Abderrahim Bourouis; Rabah Bouchair In this paper, entropy generation due to double-diffusive natural convection inside a partly porous enclosure under sinusoidal wall heating is numerically analyzed. The resulting dimensionless coupled partial differential equations are discretized...
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
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. June 2022, 144(6): 062601.
Paper No: HT-21-1551
Published Online: April 5, 2022
... generation due to heat transfer and fluid friction and the total entropy generation are determined for different parameters. The results are presented graphically in streamlines, isotherms, and average Nusselt numbers. Three different configurations of active region arrangement are considered in this study...
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...
Topics:
Cavities,
Design,
Entropy,
Heat sinks,
Heat transfer,
Microchannels,
Reynolds number,
Thermal resistance,
Flow (Dynamics),
Friction
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
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. January 2020, 142(1): 012505.
Paper No: HT-19-1110
Published Online: November 11, 2019
... number ( 0.1 ≤ Ri ≤ 5 ), nanoparticle bulk volume fraction (0 ≤ φ b ≤ 0.05) on the mixed convection of the nanofluid is studied by considering the inclination angle of the enclosure to vary between 0 deg and 60 deg. The entropy generation as well as the Bejan number is evaluated to illustrate...
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
Publisher: ASME
Article Type: Research-Article
J. Heat Mass 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...
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
Optimization of Pin-Fins for a Heat Exchanger by Entropy Generation Minimization and Constructal Law
Publisher: ASME
Article Type: Research-Article
J. Heat Mass 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
Publisher: ASME
Article Type: Research-Article
J. Heat Mass 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...
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...
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