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Keywords: Nusselt number
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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
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. February 2024, 146(2): 021801.
Paper No: HT-23-1048
Published Online: November 21, 2023
... distinct asymptotic regions, with the first one representing fully developed heat transfer and the second one representing isothermal states. The fully developed Nusselt number ( N u fd ) is found to rise first, before dropping continuously with rise in Knudsen number ( Kn ) . The pair of K n and maximum N...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. December 2023, 145(12): 121602.
Paper No: HT-23-1215
Published Online: September 4, 2023
... of psychrometric data. The results show that the Sherwood number and the Nusselt number reach a steady value after an initial transient period for the drop subjected to Hagen-Poiseuille flow. A parametric study is conducted to investigate the effect of drop deformation on the rate of evaporation. It is observed...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. August 2023, 145(8): 083901.
Paper No: HT-22-1636
Published Online: March 20, 2023
... redistribution at a plane, which is beneficial, (b) the statistical axial-velocity deviates from the standard logarithmic law at a Reynolds number of 5000, and (c) the ratio of surface-area-averaged Nusselt number between the lower half and upper half of the tube is 4–12. Some important recommendations...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. July 2023, 145(7): 072301.
Paper No: HT-22-1148
Published Online: March 20, 2023
..., 1/2, and 3/4 on the cooling process are studied. The distributions of surface temperature are acquired experimentally using a thermal infrared camera. As well, the local Nusselt number (Nu), stagnation point Nusselt number ( Nu st ), average Nusselt number ( Nu ¯ ), and average Nusselt number ratio...
Includes: Supplementary data
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. July 2023, 145(7): 072502.
Paper No: HT-22-1469
Published Online: February 8, 2023
..., thermal conductivity ratio, thickness ratio, and Reynolds number on peripheral heat flux, temperature, and Nusselt number profiles. Isotherms show a multidirectional thermal gradient for low thermal conductivity ratios, whereas only an axial thermal gradient is seen for higher thermal conductivity ratios...
Includes: Supplementary data
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. February 2023, 145(2): 022901.
Paper No: HT-22-1375
Published Online: November 22, 2022
...Shailesh Kumar Shakya; Yadaba Mahanand; Jnana Ranjan Senapati This study analyzes the thermo-fluid characteristics of the solar air heater duct (SAHD) consisting of W-shaped transverse ribs on the collector plate. The results of the study are presented with the appearance of Nusselt number...
Includes: Supplementary data
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Heat Mass Transfer. September 2022, 144(9): 094502.
Paper No: HT-22-1012
Published Online: June 22, 2022
... in experimental data reduction, leading to apparently very low Nusselt number estimation. Moreover, this erroneous data interpretation is also linked to the prediction of a strong Reynolds number dependency of the average Nusselt number in the laminar flow regime. e-mail:  anakin@iitkgp.ac.in 1...
Journal Articles
Journal Articles
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. April 2022, 144(4): 042001.
Paper No: HT-21-1404
Published Online: January 25, 2022
... can improve the comprehensive heat transfer performance parameter (Φ), and the maximum increases of Φ are 11.0%, 14.3%, 12.2%, and 14.7% for SC, SR, SD, and SFS cases, respectively. It is noted that the Nusselt number of heated SFS-shaped diverter surface is also the highest. Besides, the influences...
Includes: Supplementary data
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. November 2021, 143(11): 112902.
Paper No: HT-20-1550
Published Online: September 22, 2021
... Nusselt number (Nu avg ), friction coefficient ( C f,avg ), and maximum temperature ( T ¯ max ) are optimized. The operating parameters considered for optimization include heat generation term ( S ¯ q ), Reynolds number (Re), conduction-convection parameter ( ζ cc ), aspect ratio (Ar), and spacing between...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. August 2021, 143(8): 082601.
Paper No: HT-20-1789
Published Online: June 17, 2021
... clockwise (CW), whereas, in the other two cases, cylinders rotate in opposite directions (CW–CCW and CCW–CW). Simulations have been carried out over a broad range of Reynolds number (from 0.5 to 500) and angular speeds (a dimensionless value from 0 to 10). The average Nusselt number values at the isothermal...
Includes: Supplementary data
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. June 2021, 143(6): 063301.
Paper No: HT-20-1209
Published Online: April 21, 2021
... using split shows better result with the highest heat transfer increment of nearly 25%. Further, in order to maximize Nusselt number (Nu), a single objective cuckoo search optimization analysis is done by adopting the response surface method. After analyzing the optimization, it is found...
Includes: Supplementary data
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. April 2021, 143(4): 042602.
Paper No: HT-20-1514
Published Online: February 22, 2021
...), angular pitch ( θ ), cylinder length to diameter ratio (L/D), and Rayleigh number (Ra) spanning from 0.005 to 0.08, 0.1 to 0.3333, 30 deg to 180 deg, 2 to 20, and 10 4 to 10 8 , respectively. It has been found that the average surface Nusselt number (Nu) for the outer surface increases with the diameter...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. February 2021, 143(2): 021801.
Paper No: HT-20-1044
Published Online: November 16, 2020
... wall temperature boundary, unyield region of temperature-dependent model at rear of circular tube is smaller due to a higher shear rate and lower average viscosity. On the surface of circular tube, local skin drag coefficient first increases and then decreases, and local Nusselt number decreases near...
Includes: Supplementary data
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. October 2020, 142(10): 102106.
Paper No: HT-20-1042
Published Online: July 17, 2020
...-shaped rib design was performed using various geometric parameters related to the heel-angle, toe-angle, slope-height, and rib-width to find their effect on the Nusselt number, temperature on the ribbed wall, friction factor ratio of the channel, and thermal performance factor. The numerical results...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. June 2020, 142(6): 061805.
Paper No: HT-19-1707
Published Online: April 27, 2020
... h ¯ = average heat transfer coefficient, W m –2 K –1 I ( u 0 ) = integral defined by Eq. (B7) k = thermal conductivity of fluid, W m –1 K –1 Nu x = local Nusselt number, hx / k Nu ¯ L = average Nusselt number...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. June 2020, 142(6): 062501.
Paper No: HT-19-1609
Published Online: April 24, 2020
... nonuniformity reduces 7.6 °C, 24 °C, and 7.4 °C by the MPFHS MI,F , MPFHS MI,FH , and MPFHS MI,SH designs, respectively. Average Nusselt number for the cases MPFHS MI,F , MPFHS MI,FH , and MPFHS MI,SH is found 26.7%, 52.3%, and 70.9% higher than the conventional design of MPFHS. Overall thermal performance...