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Keywords: friction
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. December 2013, 135(12): 121302.
Paper No: HT-12-1610
Published Online: October 14, 2013
.... , 1959 , “ Transient Temperatures Attained in Disc Brakes ,” Br. J. Appl. Phys. , 10 , pp. 339 – 340 . 10.1088/0508-3443/10/7/311 [4] Majcherczak , D. , Dufrenoy , P. , and Nait-Abdelaziz , M. , 2005 , “ Third Body Influence on Thermal Friction Contact Problems: Application...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Heat Mass Transfer. January 2012, 134(1): 014503.
Published Online: November 18, 2011
...Zhipeng Duan Fully developed turbulent flow in noncircular ducts is examined, and simple models are proposed to predict the friction, heat and mass transfer in most common noncircular channels. It is found that the square root of cross-sectional area is the relatively more appropriate length scale...
Journal Articles
Publisher: ASME
Article Type: Max Jakob Award Paper
J. Heat Mass Transfer. October 2011, 133(10): 103001.
Published Online: August 11, 2011
... curve yielding simple heat transfer and friction factor correlations. The general transport equations developed for a single phase fluid in a heat exchange medium have many more integral and differential terms than the homogenized or classical continuum mechanics equations. Once these terms are dealt...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Heat Mass Transfer. May 2011, 133(5): 054503.
Published Online: February 2, 2011
...) and alumina ( Al 2 O 3 ) nanoparticles in the based fluid of water with the Prandtl number Pr = 7 to investigate the effect of the solid volume fraction parameter ϕ of the fluid and heat transfer characteristics. The skin friction coefficient, Nusselt number, and the velocity and temperature profiles...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. April 2011, 133(4): 041903.
Published Online: January 14, 2011
... showed that perforated twisted inserts of different geometry in a circular tube enhanced the heat transfer rate with an increase in friction factor and pumping power for turbulent flow. The pumping power, heat transfer coefficient, and effectiveness in the tube with the twisted tape inserts are found...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. February 2011, 133(2): 022502.
Published Online: November 2, 2010
... into account. Numerical results are obtained using an implicit finite-difference scheme. Both assisting and opposing flows are considered. The results for skin friction, heat transfer, and induced magnetic field coefficients are obtained and discussed for various parameters. The velocity, temperature...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. December 2010, 132(12): 121703.
Published Online: September 20, 2010
... and clarifying the combined roles of β and moisture diffusivity ( D = 1 × 10 − 8 – 1 × 10 − 5 m 2 / s ) on the mass transfer behavior, are obtained for practical applications. It is shown that the blockage augments the friction coefficients ( C f ) and Nusselt numbers (Nu) on the complete cylinder surface, where...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. December 2010, 132(12): 122401.
Published Online: September 17, 2010
... by frictional and thermal effects are computed for different coolants, inlet temperatures, Reynolds numbers, and channel aspect ratios. It was found that there exists an optimal Reynolds number range to operate the system due to the characteristics of the two different entropy sources, both related to the inlet...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. December 2010, 132(12): 121901.
Published Online: September 17, 2010
... tube wall, the air side performance for each sample is modeled based on the local heat transfer coefficients and friction factors obtained from experiments. The performance of each sample is evaluated based on a coefficient of performance (COP, defined as the ratio of the total heat removed...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Heat Mass Transfer. August 2010, 132(8): 084502.
Published Online: June 4, 2010
.... If the apex angle is obtuse, the local shear and heat transfer are large. Tables for the friction factor-Reynolds number products and Nusselt numbers are determined for various s and apex angles. Figure 1 shows the cross section of a sector duct, where the radius is L and the opening apex angle...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. June 2010, 132(6): 061801.
Published Online: March 19, 2010
...H. Huisseune; C. T’Joen; P. Brodeoux; S. Debaets; M. De Paepe In this study, the heat transfer and friction correlation of a single row heat exchanger with helically finned tubes are experimentally determined. The transversal tube pitch was parametrically varied. A detailed description of the test...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. April 2010, 132(4): 041011.
Published Online: February 22, 2010
... affects both the flow and heat transfer characteristics of the problem. It is found that the skin friction coefficient decreases with increasing K 1 and most of changes in the skin friction takes place in the range 0 < K 1 < 1 . The skin friction coefficient is found to be related to K 1 and Re x...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. April 2010, 132(4): 041001.
Published Online: February 17, 2010
... at the boundary. Analytical models are developed to predict friction factor and pressure drop in corrugated rough microtubes for continuum flow and slip flow. The developed model proposes an explanation on the observed phenomenon that some experimental pressure drop results for microchannel flow have shown...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. March 2010, 132(3): 031702.
Published Online: January 4, 2010
... consists of a glass tube coated with a transparent indium tin oxide heater film. For single-phase liquid flow (including superheated liquid) it was found that the measured Nusselt numbers and friction factors are in good agreement with the theoretical values expected from Poiseuille flow. Subsequently...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. September 2009, 131(9): 091901.
Published Online: June 22, 2009
... behind the tube. Nusselt number and friction factor both increase with the increase in the attack angle β , and the case of β = 30 deg has the maximum value of j / f . The effects of the tube row number on Nusselt number and friction factor are very small, and the heat transfer and fluid flow become...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. July 2009, 131(7): 071703.
Published Online: May 14, 2009
... spacing ( p ) to height ratio ( p / e ) ranges from 5 to 10. Results show higher heat transfer coefficients at smaller values of p / e and larger values of e / D , though at the cost of higher friction losses. Results also indicate that the thermal performance of the ribbed channel falls with increasing...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. June 2009, 131(6): 061703.
Published Online: April 9, 2009
.... The effect of these parameters on the flow and heat transfer of the problem has been studied and presented. It is found that the slip velocity parameter affect both the flow and heat transfer characteristics of the problem. It is found that the skin friction coefficient decreases with increasing K 1 and most...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. June 2009, 131(6): 061801.
Published Online: March 30, 2009
... calorimetric wind tunnel, heat transfer and pressure drop are measured at air face velocities from 0.5 m/s to 2.8 m/s for dry- and wet-surface conditions. Parametric effects related to geometry and operating conditions on heat transfer and friction performance of the heat exchangers are explored. Significant...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. February 2009, 131(2): 022901.
Published Online: January 5, 2009
... effect on system behavior, particularly around the transition regions. The interaction of saturated bubbles and subcooled liquid and associated change in heat transfer and frictional forces has been discussed in detail. Fluid stream has been observed to have different combinations of flow stream...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. February 2009, 131(2): 022502.
Published Online: January 5, 2009
... distances from the leading edge. Numerical results for the local skin-friction factor, wall temperature, and local Nusselt number are presented for Pr = 1 for a wide range of Gr x * ∕ Re x 5 ∕ 2 , where Gr x * is a local modified Grashof number and Re x is a local Reynolds number. The results indicate...
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