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Keywords: air
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Journal Articles
Article Type: Research Papers
J. Heat Transfer. March 2012, 134(3): 031022.
Published Online: January 20, 2012
... of V T = 0.5 L/min and flow rate of Q = 250 cm 3 /s. The numerical results confirmed in vivo measurement that the majority of heat transfer process takes place inside the nasal cavity. It is apparent that even for extreme cases (T ∞ = −30 °C and T wall = 37 °C), the inspired air approached the body...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. February 2012, 134(2): 021501.
Published Online: December 9, 2011
... and enhance heat transfer, in particular, for the steam-air mixture vapor. In the present paper, steam DWC heat transfer characteristics in the presence of noncondensable gas (NCG) were investigated experimentally on superhydrophobic and hydrophobic surfaces including the wetting mode evolution...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. November 2011, 133(11): 114501.
Published Online: August 31, 2011
...M. M. M. Abou-Ellail; T. W. Tong; Y. Li Catalytic combustion of hydrogen–air boundary layers involves the adsorption of hydrogen and oxygen into a platinum coated surface, chemical reactions of the adsorbed species, and the desorption of the resulting products. Re-adsorption of some produced gases...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. October 2011, 133(10): 102901.
Published Online: August 15, 2011
...Kyosung Choo; Sung Jin Kim In this study, heat transfer and fluid flow characteristics of nonboiling two-phase flow in microchannels were experimentally investigated. The effects of channel diameter (140, 222, 334, and 506 μ m) on the Nusselt number and the pressure drop were considered. Air...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. October 2011, 133(10): 101503.
Published Online: August 11, 2011
...X. Chesneau; S. Abide; B. Zeghmati The authors present a numerical investigation of turbulent mixed convection inside a wetted—wall tube. The mixture air and water vapor flows downwards the vertical tube. Turbulent momentum, heat and mass transfer equations combined with a low Reynolds number model...
Journal Articles
Article Type: Thermal Issues In Emerging Technologies
J. Heat Transfer. June 2011, 133(6): 060902.
Published Online: March 4, 2011
... conductivity but low permeability are investigated for convection heat transfer enhancement using air as coolant. Two novel heat sink structures are designed to reduce the fluid pressure drop. Both experimental and numerical approaches are adopted in the study. The experimental data show that the designed...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. April 2011, 133(4): 041601.
Published Online: January 11, 2011
...Xiaodong Nie; Richard Evitts; Robert Besant; John Bolster A new method for determining the heat transfer coefficient for air flowing steadily through beds of particles is presented. In this technique, a step change in the inlet air temperature is applied to a small test bed and temperature...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. January 2011, 133(1): 011002.
Published Online: September 27, 2010
...Clement Kleinstreuer; Zhe Zhang This review summarizes computer simulation methodologies of air-particle flow, results of drug-aerosol transport/deposition in models of the human respiratory system, as well as aspects of drug-aerosol targeting and associated inhalation devices. After a brief...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. December 2010, 132(12): 121701.
Published Online: September 17, 2010
... exergy is obtained when Ar is used as a fluid. The other gases (air, O 2 , N 2 ) have approximately the same total inlet exergy. As shown in Fig. 9 , increasing of the inlet pressure has increased the total output exergy and it is obtained from the results that the nozzle number...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. December 2010, 132(12): 121901.
Published Online: September 17, 2010
...Patrick T. Garrity; James F. Klausner; Renwei Mei The air side heat transfer performance of three aluminum foam samples and three modified carbon foam samples are examined for comparison with multilouvered fins often found in compact heat exchangers. The aluminum foam samples have a bulk density...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. October 2010, 132(10): 104501.
Published Online: July 23, 2010
... on the flow and heat transfer characteristics of the upward air. To capture the physics of the problem, the discretized conservation equations are solved by the finite-volume technique in an aggrandized computational domain that is much larger than the physical domain. Representative numerical results based...
Journal Articles
Article Type: Technical Papers
J. Heat Transfer. August 2007, 129(8): 939–950.
Published Online: January 9, 2007
... of heat transfer and chemical reactions in flowing methane-air mixtures over a platinum coated hot plate. Chemical reactions are included in the gas phase and in the solid platinum surface. In the gas phase, 16 species are involved in 49 elementary reactions. On the platinum hot surface, additional...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. April 2006, 128(4): 405–408.
Published Online: October 26, 2005
...Asterios Pantokratoras The steady laminar fully developed flow between two isothermal parallel plates is studied in this paper. The investigation concerns air, engine oil, and water taking into account the variation of all physical properties ( μ , k , and ρ ) with temperature. The results...
Journal Articles
Article Type: Technical Papers
J. Heat Transfer. March 2005, 127(3): 287–297.
Published Online: March 24, 2005
...Nesreen Ghaddar, ASME Fellow; Kamel Ghali; Jihad Harathani A two-dimensional model is developed for the modulated internal airflow, due to walking, in the gap between clothing and skin surface in the presence of clothing apertures. The normal airflow renewing the air layer through the fabric...
Journal Articles
Article Type: Technical Briefs
J. Heat Transfer. December 2005, 127(12): 1410–1415.
Published Online: January 25, 2005
... by propagating cracks to form a coherent structure covering the entire flame surface and the flame accelerates. The present paper reports a Schlieren photographic study of spherical flame propagation in methane—air, iso-octane—air and n -heptane—air premixtures at different initial conditions where the onset...
Topics: Flames, Methane
Journal Articles
Article Type: Research Papers
J. Heat Transfer. June 2005, 127(6): 571–580.
Published Online: December 22, 2004
...Adrian Briggs; Sritharan Sabaratnam Data are reported for condensation of steam with and without the presence of air on three rows of integral-fin tubes situated in a bank of plain tubes. The data cover a wide range of vapor velocities and air concentrations. Unlike previously reported data...
Journal Articles
Article Type: Technical Notes
J. Heat Transfer. October 2004, 126(5): 849–851.
Published Online: November 16, 2004
...A. S. Krishnan, Research Scholar; C. Balaji, Associate Professor; S. P. Venkateshan, Professor Results of an experimental study of natural convection and surface radiation between three parallel vertical plates, symmetrically spaced, with air as the intervening medium are presented. The analysis...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. August 2004, 126(4): 540–545.
Published Online: April 23, 2004
... on the heat transfer rate and pressure drop are investigated. That is, the surface temperature distribution along a heated section of the pipe, the pressure drop over this section, as well as the inlet temperature of the air were continuously monitored with a data acquisition system and recorded when steady...
Journal Articles
Article Type: Technical Papers
J. Heat Transfer. June 2002, 124(3): 530–537.
Published Online: May 10, 2002
...Kamel Ghali; Nesreen Ghaddar; Byron Jones The air penetration within a porous clothing system on a moving human being is an important physical process that considerably affects the heat and moisture resistance of the textile material. This effect of the coupled convection heat and mass exchange...
Journal Articles
Article Type: Technical Papers
J. Heat Transfer. June 2002, 124(3): 441–451.
Published Online: May 10, 2002
...Oronzio Manca; Sergio Nardini; Vincenzo Naso An experimental study on air natural convection on an inclined discretely heated plate with a parallel shroud below was carried out. Three heated strips were located in different positions on the upper wall. The distance between the walls, b...