Inverse Heat Conduction in a Composite Slab With Pyrolysis Effect and Temperature-Dependent Thermophysical Properties
The inverse heat conduction problem (IHCP) in a one-dimensional composite slab with rate-dependent pyrolysis chemical reaction and outgassing flow effects is investigated using the iterative regulariz...
The inverse heat conduction problem (IHCP) in a one-dimensional composite slab with rate-dependent pyrolysis chemical reaction and outgassing flow effects is investigated using the iterative regulariz...
Heat Transfer Characterization of Two Isothermal Circular Cylinders in Proximity
Heat transfer on two nearby isothermal circular cylinders of equal diameter immersed in a uniform crossflow at Re=120 and Pr=0.7 was numerically studied. We consider all possible arrangements of the t...
Heat transfer on two nearby isothermal circular cylinders of equal diameter immersed in a uniform crossflow at Re=120 and Pr=0.7 was numerically studied. We consider all possible arrangements of the t...
Investigation of Heat Transfer Enhancement Through Permeable Fins
J. Heat Transfer -- March 2010 -- Volume 132, Issue 3, 034503 (5 pages)
doi:10.1115/1.4000056
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Heat transfer through rectangular permeable fins is modeled and analyzed theoretically in this work. The free stream fluid flow is considered to be normal to the upper surface of the permeable fin. The flow across the permeable fin is permitted in this work. The continuity, momentum, and energy equations are solved for the fluid flow using a similarity transformation and an iterative tridiagonal finite difference method. As such, a correlation for the Nusselt number is generated as functions of the Prandtl number (Pr) and dimensionless suction velocity (fo) for 0.7<Pr
10 and 0<fo5, respectively. The energy equation for the permeable fin is generated and solved analytically using the developed correlation. It was found that permeable fins may have superiority in transferring heat over ordinary solid fins, especially at large fo values and moderate holes-to-fin surface area ratios. In addition, the critical holes-to-fin surface area ratios, below which the permeable fins transfer more heat than solid fins, is found to increase as Pr and fo increase. Finally, this work paves a way for a new passive method for enhancing heat transfer.
10 and 0<fo5, respectively. The energy equation for the permeable fin is generated and solved analytically using the developed correlation. It was found that permeable fins may have superiority in transferring heat over ordinary solid fins, especially at large fo values and moderate holes-to-fin surface area ratios. In addition, the critical holes-to-fin surface area ratios, below which the permeable fins transfer more heat than solid fins, is found to increase as Pr and fo increase. Finally, this work paves a way for a new passive method for enhancing heat transfer.
©2010 American Society of Mechanical Engineers
| History: | Received 10 April 2009; revised 30 July 2009; published 29 December 2009 | |
| doi: | http://dx.doi.org/10.1115/1.4000056 | |
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- 47.55.P-
Buoyancy-driven flows; convection - YEAR: 2010
