Transient Methods of Thermal Properties Measurement on Fibrous Materials
Fibrous material is a complex porous medium and steady test methods are the main test approaches we currently depend on to study the heat transfer properties. The application of unsteady test methods ...
Fibrous material is a complex porous medium and steady test methods are the main test approaches we currently depend on to study the heat transfer properties. The application of unsteady test methods ...
Optimization of a Pin Fin With Variable Base Thickness
A pin fin with variable fin base thickness is optimized using a two-dimensional analytic method. The values of the inner wall temperature and fin volume are given as constants. The fin base temperatur...
A pin fin with variable fin base thickness is optimized using a two-dimensional analytic method. The values of the inner wall temperature and fin volume are given as constants. The fin base temperatur...
Natural Convection From a Porous Cavity With Sublayers of Nonuniform Thickness: A Lumped System Analysis
J. Heat Transfer -- March 2010 -- Volume 132, Issue 3, 032602 (6 pages)
doi:10.1115/1.3213527
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A numerical study has been performed to further investigate the flow and temperature fields in layered porous cavity. The geometry considered is a two-dimensional square cavity comprising of three or four vertical sublayers with nonuniform thickness and distinct permeability. The cavity is subjected to differential heating from the vertical walls. The results obtained are used to further evaluate the capacity of the lumped-system analysis in the prediction of heat transfer results of layered porous cavities. It has been found that predictions by the lumped-system model are reasonably good for the range of Rayleigh numbers encountered in engineering applications. In addition, the predictions improve when the number of sublayers increases as well as the sublayer thickness becomes more uniform. Thus, it proves that the lumped-system analysis can offer a quick estimate of heat transfer result from a layered porous cavity with reasonable accuracy.
©2010 American Society of Mechanical Engineers
| History: | Received 9 December 2008; revised 2 July 2009; published 30 December 2009 | |
| doi: | http://dx.doi.org/10.1115/1.3213527 | |
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