caa a22 4500 463163370 CHVBK 20180406164754.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s11242-006-0010-3 doi (NATIONALLICENCE)springer-10.1007/s11242-006-0010-3 Kiwan Suhil Mechanical Engineering Department, King Saud University, P.O. Box 800, 11425, Riyadh, SA aut Thermal Analysis of Natural Convection Porous Fins [Elektronische Daten] [Suhil Kiwan] This work introduces a simple method of analysis to study the performance of porous fins in a natural convection environment. The method is based on using energy balance and Darcy's model to formulate the heat transfer equation. The thermal performance of porous fins is then studied for three types of fins: long fin, finite-length fin with insulated tip and a finite-length fin with tip exposed to a known convection coefficient. It is found from the analysis that the effect of different design and operating parameters such as: Ra number, Da number, thermal conductivity ratio, Kr and length thickness ratio on the temperature distribution along the fin is grouped into one newly defined parameter called S_H. The effect of the variation of S_H on the porous fin thermal performance is established. The effect of varying the fin length and thermal conductivity ratio on the heat transfer rate from the fin is investigated and compared with that for a solid fin at certain conditions. It is found that the heat transfer rate from porous fin could exceed that of a solid fin. It is also found that increasing the fin length and effective thermal conductivity enhances the heat transfer from the fin up certain limit, where a further increase in these parameters adds no improvement to the fin performance. Springer, 2006 Porous fin nationallicence natural convection nationallicence heat transfer nationallicence Darcy's model nationallicence Transport in Porous Media Kluwer Academic Publishers 67/1(2007-03-01), 17-29 0169-3913 67:1<17 2007 67 11242 https://doi.org/10.1007/s11242-006-0010-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11242-006-0010-3 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kiwan Suhil Mechanical Engineering Department, King Saud University, P.O. Box 800, 11425, Riyadh, SA aut NATIONALLICENCE 773 0- Transport in Porous Media Kluwer Academic Publishers 67/1(2007-03-01), 17-29 0169-3913 67:1<17 2007 67 11242 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer