Effect of Conductive Baffles on Natural Convection Heat Transfer
Two dimensional numerical study of the effect of high thermal conductive baffles on natural convection
heat transfer in saturated porous medium inside enclosure. The top and bottom surface of the enclosure are
insulated, the two vertical walls of the enclosure have different constant temperature, high conductive thin
baffles are attached on the two vertical walls. The governing equations were solved by finite difference method.
The results inserted for different value of Rayleigh number and different position s of the baffles with change in
length of baffles, when the baffles attached to the hot and cold walls in distances (0.25,0.75) respectively from
bottom surface, also when the baffles attached to the hot and cold walls in distance ( 0.75 , 0.25 ) respectively
from bottom surface. The length of baffles in the two cases changed in range ( 0.2 0.8 ). For the above cases
The Rayleigh number changed in range ( 150 750 ). The results are represented by streamlines and isotherm
lines to show the behavior of the fluid circulation and temperature distribution. Also some graphics had been
obtained which represent the relationship between Nusselt and Rayleigh numbers with the position and length of
baffles. The results show that increasing Rayleigh number leads to increase in the Nusselt number for two
cases. But in the two cases the increasing in the baffles length results a decreases in Nusselt number.
(Key words: natural convection, porous medium, Baffle, Enclosure)
Copyright (c) 2010 NUCEJ
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
- Each author retains the right to use the work for non-commercial purposes as well as for further research and spoken presentations.
- Each author retains the right to use the illustrations and research data in his/her future work.
- Only one offprint is provided free for each author. The authors can order offprints at the proof stage at certain rates depending on the number of additional copies required and the year of publication.
The publisher of the journal has full rights for publication of the submitted manuscripts, electronic and facsimile formats and for electronic capture, reproduction and licensing in all formats now and in perpetuity in the original and all derivative works.