Joo, YounghwanKim, Sung Jin2015-04-242015-04-242014Joo, Y & Kim, SJ 2014, 'Comparison of thermal characteristics between the plate-fin and pin-fin heat sinks in natural convection', Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.97817759206873http://hdl.handle.net/2263/44718Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.Thermal performances of optimized plate-fin and pin-fin heat sinks with vertical base plate were compared in natural convection. Comparison is performed under the same base plate dimensions and fin height condition. A Nusselt number correlation for plate-fin array was adopted to optimize plate-fin heat sinks. For pin-fin heat sinks, a new correlation of heat transfer coefficient was developed. With the new correlation, diameter, horizontal spacing, and vertical spacing of pin-fin array are optimized. Optimized plate-fin and pin-fin heat sinks are compared analytically. They were compared for various base plate dimensions, fin heights, temperature differences. In most regions, plate-fin heat sinks show better performance than pin-fin heat sinks.5 pagesPDF© 2014 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.Thermal performancesPlate-finPin-finHeat sinkNatural convectionNusselt numberPlate-fin arrayPlate-fin heat sinksHeat transfer coefficientPin-fin heat sinksPresentation