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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 1.199 5-летний Импакт фактор: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 51, 2020 Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018025639
pages 263-285

MIXED AND FORCED CONVECTION HEAT TRANSFER CHARACTERISTICS OF SIERPINSKI CARPET FRACTAL FINS

David M. Calamas
Department of Mechanical Engineering, Georgia Southern University, P.O. Box 8046, Statesboro, GA 30460
Tiesha Wolfe
Department of Mechanical Engineering, Georgia Southern University, P.O. Box 8046, Statesboro, GA 30460
Valentin Soloiu
Department of Mechanical Engineering, Georgia Southern University, P.O. Box 8046, Statesboro, GA 30460

Краткое описание

When specific fractal geometries are used in the design of fins or heat sinks, the surface area available for heat transfer can be increased while the system mass can be simultaneously decreased. In order to assess the thermal performance of fractal fins for application in the thermal management of electronic devices, an experimental investigation was performed. The experimental investigation assessed the efficiency, effectiveness, and effectiveness per unit mass of straight rectangular fins inspired by the first four iterations of the Sierpinski carpet fractal pattern in a mixed and forced convection environment. Fin performance was analyzed for power inputs of 10, 20, and 30 W while the fins were subject to uniform velocities of 1, 2, and 4 m/s. While the fin efficiency was found to decrease with fractal iteration, the fin effectiveness per unit mass increased with fractal iteration, regardless of power input and uniform velocity. When compared to a traditional solid rectangular fin, or the zeroth fractal iteration, a fin inspired by the fourth fractal iteration of the Sierpinski carpet fractal pattern was found to be on average 6.76% more effective, 13.66% less efficient, and 71.01% more effective per unit mass when subject to a uniform velocity of 1 m/s. However, for higher velocities, a fourth iteration was found to be less effective than the zeroth iteration, regardless of power input. Thus, Sierpinski carpet fractal fins should be used in natural and mixed convection environments where they have been found to be more effective than traditional solid rectangular fins. However, when compared with traditional perforated fins, fins inspired by the Sierpinski carpet fractal pattern have been found to offer an increase in perforated fin effectiveness.


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