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Transport Phenomena in Nano and Micro Scales، جلد ۶، شماره ۲، صفحات ۱۳۳-۱۵۱
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| چکیده فارسی مقاله |
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| عنوان انگلیسی |
Three dimensional numerical study on a trapezoidal microchannel heat sink with different inlet/outlet arrangements utilizing variable properties nanofluid |
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| چکیده انگلیسی مقاله |
Nowadays, microchannels as closed circuits channels for fluid flow and heat removal are an integral part of the silicon-based electronic microsystems. Most of previous numerical studies on microchannel heat sinks (MCHS) have been performed for a two-dimensional domain using constant properties of the working fluid. In this study, laminar fluid flow and heat transfer of variable properties Al2O3-water nanofluid in a trapezoidal MCHS, consisted of five trapezoidal microchannels have been studied. The three dimensional solution domains include the whole flow field and the complete MCHS solid parts. Four inlet/outlet arrangements, three pressure drops of 5, 10 and 15 kPa and nanoparticles volume fractions between 0 and 4% are assumed and the effects of these arrangements, properties variations and the Brownian motion on the heat sink performance quantified. The results indicate that the A-type heat sink, for which the inlet and outlet are placed horizontally at the center of the north and the south walls, has a better heat transfer performance, smaller thermal resistance and provides more uniform substrate temperature distribution. Temperature-dependent properties increases the heat transfer between 2.7% and 3.39%, decreases the thermal resistance between 3.49% and 6.29 % and decreases the ratio of difference between the maximum and minimum substrate temperatures to the heat flux between 3.3% and 7.19%. Presence of the Brownian motion showed a similar trend but with a slighter importance. |
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| نویسندگان مقاله |
Hossien Khorasanizadeh |
University of Kashan
Mojtaba Seperhnia |
Uni. of Kashan
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| نشانی اینترنتی |
http://tpnms.usb.ac.ir/article_4043_edf83b95f7ca85c16a294f27eb802a36.pdf |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/543/article-543-699604.pdf |
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| زبان مقاله منتشر شده |
en |
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