Comparative studies on heat transfer and flow resistance of nanofluid in microchannels with different sidewall micro-fins

The increasing integration of chips necessitates improved heat dissipation solutions, which has promoted the development and combination of nanofluids and microchannels. However, balancing heat transfer enhancement and flow resistance remains challenging. Hence, firstly, five different sidewall micr...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2024-09, Vol.149 (22), p.13443-13456
Main Authors: Yu, Fan, Zeng, Xiaoxin, Qin, Boyu, He, Tianbiao, Mao, Ning
Format: Article
Language:English
Subjects:
Aluminum oxide
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Comparative studies
Fins
Flow resistance
Heat transfer
Inorganic Chemistry
Measurement Science and Instrumentation
Microchannels
Nanofluids
Physical Chemistry
Polymer Sciences
Pressure drop
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Summary:The increasing integration of chips necessitates improved heat dissipation solutions, which has promoted the development and combination of nanofluids and microchannels. However, balancing heat transfer enhancement and flow resistance remains challenging. Hence, firstly, five different sidewall micro-fins in microchannels were designed, and then, mixture model was used to simulate the Al 2 O 3 –water nanofluids, which was followed by establishing a CFD model to investigate the effects of different micro-fins on the flow and heat transfer properties in microchannels. Results show that microchannels with micro-fins were significantly superior to smooth ones, achieving higher Nusselt numbers (Nu). The isosceles triangular micro-fin exhibits the highest Nu and reduced pressure drops by up to 16.1% compared to the rectangular micro-fin. Field synergistic theory analysis revealed that microchannels with isosceles triangular and trapezoidal micro-fins achieved the greatest reduction in synergistic angles, indicating improved synergy between flow and heat transfer.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-024-13641-3