Thermal-hydraulic performance of a tapered microchannel
Tapered microchannel is a channel configuration design (CCD) which has gained attention owing to the superior performance in promoting uniform temperature distribution in a microchannel. In this study, the thermal-hydraulic performance of four different tapered channels is evaluated against a straig...
| Huvudupphovsmän: | , , |
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| Materialtyp: | Journal Article |
| Språk: | English |
| Publicerad: |
2020
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| Länkar: | https://hdl.handle.net/10356/141457 |
| _version_ | 1826111086512832512 |
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| author | Cheng, Kai Xian Chong, Yi Sheng Ooi, Kim Tiow |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Cheng, Kai Xian Chong, Yi Sheng Ooi, Kim Tiow |
| author_sort | Cheng, Kai Xian |
| collection | NTU |
| description | Tapered microchannel is a channel configuration design (CCD) which has gained attention owing to the superior performance in promoting uniform temperature distribution in a microchannel. In this study, the thermal-hydraulic performance of four different tapered channels is evaluated against a straight microchannel. The average hydraulic diameter, conductive heat transfer in the substrate material and convective heat transfer area are kept constant for the microchannels. The experiment is conducted for steady-state convective heat transfer using distilled water as the working fluid for Reynolds number range of 1300–3400 and a constant heat flux of 53.0 W/cm2. Results show that highly-tapered microchannels promote early turbulence at lower Reynolds numbers with better heat transfer and much greater pressure drop. All the tapered microchannels possess a thermal-hydraulic performance index which is less than 1, implying that a tapered microchannel yields a lower heat transfer capability given the same pumping power as a straight microchannel. |
| first_indexed | 2024-10-01T02:45:10Z |
| format | Journal Article |
| id | ntu-10356/141457 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:45:10Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1414572020-06-08T09:04:32Z Thermal-hydraulic performance of a tapered microchannel Cheng, Kai Xian Chong, Yi Sheng Ooi, Kim Tiow School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Taper Microchannel Tapered microchannel is a channel configuration design (CCD) which has gained attention owing to the superior performance in promoting uniform temperature distribution in a microchannel. In this study, the thermal-hydraulic performance of four different tapered channels is evaluated against a straight microchannel. The average hydraulic diameter, conductive heat transfer in the substrate material and convective heat transfer area are kept constant for the microchannels. The experiment is conducted for steady-state convective heat transfer using distilled water as the working fluid for Reynolds number range of 1300–3400 and a constant heat flux of 53.0 W/cm2. Results show that highly-tapered microchannels promote early turbulence at lower Reynolds numbers with better heat transfer and much greater pressure drop. All the tapered microchannels possess a thermal-hydraulic performance index which is less than 1, implying that a tapered microchannel yields a lower heat transfer capability given the same pumping power as a straight microchannel. 2020-06-08T09:04:31Z 2020-06-08T09:04:31Z 2018 Journal Article Cheng, K. X., Chong, Y. S., & Ooi, K. T. (2018). Thermal-hydraulic performance of a tapered microchannel. International Communications in Heat and Mass Transfer, 94, 53-60. doi:10.1016/j.icheatmasstransfer.2018.03.008 0735-1933 https://hdl.handle.net/10356/141457 10.1016/j.icheatmasstransfer.2018.03.008 2-s2.0-85045112636 94 53 60 en International Communications in Heat and Mass Transfer © 2018 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Taper Microchannel Cheng, Kai Xian Chong, Yi Sheng Ooi, Kim Tiow Thermal-hydraulic performance of a tapered microchannel |
| title | Thermal-hydraulic performance of a tapered microchannel |
| title_full | Thermal-hydraulic performance of a tapered microchannel |
| title_fullStr | Thermal-hydraulic performance of a tapered microchannel |
| title_full_unstemmed | Thermal-hydraulic performance of a tapered microchannel |
| title_short | Thermal-hydraulic performance of a tapered microchannel |
| title_sort | thermal hydraulic performance of a tapered microchannel |
| topic | Engineering::Mechanical engineering Taper Microchannel |
| url | https://hdl.handle.net/10356/141457 |
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