Header Shape Effect on the Inlet Velocity Distribution in Cross-Flow Double-Layered Microchannel Heat Sinks
Counter-flow double-layered microchannel heat sinks are very effective for thermal control of electronic components; however, they require rather complicated headers and flow maldistribution can also play a negative role. The cross-flow configuration allows a much simpler header design and the therm...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-12-01
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| Series: | Fluids |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5521/7/1/7 |
| _version_ | 1797494096451862528 |
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| author | Stefano Savino Carlo Nonino |
| author_facet | Stefano Savino Carlo Nonino |
| author_sort | Stefano Savino |
| collection | DOAJ |
| description | Counter-flow double-layered microchannel heat sinks are very effective for thermal control of electronic components; however, they require rather complicated headers and flow maldistribution can also play a negative role. The cross-flow configuration allows a much simpler header design and the thermal performance becomes similar to that provided by the counter-flow arrangement if the velocity distribution in the microchannels is not uniform. The aim of this work is to show the possibility of achieving a favorable flow distribution in the microchannels of a cross-flow double-layered heat sink with an adequate header design and the aid of additional elements such as full or partial height baffles made of solid or porous materials. Turbulent RANS numerical simulations of the flow field in headers are carried out with the commercial code ANSYS Fluent. The flow in the microchannel layers is modeled as that in a porous material, whose properties are derived from pressure drop data obtained using an in-house FEM code. It is demonstrated that, with an appropriate baffle selection, inlet headers of cross-flow microchannel heat sinks yield velocity distributions very close to those that would allow optimal hotspot management in electronic devices. |
| first_indexed | 2024-03-10T01:29:24Z |
| format | Article |
| id | doaj.art-1e2617f5a714411c9e3c76a16f9eb6cb |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T01:29:24Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-1e2617f5a714411c9e3c76a16f9eb6cb2023-11-23T13:43:35ZengMDPI AGFluids2311-55212021-12-0171710.3390/fluids7010007Header Shape Effect on the Inlet Velocity Distribution in Cross-Flow Double-Layered Microchannel Heat SinksStefano Savino0Carlo Nonino1Dipartimento Politecnico di Ingegneria e Architettura, Università degli Studi di Udine, 33100 Udine, ItalyDipartimento Politecnico di Ingegneria e Architettura, Università degli Studi di Udine, 33100 Udine, ItalyCounter-flow double-layered microchannel heat sinks are very effective for thermal control of electronic components; however, they require rather complicated headers and flow maldistribution can also play a negative role. The cross-flow configuration allows a much simpler header design and the thermal performance becomes similar to that provided by the counter-flow arrangement if the velocity distribution in the microchannels is not uniform. The aim of this work is to show the possibility of achieving a favorable flow distribution in the microchannels of a cross-flow double-layered heat sink with an adequate header design and the aid of additional elements such as full or partial height baffles made of solid or porous materials. Turbulent RANS numerical simulations of the flow field in headers are carried out with the commercial code ANSYS Fluent. The flow in the microchannel layers is modeled as that in a porous material, whose properties are derived from pressure drop data obtained using an in-house FEM code. It is demonstrated that, with an appropriate baffle selection, inlet headers of cross-flow microchannel heat sinks yield velocity distributions very close to those that would allow optimal hotspot management in electronic devices.https://www.mdpi.com/2311-5521/7/1/7microchannel heat sinksdouble-layercross-flowheader geometrymaldistribution |
| spellingShingle | Stefano Savino Carlo Nonino Header Shape Effect on the Inlet Velocity Distribution in Cross-Flow Double-Layered Microchannel Heat Sinks Fluids microchannel heat sinks double-layer cross-flow header geometry maldistribution |
| title | Header Shape Effect on the Inlet Velocity Distribution in Cross-Flow Double-Layered Microchannel Heat Sinks |
| title_full | Header Shape Effect on the Inlet Velocity Distribution in Cross-Flow Double-Layered Microchannel Heat Sinks |
| title_fullStr | Header Shape Effect on the Inlet Velocity Distribution in Cross-Flow Double-Layered Microchannel Heat Sinks |
| title_full_unstemmed | Header Shape Effect on the Inlet Velocity Distribution in Cross-Flow Double-Layered Microchannel Heat Sinks |
| title_short | Header Shape Effect on the Inlet Velocity Distribution in Cross-Flow Double-Layered Microchannel Heat Sinks |
| title_sort | header shape effect on the inlet velocity distribution in cross flow double layered microchannel heat sinks |
| topic | microchannel heat sinks double-layer cross-flow header geometry maldistribution |
| url | https://www.mdpi.com/2311-5521/7/1/7 |
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