Numerical investigation of various twisted tapes enhancing a circular microchannel heat sink performance

نویسندگان

چکیده

• Microchannel heat sinks are modelled by conjugate transfer and laminar flow CFD. Four performance enhancement tape inserts tested individually combined. Tape axial twist improves the Nusselt number gains to hydraulic loss trade-off. With best heated base is 16 ℃ cooler at 100 W/cm 2 flux input. Sealing in barrel prevents tip leakage raises conduction. The continuous power increase miniaturization of modern electronics require increasingly effective thermal management systems. thermo-hydraulic water-cooled L×L square-base silicon microchannel investigated a computational fluid dynamics model over Reynolds range 500. Water constant inlet temperature 298 K runs through 33 parallel tubes, extracting from bottom wall that has Hydro-thermal performance-enhancing numerically featuring (i) radial gaps between tube, (ii) with pitch distances ∞, L/2, or L/4, (iii) zero, one, two 90-degree angular steps consecutive segments, (iv) alternating clockwise anti-clockwise twisted combinations these features. produce both loss. All twist, steps, direction reversal produced better trade-offs than baseline configuration no tape. four L/4 helical segments provided lowest average temperature, 16.13 below not tape, same This predicted drop significant achievement towards conditioning electronic components so they may be longer-lasting, use less energy, have reduced environmental impact.

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ژورنال

عنوان ژورنال: International Journal of Heat and Fluid Flow

سال: 2022

ISSN: ['1879-2278', '0142-727X']

DOI: https://doi.org/10.1016/j.ijheatfluidflow.2022.109065