Fabrication and Optimization of Al2O3 Microchannels Using DLP-Based 3D Printing

Hanguk bunmal jaeryo hakoeji, Journal Year: 2025, Volume and Issue: 32(1), P. 59 - 66

Published: Feb. 28, 2025

This study focused on optimizing the digital light processing (DLP) 3D printing process for high-precision ceramic components using alumina-based slurries. Key challenges, such as cracking during debinding and precision loss due to slurry sedimentation, were addressed by evaluating exposure time nano-to-micro alumina powder ratios. The optimal conditions—exposure of 15 seconds a 1:9 mixing ratio—minimized cracking, improved gas flow debinding, increased structural precision. Microchannels with diameters above 1.2 mm successfully fabricated, but channels below 0.8 faced challenges accumulation over-curing. These results establish reliable fabricating complex stability. findings have significant potential applications in high-value industries, including aerospace, energy, healthcare, providing foundation efficient accurate production advanced structures.

Language: Английский

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Numerical investigation of the hydrothermal performance in novel cooled panels with flow-guided pin fins and secondary channels for reusable launch vehicles

Energy, Journal Year: 2025, Volume and Issue: unknown, P. 135991 - 135991

Published: April 1, 2025

Language: Английский

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A Numerical Study of Aerodynamic Drag Reduction and Heat Transfer Enhancement Using an Inclined Partition for Electronic Component Cooling

Processes, Journal Year: 2025, Volume and Issue: 13(4), P. 1137 - 1137

Published: April 10, 2025

This study presents a numerical investigation of fluid flow around heated rectangular cylinder controlled by an inclined partition, aiming to suppress vortex shedding, reduce aerodynamic drag, and enhance thermal exchange. The double multiple relaxation time lattice Boltzmann method (DMRT-LBM) is employed investigate the influence Reynolds number variations partition positions on characteristics system. results reveal presence three distinct regimes depending number. Increasing intensifies thereby improving heat exchange efficiency. Moreover, higher leads greater reduction in drag coefficient, reaching 125.41% for Re=250. Additionally, improvements performance were quantified, with Nusselt enhancements 29.47% Re=100, 55.55% Re=150, 74.78% Re=200, 82.87% positioning g was also examined at revealing that increasing spacing generally rise reducing percentage reduction. However, optimal configuration identified g=2d, where maximum coefficient reached 130.97%. In contrast, impact 150, 200, significant transfer top bottom faces: up 99.47% face Re=200 g=3d. Nevertheless, all numbers placements, decrease observed front due shielding it from incoming flow. These findings underscore effectiveness enhancing both component. approach holds strong potential various industrial applications, particularly aeronautics, similar control surfaces are used minimize as well exchangers electronic cooling systems optimizing dissipation crucial energy

Language: Английский

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Mechanism of interfacial thermal resistance variation in diamond/Cu/CNT tri-layer during thermal cycles

International Journal of Thermal Sciences, Journal Year: 2024, Volume and Issue: 207, P. 109380 - 109380

Published: Aug. 31, 2024

Language: Английский

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