What are the factors that influence the critical heat flux in microchannels during convective boiling?
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The critical heat flux (CHF) in microchannels during convective boiling is influenced by several factors. One factor is the heat transfer coefficient, which decreases with an increase in heat flux or vapor quality . Another factor is the nucleation site density, which affects the boiling heat transfer coefficient. Porous microchannels have a higher nucleation site density compared to copper-based microchannels, resulting in higher heat transfer coefficients at lower heat fluxes . Additionally, the local heat flux strongly depends on the local properties of the fluid and the local temperature in the adjacent heat spreader . The design parameters of the microchannel, such as thickness-to-particle-size ratio, also play a role in the CHF . Computational fluid dynamics (CFD) models can accurately predict the CHF in microchannels and can be used to optimize their performance .
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| The factors that influence the critical heat flux in microchannels during convective boiling are the heat flux, vapor quality, and flow blockage caused by the vapor flowing back to the heat sink's inlet plenum. | |
15 Jun 2020 11 Citations | The provided paper does not explicitly mention the factors that influence the critical heat flux in microchannels during convective boiling. |
23 Oct 2022 | The provided paper does not mention the factors that influence the critical heat flux in microchannels during convective boiling. |
| The provided paper does not mention the factors that influence the critical heat flux in microchannels during convective boiling. |
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