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  • Multi-scale boiling heat transfer investigation on micro-thin aluminum heaters [Elektronski vir]
    Bucci, Mattia ; Zupančič, Matevž, 1990- ; Golobič, Iztok
    Nucleate boiling is a highly efficient heat transfer mode distinguished by the liquidvapor phase change, which occurs through the formation, growth, and detachment of vapor bubbles from a heated ... surface. Its crucial role in various industrial applications, such as nuclear power plant operation and effective heat management in small electronic devices, has driven significant research efforts. However, despite extensive research dedicated to boiling investigations, there are still substantial knowledge gaps that hinder our ability to accurately predict heat removal rates. These knowledge gaps arise from the complex nature of small-scale boiling phenomena, which are further complicated by their strong dependence on operating conditions and the interactions between walls and fluids. In an effort to address some of these gaps, we conducted multi-scale investigations during pool boiling of de-ionized water on microthin aluminum heaters. We captured bubble dynamics through multiple synchronized diagnostic sources, including high-speed backlit imaging to track bubble growth, synchronized high-speed infrared thermometry to capture the corresponding thermal footprint on the boiling surface, and in-house developed fast-response micro-thermocouples to measure temperature at multiple locations within the fluid. Our study reveals peculiar aspects of heat transfer mechanisms occurring at single bubble level (low heat fluxes) and in fully developed nucleate boiling regimes (high heat fluxes).
    Vir: Eurotherm 2024 [Elektronski vir] : 9th European Thermal Sciences Conference, 10/06/2024 - 13/06/2024, Lake Bled, Slovenia (Vol. 2766, [article no.] 012128, 2024, str. 1-6)
    Vrsta gradiva - prispevek na konferenci ; neleposlovje za odrasle
    Leto - 2024
    Jezik - angleški
    COBISS.SI-ID - 199313155

    Povezava(-e):

    https://iopscience.iop.org/article/10.1088/1742-6596/2766/1/012128
    Repozitorij Univerze v Ljubljani – RUL
    DOI

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