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논문 기본 정보

저자정보
(울산과학기술원) (울산과학기술원)
저널정보
한국유체기계학회 한국유체기계학회 논문집 한국유체기계학회 논문집 제28권 제5호(통권 제152호)
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    초록·키워드

    This study investigates hydrophobic surface modifications on condensation heat transfer in a visualization-type thermosyphon. Three surfaces—PDMS-based SiO₂ nanoparticle coating (nPDMS), wet-etched, and amorphous fluoropolymer (AF)—were applied to the condenser section and evaluated for thermal resistance, heat transfer coefficients, and condensation behavior. While performance was similar at low heat flux, significant differences appeared at higher flux: at 4 W/cm², the AF coating reduced thermal resistance by∼20% and doubled condensation heat transfer coefficients compared to the bare surface by promoting rapid droplet departure (∼2 mm), whereas the nPDMS surface showed poor performance due to delamination and large hysteresis, and the etched surface shifted from dropwise to filmwise condensation. Overall, AF coatings demonstrated superior durability and thermal performance, highlighting their potential for practical thermosyphon applications.

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      UCI(KEPA) : I410-151-26-02-094528779