Saisorn, Sira

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Saisorn, Sira
Alternative Name
Saisorn, S.
Main Affiliation
Email
sira.sa@kmitl.ac.th

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    Item type:Publication,
    Characterization of diabatic air-water flow in helically coiled micro-channel
    (2026-05-15)
    Benjawun, Phakkhanan
    ;
    Chingulpitak, Sakkarin
    ;
    Pratuyai, Kritsada
    ;
    Wongwises, Somchai
    ;
    Saisorn, Sira
    Experimental studies on flow patterns and heat transfer (HT) phenomena in a two-phase air-water system within a vertically helically coiled micro-scale tube were conducted using an SS-304 tube with a 1 mm diameter, a coil diameter of 50 mm, and a uniform coil pitch of 20 mm. The study investigated heat transfer characteristics under constant heat flux conditions. The superficial gas and liquid Reynolds numbers ranged from 290 to 3800 and 780 to 1170, respectively. The results indicated that throat-annular flow exhibited superior heat transfer performance compared to bubble flow, slug flow, churn flow, and annular flow. Finally, the observed flow regimes from the experiment were analyzed and compared with existing prediction methods.
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    Item type:Publication,
    Experimental investigation on flow pattern and void fraction for two-phase gas-liquid upflow in a vertical helically coiled micro-channel
    (2025-03-01)
    Saisorn, Sira
    ;
    Benjawun, Phakkhanan
    ;
    Suriyawong, Adirek
    ;
    Wongwises, Somchai
    To contribute toward state-of-the-art microfluidic technology, our experiments were conducted to study gas-liquid adiabatic upflow phenomena in a helical micro-channel having a channel diameter of 0.87 mm, a coil diameter of 50 mm, and a helical pitch of 20 mm. The presence of centrifugal acceleration in the micro-scale flow is given as follows. The unique flow pattern having the throat-like gas-core flow generally detected in the straight micro-tube was still present in the curved test section. The void fraction characteristics were not able to match with the homogeneous flow model. The slip ratio data explicitly showed that the annular flow tended to be highly affected by the secondary flow when compared to the throat-annular flow. The prediction based on different approaches indicated that the data aligned well with drift flux model incorporating inertia and channel orientation effects.