A microchannel flow with presence of micro-post arrays on channel top wall

Al‐Sharafi, Abdullah; Yilbaş, Bekir Sami; Al‐Qahtani, Hussain; Şahin, Ahmet Z.

doi:10.1016/j.ijthermalsci.2021.106883

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…Moreover, dimensional accuracy becomes critical in microbiologic research such as microcontact printing for patterning proteins on substrates 8 . The shape and size of micro-post arrays play an important role in the micro-channel flow towards reducing the pressure drop via lowering frictional drag 9 , 10 . In addition, micro-post arrays can be impregnated by a fluid while producing lubricant surfaces, which become critically important for medical applications such as artificial hip joints 11 .…”

Section: Introductionmentioning

confidence: 99%

Water droplet can mitigate dust from hydrophobized micro-post array surfaces

Abubakar

Yilbaş

Al‐Qahtani

et al. 2021

Sci Rep

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Water droplet rolling motion over the hydrophobized and optically transparent micro-post array surfaces is examined towards dust removal pertinent to self-cleaning applications. Micro-post arrays are replicated over the optically transparent polydimethylsiloxane (PDMS) surfaces. The influence of micro-post array spacing on droplet rolling dynamics is explored for clean and dusty surfaces. The droplet motions over clean and dusty micro-post array surfaces are monitored and quantified. Flow inside the rolling droplet is simulated adopting the experimental conditions. Findings reveal that micro-post gap spacing significantly influences droplet velocity on clean and dusty hydrophobized surfaces. Air trapped within the micro-post gaps acts like a cushion reducing the three-phase contact line and interfacial contact area of the rolling droplet. This gives rise to increased droplet velocity over the micro-post array surface. Droplet kinetic energy dissipation remains large for plain and micro-post arrays with small gap spacings. A Rolling droplet can pick up dust particles from micro-post array gaps; however, few dust residues are observed for large gap spacings. Nevertheless, dust residues are small in quantity over hydrophobized micro-post array surfaces.

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Section: Introductionmentioning

confidence: 99%