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Characterizing the Evaporating Dropl...

Li, Xi,

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Characterizing the Evaporating Droplets Over Heterogeneous Wettability Surfaces /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Characterizing the Evaporating Droplets Over Heterogeneous Wettability Surfaces // Xi Li.
作者:	Li, Xi,
面頁冊數:	1 electronic resource (86 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
Contained By:	Dissertations Abstracts International85-06B.
標題:	Mechanical engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30818228
ISBN:	9798381186147

Characterizing the Evaporating Droplets Over Heterogeneous Wettability Surfaces /
Li, Xi,

Characterizing the Evaporating Droplets Over Heterogeneous Wettability Surfaces /Xi Li. - 1 electronic resource (86 pages)

Source: Dissertations Abstracts International, Volume: 85-06, Section: B.

This work investigates deposition patterns left by evaporating particle-laden droplets on heterogeneous surfaces with spatially varying wettability. Spatial differences in receding contact angles give rise to scalloped-shaped contact lines. During evaporation, the contact line recedes in one location and remains pinned in another. This non-uniform contact line recession results in particle self-assembly above areas where the contact line remains pinned, but not where it recedes. This behavior is fairly robust across a variety of particle sizes, concentrations, and device geometries. We hypothesize that particle self-assembly in these cases is due to the competition between particle diffusion and the evaporative-driven advective flow. Diffusion appears to be more pronounced in regions where the contact line recedes while advection appears to be more pronounced near the pinned portion of the contact line. As such, particles appear to diffuse away from receding areas and toward pinned areas where advection transports them to the contact line. The distribution of particle deposition above the pinned regions is influenced by the particle size and concentration of particles in the droplet. Similar to homogeneous surfaces, deposition is more prevalent at the pinned portion of the contact line for smaller particles and lower concentrations, and more uniformly distributed across the entire pinned region for larger particles and higher concentrations. A better understanding of this process may be beneficial in a wide variety of particle separation applications like printing, cell patterning, biosensing, and anti-icing.

English

ISBN: 9798381186147Subjects--Topical Terms:

649730
Mechanical engineering.
Subjects--Index Terms:

Evaporating droplets

Characterizing the Evaporating Droplets Over Heterogeneous Wettability Surfaces /
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502 $b Ph.D. $c Rochester Institute of Technology $d 2023.
520 $a This work investigates deposition patterns left by evaporating particle-laden droplets on heterogeneous surfaces with spatially varying wettability. Spatial differences in receding contact angles give rise to scalloped-shaped contact lines. During evaporation, the contact line recedes in one location and remains pinned in another. This non-uniform contact line recession results in particle self-assembly above areas where the contact line remains pinned, but not where it recedes. This behavior is fairly robust across a variety of particle sizes, concentrations, and device geometries. We hypothesize that particle self-assembly in these cases is due to the competition between particle diffusion and the evaporative-driven advective flow. Diffusion appears to be more pronounced in regions where the contact line recedes while advection appears to be more pronounced near the pinned portion of the contact line. As such, particles appear to diffuse away from receding areas and toward pinned areas where advection transports them to the contact line. The distribution of particle deposition above the pinned regions is influenced by the particle size and concentration of particles in the droplet. Similar to homogeneous surfaces, deposition is more prevalent at the pinned portion of the contact line for smaller particles and lower concentrations, and more uniformly distributed across the entire pinned region for larger particles and higher concentrations. A better understanding of this process may be beneficial in a wide variety of particle separation applications like printing, cell patterning, biosensing, and anti-icing.
546 $a English
590 $a School code: 0465
650 4 $a Mechanical engineering. $3 649730
650 4 $a Engineering. $3 586835
650 4 $a Particle physics. $3 3433269
653 $a Evaporating droplets
653 $a Heterogeneous wettability
653 $a Particles
653 $a Self-assembly
690 $a 0548
690 $a 0537
690 $a 0798
710 2 $a Rochester Institute of Technology. $b Engineering. $e degree granting institution. $3 3815971
720 1 $a Schertzer, Michael $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 85-06B.
790 $a 0465
791 $a Ph.D.
792 $a 2023
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30818228