Emergence and breakup of a cluster of ordered microparticles during the interaction of thermocapillary and thermogravitational convection

Abstract

Local laser heating of the liquid film leads to simultaneous self-organization of both cellular convective structures and a cluster of micron-scale particles. The cluster is formed on the free surface of the layer and consists of hexagonal structures with a size of 50-100 μm. The height of the liquid film (0.5 mm) is ten times the diameter of the convective cells. Experimental data on the distribution of particle sizes and sizes of hexagonal cells in the cluster are presented. The cluster shape may be either a circle with a diameter of 110-140 μm, or an ellipse. Due to the instability of the velocity field, the toroid is not formed, and convective cells are formed only near the heating center. Self-organization of a cluster of particles and cellular structures using local heating can be effectively used to create new promising materials, as well as in micro-biology and medicine.

Original language	English
Pages (from-to)	165-173
Number of pages	9
Journal	Powder Technology
Volume	379
DOIs	https://doi.org/10.1016/j.powtec.2020.10.048
Publication status	Published - Feb 2021

Keywords

Benard-Marangoni convection
Laser heating
Liquid interface
Micro-particles
Self-assembly

ASJC Scopus subject areas

Chemical Engineering(all)

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10.1016/j.powtec.2020.10.048

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@article{a0de796737cb4e9dbdb48f282eafb4d9,

title = "Emergence and breakup of a cluster of ordered microparticles during the interaction of thermocapillary and thermogravitational convection",

abstract = "Local laser heating of the liquid film leads to simultaneous self-organization of both cellular convective structures and a cluster of micron-scale particles. The cluster is formed on the free surface of the layer and consists of hexagonal structures with a size of 50-100 μm. The height of the liquid film (0.5 mm) is ten times the diameter of the convective cells. Experimental data on the distribution of particle sizes and sizes of hexagonal cells in the cluster are presented. The cluster shape may be either a circle with a diameter of 110-140 μm, or an ellipse. Due to the instability of the velocity field, the toroid is not formed, and convective cells are formed only near the heating center. Self-organization of a cluster of particles and cellular structures using local heating can be effectively used to create new promising materials, as well as in micro-biology and medicine.",

keywords = "Benard-Marangoni convection, Laser heating, Liquid interface, Micro-particles, Self-assembly",

author = "Misyura, {S. Y.} and Egorov, {R. I.} and Morozov, {V. S.} and Zaitsev, {A. S.}",

note = "Funding Information: The investigation with the laser technology was supported by the Tomsk Polytechnic University Competitiveness Enhancement Program. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2021",

month = feb,

doi = "10.1016/j.powtec.2020.10.048",

language = "English",

volume = "379",

pages = "165--173",

journal = "Powder Technology",

issn = "0032-5910",

publisher = "Elsevier",

}

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T1 - Emergence and breakup of a cluster of ordered microparticles during the interaction of thermocapillary and thermogravitational convection

AU - Misyura, S. Y.

AU - Egorov, R. I.

AU - Morozov, V. S.

AU - Zaitsev, A. S.

N1 - Funding Information: The investigation with the laser technology was supported by the Tomsk Polytechnic University Competitiveness Enhancement Program. Publisher Copyright: © 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2021/2

Y1 - 2021/2

N2 - Local laser heating of the liquid film leads to simultaneous self-organization of both cellular convective structures and a cluster of micron-scale particles. The cluster is formed on the free surface of the layer and consists of hexagonal structures with a size of 50-100 μm. The height of the liquid film (0.5 mm) is ten times the diameter of the convective cells. Experimental data on the distribution of particle sizes and sizes of hexagonal cells in the cluster are presented. The cluster shape may be either a circle with a diameter of 110-140 μm, or an ellipse. Due to the instability of the velocity field, the toroid is not formed, and convective cells are formed only near the heating center. Self-organization of a cluster of particles and cellular structures using local heating can be effectively used to create new promising materials, as well as in micro-biology and medicine.

AB - Local laser heating of the liquid film leads to simultaneous self-organization of both cellular convective structures and a cluster of micron-scale particles. The cluster is formed on the free surface of the layer and consists of hexagonal structures with a size of 50-100 μm. The height of the liquid film (0.5 mm) is ten times the diameter of the convective cells. Experimental data on the distribution of particle sizes and sizes of hexagonal cells in the cluster are presented. The cluster shape may be either a circle with a diameter of 110-140 μm, or an ellipse. Due to the instability of the velocity field, the toroid is not formed, and convective cells are formed only near the heating center. Self-organization of a cluster of particles and cellular structures using local heating can be effectively used to create new promising materials, as well as in micro-biology and medicine.

KW - Benard-Marangoni convection

KW - Laser heating

KW - Liquid interface

KW - Micro-particles

KW - Self-assembly

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DO - 10.1016/j.powtec.2020.10.048

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