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Magnetically Enhanced Marangoni Convection for Efficient Mass and Heat Transfer like a Self-Driving Liquid Conveyor Belt

机译:Magnetically Enhanced Marangoni Convection for Efficient Mass and Heat Transfer like a Self-Driving Liquid Conveyor Belt

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摘要

Temperature gradient-induced Marangoni convection has attracted much attentionfor basic research and applications since it provides an effective meansfor mass and heat transfer through a liquid surface flow. Here the authorsfirst propose a general principle to enhance such surface flow by hinderingits transition to recirculation flow using an external field. They subsequentlyidentify ferrofluid and use it validate the principle since its reduced magneticsusceptibility at higher temperatures will make the heated surface liquid stayon the surface by a thermomagnetic body force. Using a laser beam to createa heated local surface and a magnet beneath the ferrofluid to provide a verticalfield, a high speed and long-range Marangoni flow is confirmed experimentallyand further supported by computational fluid dynamics simulations. To demonstratepossible applications, the authors show a self-driving pipeless liquidconveyor belt that can efficiently transfer heat from a source to sink withoutexternal power. The demonstration of enhanced Marangoni convection opensnew avenue to explore interfacial fluid dynamics and its wide applications.

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  • 来源
    《Advanced functional materials》 |2022年第30期|2202984.1-2202984.6|共6页
  • 作者单位

    Department of Mechanical EngineeringUniversity of HoustonHouston, TX 77204, USA;

    Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu, Sichuan 610054, China,Yangtze Delta Region Institute (Huzhou)University of Electronic Science and Technology of ChinaHuzhou 313001, China;

    School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu, Sichuan 610054, ChinaInstitute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu, Sichuan 610054, ChinaDepartment of Electrical and Computer EngineeringUniversity of HoustonHouston, TX 77204, USA,Materials Science and EngineeringUniversity of HoustonHouston, TX 77204, USA,Department of Physics and Texas Center for SuperconductivityUniversity of HoustonHousInstitute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu, Sichuan 610054, China,Yangtze Delta Region Institute (Huzhou)University of Electronic Science and Technology of ChinaHuzhou 313001, China;

    DepartDepartment of Electrical and Computer EngineeringUniversity of HoustonHouston, TX 77204, USA;

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  • 原文格式 PDF
  • 正文语种 英语
  • 中图分类
  • 关键词

    enhanced Marangoni convection; ferrofluid; magnetic field; thermocapillary convection; thermomagnetic force;

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