On the effect of surface roughness on the vapor flow under Leidenfrost-levitated droplets

Prat, M; Schmitz, P; Poulikakos, D

doi:10.1115/1.2817293

Title: On the effect of surface roughness on the vapor flow under Leidenfrost-levitated droplets

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Abstract

In this paper a theoretical investigation is reported on the effect of surface roughness on the phenomenon of Leidenfrost-levitation of droplets above a hot surface. The problem is solved first approximately using a macroscopic approach in which the roughness is replaced by a semi-empirical slip conditions of the Beavers-Joseph type. Next, a microscopic model which determines the vapor flow in the close vicinity of the rough surface is solved numerically. Three basic periodic roughnesses are examined: triangular, rectangular, and semi-cylindrical. The effect of the relative size of the droplet and the roughness elements on the vapor flow is investigated in the course of the study.

Authors:

Prat, M; Schmitz, P ^[1]; Poulikakos, D ^[2]

Inst. de Mecanique des Fluides de Toulouse (France)
Univ. of Illinois, Chicago, IL (United States). Mechanical Engineering Dept.

Publication Date:: Fri Sep 01 00:00:00 EDT 1995

Sponsoring Org.:: USDOE

OSTI Identifier:: 118735

Resource Type:: Journal Article

Journal Name:: Journal of Fluids Engineering

Additional Journal Information:: Journal Volume: 117; Journal Issue: 3; Other Information: PBD: Sep 1995

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; DROPLETS; LEVITATION; BOILING; SURFACES; ROUGHNESS; GAS FLOW; POROSITY; POROUS MATERIALS; WATER VAPOR; VAPORS; LIQUID FUELS; MATHEMATICAL MODELS; EVAPORATION

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                    Prat, M, Schmitz, P, and Poulikakos, D. On the effect of surface roughness on the vapor flow under Leidenfrost-levitated droplets.  United States: N. p., 1995. 
        Web.  doi:10.1115/1.2817293.

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                    Prat, M, Schmitz, P, & Poulikakos, D. On the effect of surface roughness on the vapor flow under Leidenfrost-levitated droplets.  United States.  https://doi.org/10.1115/1.2817293

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                    Prat, M, Schmitz, P, and Poulikakos, D. 1995.  
        "On the effect of surface roughness on the vapor flow under Leidenfrost-levitated droplets".  United States.  https://doi.org/10.1115/1.2817293.

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@article{osti_118735,

  title        = {On the effect of surface roughness on the vapor flow under Leidenfrost-levitated droplets},

  author       = {Prat, M and Schmitz, P and Poulikakos, D},

  abstractNote = {In this paper a theoretical investigation is reported on the effect of surface roughness on the phenomenon of Leidenfrost-levitation of droplets above a hot surface. The problem is solved first approximately using a macroscopic approach in which the roughness is replaced by a semi-empirical slip conditions of the Beavers-Joseph type. Next, a microscopic model which determines the vapor flow in the close vicinity of the rough surface is solved numerically. Three basic periodic roughnesses are examined: triangular, rectangular, and semi-cylindrical. The effect of the relative size of the droplet and the roughness elements on the vapor flow is investigated in the course of the study.},

  doi          = {10.1115/1.2817293},

  url          = {https://www.osti.gov/biblio/118735},
  journal      = {Journal of Fluids Engineering},
number       = 3,

  volume       = 117,

  place        = {United States},

  year         = {Fri Sep 01 00:00:00 EDT 1995},

  month        = {Fri Sep 01 00:00:00 EDT 1995}

}

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