Publication detail

Modelling of a Free-Falling Water Droplet, Handicap of CSF Approach and Its Improvement Design

BOHÁČEK, J.

Original Title

Modelling of a Free-Falling Water Droplet, Handicap of CSF Approach and Its Improvement Design

English Title

Modelling of a Free-Falling Water Droplet, Handicap of CSF Approach and Its Improvement Design

Type

conference paper

Language

en

Original Abstract

By nature, every water jet undergoes a secondary breakup from previously continuous substance to droplets. Generally, higher velocities lead into more distorted droplets, and a perfectly spherical droplet can be barely found then. However, in this study, slowly moving droplets of the circular shape were considered. The free-falling droplets (2 mm and 0.2 mm) were numerically solved to shed light on the flow field, their terminal velocity was calculated, and then some drawbacks in modelling of surface tension effects were shown. The commercial CFD package Fluent, specifically the Volume of Fluid Method with the continuous surface force model, was used. After all, several approaches were proposed to improve interface curvature estimation, and consequently to model surface tension effects more precisely.

English abstract

By nature, every water jet undergoes a secondary breakup from previously continuous substance to droplets. Generally, higher velocities lead into more distorted droplets, and a perfectly spherical droplet can be barely found then. However, in this study, slowly moving droplets of the circular shape were considered. The free-falling droplets (2 mm and 0.2 mm) were numerically solved to shed light on the flow field, their terminal velocity was calculated, and then some drawbacks in modelling of surface tension effects were shown. The commercial CFD package Fluent, specifically the Volume of Fluid Method with the continuous surface force model, was used. After all, several approaches were proposed to improve interface curvature estimation, and consequently to model surface tension effects more precisely.

Keywords

free-falling droplet, terminal velocity, volume of fluid, surface tension

RIV year

2009

Released

04.11.2009

Publisher

Ústav geoniky AVČR,v.v.i.

Location

Ostrava

ISBN

978-80-86407-81-4

Book

Vodní paprsek

Pages from

19

Pages to

28

Pages count

9

BibTex


@inproceedings{BUT32091,
  author="Jan {Boháček}",
  title="Modelling of a Free-Falling Water Droplet, Handicap of CSF Approach and Its Improvement Design",
  annote="By nature, every water jet undergoes a secondary breakup from previously continuous substance to droplets. Generally, higher velocities lead into more distorted droplets, and a perfectly spherical droplet can be barely found then. However, in this study, slowly moving droplets of the circular shape were considered. The free-falling droplets (2 mm and 0.2 mm) were numerically solved to shed light on the flow field, their terminal velocity was calculated, and then some drawbacks in modelling of surface tension effects were shown. The commercial CFD package Fluent, specifically the Volume of Fluid Method with the continuous surface force model, was used. After all, several approaches were proposed to improve interface curvature estimation, and consequently to model surface tension effects more precisely.",
  address="Ústav geoniky AVČR,v.v.i.",
  booktitle="Vodní paprsek",
  chapter="32091",
  howpublished="electronic, physical medium",
  institution="Ústav geoniky AVČR,v.v.i.",
  year="2009",
  month="november",
  pages="19--28",
  publisher="Ústav geoniky AVČR,v.v.i.",
  type="conference paper"
}