Detail publikačního výsledku

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

BOHÁČEK, J.

Originální název

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

Anglický název

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

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

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

Klíčová slova v angličtině

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

Autoři

BOHÁČEK, J.

Rok RIV

2010

Vydáno

04.11.2009

Nakladatel

Ústav geoniky AVČR,v.v.i.

Místo

Ostrava

ISBN

978-80-86407-81-4

Kniha

Vodní paprsek

Strany od

19

Strany do

28

Strany počet

9

BibTex

@inproceedings{BUT32091,
  author="Jan {Boháček}",
  title="Modelling of a Free-Falling Water Droplet, Handicap of CSF Approach and Its Improvement Design",
  booktitle="Vodní paprsek",
  year="2009",
  pages="19--28",
  publisher="Ústav geoniky AVČR,v.v.i.",
  address="Ostrava",
  isbn="978-80-86407-81-4"
}