Detail publikace
Modelování volně padající vodní kapky, nedostatky CSF přístupu ajehonávrh na zlepšení
BOHÁČEK, J.
Český název
Modelování volně padající vodní kapky, nedostatky CSF přístupu ajehonávrh na zlepšení
Anglický název
Modelling of a Free-Falling Water Droplet, Handicap of CSF Approach and Its Improvement Design
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
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.
Český abstrakt
U každého vodního paprsku dochází přírozeně k sekundárnímu rozpadu z původní kontinuální substance na kapky. Obecně vysoké rychlosti vedou k větším deformacím kapek, kdy lze těžko nalézt kulatou kapku. V této studii bylo uvažováno pouze o malých kapkách.
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 česky
volně padající kapka, konečná rychlost, povrchové napětí
Klíčová slova anglicky
free-falling droplet, terminal velocity, volume of fluid, surface tension
Rok RIV
2009
Vydáno
04.11.2009
Nakladatel
Ústav geoniky AVČR,v.v.i.
Místo
Ostrava
ISBN
978-80-86407-81-4
Kniha
Vodní paprsek
Strany od–do
19–28
Počet stran
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",
month="November",
pages="19--28",
publisher="Ústav geoniky AVČR,v.v.i.",
address="Ostrava",
isbn="978-80-86407-81-4"
}