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Razvoj in eksperimentalna validacija tri-razsežnega numeričnega modela za napovedovanje značilnosti plinsko fokusiranih mikro-curkovKovačič, KrištofV magistrskem delu smo zasnovali tri-razsežni numerični model za napovedovanje dvo-faznih tokov, ki nastanejo pri plinsko fokusiranih mikro-curkih voda-zrak. Uporabljena je formulacija mešanice za ... popis nestisljivega, newtonskega toka vode in fokusirnega zraka, ki vključuje k-? SST turbulenčni model zaradi zagotavljanja numerične stabilnosti. Postopek numeričnega reševanja temelji na metodi kontrolnih volumnov z metodo volumna tekočine, ki vključuje geometrijsko rekonstrukcijo stične površine. Z ustrezno izbranimi robnimi in začetnimi pogoji takšen model omogoča natančno, ponovljivo, od računske mreže neodvisno in stabilno numerično simulacijo tlačnih in hitrostnih polj. Numerični model smo validirali z rezultati meritev na vertikalni, navzdol postavljeni konfiguraciji šobe. Razvili smo namenski računalniški program za analizo karakterističnih parametrov mikro-curkov iz eksperimentalno dobljenih videoposnetkov in numeričnih animacij. Reynolds-ovi števili za zrak in vodo v numeričnih simulacijah sta v območju 1009–2421 in 48–104, Weber-ovo število pa 0,57–3,0. Identične oblike mikro-curkov so pri enaki kombinaciji volumskih pretokov zraka in vode opazne tako pri eksperimentalnih videoposnetkih kot tudi pri numeričnih animacijah. Zasnovan model dobro napove povprečne in lokalne premere mikrocurka. Analizirali smo tudi časovni potek razpada curka, na katerega vplivajo nestabilnosti. Preverili smo, kako se kinetična energija prenaša s plina na kapljevino in opazili mesta z lokalno povišanimi vrednostmi kinetične energije zraka.Type of material - research project ; adult, seriousPublication and manufacture - Ljubljana : [K. Kovačič], 2022Language - slovenianCOBISS.SI-ID - 186606083
Author
Kovačič, Krištof
Other authors
Gregorc, Jurij, strojnik |
Šarler, Božidar
Topics
mikro-curek |
tokovno fokusiranje |
numerični modeli |
video analiza |
premer |
nestabilnosti |
validacija |
micro-jet |
flow focusing |
numerical model |
video analysis |
diameter |
instability
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Library | Call number – location, accession no. ... | Copy status |
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Faculty of Mechanical Engineering, Lj. | K pnf KOVAČIČ K. Razvoj IN: 00061577 |
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Kovačič, Krištof | 56848 |
Gregorc, Jurij, strojnik | 32071 |
Šarler, Božidar | 04101 |
Source: Personal bibliographies
and: SICRIS
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