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Kolaps kavitacijskega mehurcka ob bakteriji na mikrometrskem merilu [Elektronski vir] = Cavitation bubble collapse in vicinity of a bacterium on a microscaleZevnik, Jure, strojnik ; Dular, MatevžV prispevku naslavljamo numerično modeliranje interakcije kavitacijskega mikro-mehurčka s prosto plavajočo bakterijsko celico. Uporabljamo pristop s sklopljenim modelom, ki upošteva vplive ... viskoznosti, površinske napetosti in nelinearne stisljivosti tekočine, ter je zmožen zajeti deformacije bakterijske ovojnice in njihovega vpliva na samo dinamiko mehurčka. Simulacije so bile izvedene za različne vrednosti brezdimenzijske razdalje med mehurčkom in bakterijo [gama]. Za vse obravnavane primere lahko opazimo skoraj popolnoma sferično obnašanje mehurčkov, kar v večji meri pripisujemo vplivom površinske napetosti. Rezultati kažejo na izrazito nelinearen trend padanja vrsnih mehanskih obremenitev na bakterijsko ovojnico z razdaljo [gama], kar gre pripisati nelinearnemu slabenju tlačnovalovne fronte tekom njenega širjenja v prostoru. Kljub temu za dovolj majhne razdalje [gama] lahko opazimo velik škodni potencial z vršnimi vrednostmi ekvivalentnih napetosti v celicni ovojnici do 8.1 MPa in pripadajočimi raztezki do 0.27. Posledično ugotavljamo, da je potencialno unicujoče območje razdalje med mikromehurčkom in bakterijo dokaj majhno, kar bi bilo lahko ključnega pomena pri optimizaciji učinkovitosti hidrodinamske kavitacije za uničevanje bakterij.Source: Kuhljevi dnevi 2020 [Elektronski vir] : zbornik del : spletna izvedba, 24.-25. september 2020 (Str. 209-218)Type of material - conference contributionPublish date - 2020Language - slovenianCOBISS.SI-ID - 30291715
Author
Zevnik, Jure, strojnik |
Dular, Matevž
Topics
kavitacija |
dinamika mehurčkov |
uničevanje bakterij |
cavitation |
bubble dynamics |
bacteria eradication
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Zevnik, Jure, strojnik | 52620 |
Dular, Matevž | 23471 |
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