Thaum lub sijhawm muaj mob loj, qhov teeb meem ntawm cov qaub ncaug aerosolized cov kua ntshav ntawm chaw kho hniav lub chaw muaj mob

Cov tshuaj tiv thaiv kab mob ua kom tsis txhob muaj kev phom sij thaum mus ntsib kws kuaj hniav
Thaum lub sijhawm muaj mob loj, qhov teeb meem ntawm cov qaub ncaug aerosolized cov kua ntshav ntawm chaw kho hniav lub chaw muaj mob
Nyob rau hauv ib daim ntawv luam tawm lub lim tiam no hauv Physics of Fluids, los ntawm AIP Publishing, Alexander Yarin thiab nws cov npoj yaig tau tshawb pom tias cov rog ntawm cov khoom siv hluav taws xob lossis cov kws kho hniav laum tsis muaj qhov sib piv rau cov viscoelastic cov khoom ntawm qib zaub mov, xws li polyacrylic acid, uas lawv siv li admixture me me rau dej hauv qhov chaw kho hniav.

Lawv qhov kev tshwm sim tau ua rau xav tsis thoob. Tsis tsuas yog ua ib qho admixture me me ntawm cov polymers ua kom tshem tawm aerosolization tag nrho, tab sis nws tau ua li ntawd nrog kev yooj yim, nthuav qhia lub hauv paus polymer physics, xws li coil-stretch txoj kev hloov, uas tau txais kev pab lub hom phiaj zoo nkauj.

Lawv sim ob daim FDA-pom zoo polymers. Polyacrylic acid ua pov thawj ua tau zoo tshaj xanthan ntawm cov pos hniav, vim tias ntxiv rau nws qhov siab ntev elongational viscosity (siab ywj siab nyob rau hauv kev ncab), nws tau qhia tawm qhov tsis tshua muaj siab ntawm cov viscosity, uas ua rau tso nws yooj yim.

Yarin hais tias "Qhov xav tsis thoob yog qhov kev sim thawj zaug hauv kuv chav kuaj pom tau pom lub tswv yim," Yarin hais. "Nws yog qhov xav tsis thoob uas cov ntaub ntawv no muaj peev xwm ua kom yooj yim thiab tag nrho kev siv zog ntawm aerosolization los ntawm cov cuab yeej kho hniav, nrog cov kev muaj zog loj tuaj koom. Txawm li cas los xij, cov rog hnyav tau tsim los ntawm cov ntaub ntawv ntxiv polymer muaj zog dua. "

Lawv txoj kev tshawb fawb tau sau tseg qhov tawg ua kom tawg ntawm hnab ris dej muab rau cov hniav thiab cov pos hniav uas cov cuab yeej kho hniav aerosolizes. Cov tshuaj tsuag txau uas sib txuas nrog mus ntsib kws kho hniav yog qhov tshwm sim ntawm dej ntsib kev co nrawm nrawm ntawm lub cuab yeej lossis lub zog centrifugal ntawm lub laum, uas tawg dej mus rau hauv cov dej me me thiab ua rau cov no.

Lub polymer admixture, thaum siv los pleev xim, suppresses tawg; hloov, polymer macromolecules uas ncab xws li cov hlua roj hmab txwv cov dej aerosolization. Thaum lub hau ntawm lub cuab tam vibrating los yog kev xyaum tho hniav plunges mus rau hauv cov tshuaj polymer, cov xov daws teeb meem rau hauv snakelike strands, uas tau rub rov qab mus rau qhov kawg ntawm lub cuab yeej, hloov cov kev ua haujlwm ib txwm pom nrog dej ntshiab hauv kev kho hniav.

“Thaum cov tee dej ua kom tawm mus tawm ntawm lub cev ua kua, cov pob tw mob tawm mus ntxiv. Qhov ntawd yog qhov uas tseem ceeb ua rau muaj kev sib hloov ntawm cov coil-stretch txoj kev hloov ntawm polymer macromolecules tuaj yeem ua si, "Yarin hais. "Lawv txwv Tsov tus tw elongation thiab rub lub droplet rov qab, kiag li tiv thaiv aerosolization."

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Dab Neeg Tau Los:

Cov ntaub ntawv muab los ntawm American lub koom haum ntawm Physics. Nco tseg: Cov ntsiab lus yuav muab kho rau qhov style thiab ntev