Ultrasonic nyhuv

Ultrasonic yoj propagation hauv nruab nrab, vim yog ultrasonic yoj sis nrog kev tshaj tawm, lub cev thiab tshuaj hloov hauv nruab nrab, los tsim kom muaj cov khoom siv hluav taws xob, thermal, electromagnetics thiab tshuaj los ntawm ultrasound, nrog rau cov nram qab no plaub hom teebmeem:

Thiab hais tias yog cov neeg kho tshuab cov nyhuv. Cov neeg kho tshuab kev ua haujlwm ntawm ultrasonic yuav txhawb lub emulsification ntawm cov kua, cov liquefaction gel thiab cov dispersion ntawm solid. Thaum sawv tsis tau tsim nyob rau hauv ultrasonic kua nruab nrab, cov khoom me me raug muab tshem tawm hauv cov dej yog cov condensed ntawm cov pob qij txha txuas vim qhov kev txiav txim ntawm cov neeg kho tshuab rog, thiab kev nrhoo sij hawm tsim nyob hauv qhov chaw. Induced polarization thiab ntxeem tau magnetization (saib dielectric physics thiab magnetostriction) vim yog txhua yam kev ua haujlwm ntawm ultrasonic tsis nyob rau hauv cov ntaub ntawv piezoelectric thiab cov khoom magnetostrictive.

Parliamentary nqus tsev vacuum. Ultrasonic tsis muaj peev xwm tsim cov npuas me me thaum lawv ua dej haus. Ib qho yog vim tias qhov teeb meem hauv cheeb tsam nyob hauv cov kua ua rau pom tsis zoo. Qhov pib ntawm kev ua rau cov roj ua rau cov hluav taws xob pib hauv cov kua oversaturate thiab kev khiav tawm ntawm cov kua ua me me npuas. Lwm qhov laj thawj yog tias lub zog tensile nyuab siab "kua muag" cov kua ua kab noj hniav, hu ua cavitation. Cov pa roj vapor lossis lwm cov pa roj hauv cov kua, kab tias txawm tias lub tshuab nqus tsev. Cov me npuas tsim los ntawm cavitation yuav tsiv, loj hlob los yog tawg ntho nrog kev co ntawm qhov chaw nruab nrab. Thaum twg cov kua dej nyob ze rau hauv npuas, kub siab, kev kub siab thiab kev poob siab yuav ua tau. Kev sib txhuam nrog txuam nrog cavitation tuaj yeem tsim fais fab nqi thiab tsim luminescence hauv npuas vim raug tawm. Ultrasonic kho hauv cov kua feem ntau muaj feem xyuam rau cavitation.

Tus tub ntxhais kawm: qhov hloov mus rau qhov hloov sov. Vim hais tias ntawm high zaus thiab siab zog ntawm ultrasonic nthwv dej, nws muaj peev xwm tsim teeb meem loj thermal thaum absorbed by medium.

Tus menyuam kawm ntawv: cov tshuaj lom neeg ntawm theta. Qhov kev txiav txim ntawm ultrasound yuav ua rau kom ntxias lossis ua kom accelerate qee cov tshuaj lom neeg. Piv txwv, hydrogen peroxide yog tsim los ntawm ntshiab dej ntshiab tom qab ultrasonic kho. Nitrite yog ua nyob rau hauv dej nrog nitrogen yaj los ntawm ultrasonic kho. Cov kua qaub yuav hloov xim lossis ploj tom qab kho ultrasonic. Cov phenomena yeej ib txwm nrog lus cavitation. Ultrasound tuaj yeem siv lub tshuab hluav taws xob, kev siv tshuaj tua kab thiab tshuaj polymerization ntau yam tshuaj. Ultrasonic tsis tseem muaj teebmeem loj ntawm cov duab yees duab thiab cov hluav taws xob. Tom qab ultrasonic kho mob ntau yam amino acids thiab lwm yam organic tshuaj, tus cwj pwm nqus band zoo thiab tsom teeb hom absorption, qhia tias cavitation hloov molecular qauv.