Video: Newtonian system yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A Newtonian Cov kua dej yog cov kua dej uas cov viscous stresses tshwm sim los ntawm nws cov ntws, ntawm txhua qhov chaw, yog linearly correlated rau lub zos strain rate-tus nqi hloov ntawm nws deformation lub sij hawm. Newtonian Cov kua dej yog cov qauv lej yooj yim tshaj plaws ntawm cov kua dej uas suav nrog viscosity.
Ntawm no, dab tsi yog Newtonian thiab tsis yog Newtonian kua dej?
A tsis yog - Newtonian cov kua dej yog cov kua dej uas tsis ua raws Newton tus txoj cai ntawm viscosity, piv txwv li, tas li viscosity tsis muaj kev ntxhov siab. Hauv tsis yog - Newtonian kua dej , viscosity tuaj yeem hloov pauv thaum nyob rau hauv quab yuam mus rau cov kua ntau dua lossis ntau dua. Yog li ntawd, qhov tsis tu ncua coefficient ntawm viscosity tsis tuaj yeem txhais tau.
Tsis tas li ntawd, cov kua Newtonian muab piv txwv li cas? Ib nqe lus tseem ceeb yog "Lub viscosity tsuas yog ua haujlwm ntawm cov kua dej, tshwj xeeb tshaj yog nws qhov kub thiab txias." Dej , roj , roj av , cawv thiab txawm tias glycerin yog cov piv txwv ntawm Newtonian kua. Piv txwv ntawm cov kua uas tsis yog-Newtonian yog slurries, suspensions, gels thiab colloids.
Kuj tseem paub, yog huab cua yog Newtonian kua?
Cov kua dej xws li dej, huab cua , ethanol, thiab benzene yog Newtonian . Qhov no txhais tau hais tias ib zajlus ntawm kev ntxhov siab rau cov shear tus nqi ntawm qhov kub thiab txias yog ib txoj kab ncaj nraim nrog txoj kab nqes mus tas li uas tsis muaj kev ywj pheej ntawm tus nqi shear. Peb hu qhov nqes hav qhov viscosity ntawm tus kua dej . Tag nrho cov pa roj Newtonian.
Puas yog zib ntab Newtonian lossis tsis yog Newtonian?
Honey yog ib qho piv txwv ntawm a tsis yog - Newtonian kua - ib tug kua uas hloov nws tus cwj pwm thaum muaj kev ntxhov siab los yog strain. Ixaj Newton thawj zaug piav qhia txog cov khoom ntawm qhov nws suav tias yog "cov kua zoo tagnrho," uas cov dej yog qhov piv txwv zoo tshaj.
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Dab tsi yog Newtonian thiab tsis yog Newtonian?
Cov kua dej uas tsis yog-Newtonian yog cov kua dej uas tsis ua raws li Newton txoj cai ntawm viscosity, piv txwv li, tas li viscosity tsis muaj kev ntxhov siab. Hauv cov kua dej uas tsis yog-Newtonian, viscosity tuaj yeem hloov pauv thaum nyob rau hauv quab yuam rau cov kua ntau dua lossis ntau dua. Ketchup, piv txwv li, ua runnier thaum shaken thiab yog li cov kua uas tsis yog-Newtonian
Cov dej puas yog Newtonian?
Qee qhov piv txwv ntawm Newtonian kua muaj xws li dej, organic solvents, thiab zib mu. Rau cov kua viscosity tsuas yog nyob ntawm qhov kub thiab txias. Cov no yog cov tsis yog-Newtonian nruj me ntsis, tab sis thaum lub ntws pib lawv coj qhov tseem ceeb raws li Newtonian kua (piv txwv li shear stress is linear with shear rate)