Video: Cov dej puas yog Newtonian?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qee qhov piv txwv ntawm Newtonian cov kua dej suav nrog dej , organic solvents, thiab zib mu. Rau cov kua viscosity tsuas yog nyob ntawm qhov kub thiab txias. Cov no yog nruj me ntsis tsis- Newtonian , tab sis thaum ntws pib lawv coj yam tseem ceeb li Newtonian kua (piv txwv li shear stress is linear with shear rate).
Yog li ntawd, dej puas yog Newtonian kua?
Ib qho classic Newtonian kua yog dej . Dej muaj viscosity zoo heev thiab yuav ib txwm ntws kwv yees tsis hais lub zog ua rau nws. Newtonian kua dej kuj tseem muaj cov viscosity hloov pauv tau hauv cov lus teb rau qhov kub thiab txias hloov pauv.
Ib yam li ntawd, cov ntshav puas yog Newtonian kua? Ntshav , ntawm qhov tod tes nrog rab riam hauv nws, yog ib qho tsis yog Newtonian kua dej . Nws cov viscosity hloov pauv nyob ntawm seb muaj kev ntxhov siab npaum li cas rau nws. Nws yog lub npe hu ua "shear-thinning" ua kua - qhov ntau ntshav yog agitated qhov tsawg viscous nws ua. Tab sis ntshav tsuas yog ib hom kua dej uas ntws tsis zoo li qhov koj xav tau.
Ib sab saum toj no, cov kua dej dab tsi hu ua Newtonian?
Piv txwv. Dej, cua, cawv, glycerol, thiab nyias lub cev muaj zog roj yog tag nrho cov piv txwv ntawm Newtonian kua dej tshaj qhov ntau ntawm shear stresses thiab shear rates ntsib nyob rau hauv lub neej txhua hnub.
Puas yog zib mu yog Newtonian kua?
Honey yog ib qho piv txwv ntawm qhov tsis yog Newtonian kua dej -a kua dej uas hloov nws tus cwj pwm thaum muaj kev ntxhov siab lossis ntxhov siab. Ixaj Newton thawj delineated cov khoom ntawm qhov nws suav tias yog zoo tagnrho ua kua ,” ntawm qhov twg dej yog qhov piv txwv zoo tshaj.
Pom zoo:
Cov dej ua haujlwm ntawm cov dej ntshiab yog dab tsi?
Kev ua dej num yog ua raws li qhov ntsuas ntawm 0 txog 1.0, nrog rau cov dej ntshiab muaj tus nqi ntawm 1.00. Nws txhais tau tias yog lub vapor siab ntawm cov dej tshaj ib qho piv txwv muab faib los ntawm lub vapor siab ntawm cov dej ntshiab ntawm qhov kub thiab txias. Nyob rau hauv lwm yam lus, qhov ntau unbound dej peb muaj, qhov muaj feem ntau peb muaj microbial spoilage
Cov dej hauv av puas tuaj yeem ua rau cov dab dej?
Ntau txhiab qhov tshwm sim hauv lub dab dej tuaj yeem pom thoob plaws hauv lub xeev Florida suav nrog ntau yam uas txuas hauv av mus rau cov dej ntws, dej ntws thiab pas dej. -Sinkholes tsim nyob rau hauv karst struts los ntawm lub cev qhuav dej ntawm nto sediments rau hauv av voids
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 khoom dab tsi ntawm cov dej tso cai rau cov dej los lo rau lub penny?
Kev sib koom tes
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom