Qhov sib txawv tseem ceeb ntawm Newtonian thiab cov dej tsis yog Newtonian yog cov kua Newtonian muaj qhov viscosity tas li, qhov tsis yog-Newtonian cov kua dej muaj qhov sib txawv.
Peb tuaj yeem faib cov kua dej, piv txwv li cov kua thiab cov pa, raws li Newtonian lossis tsis yog-Newtonian nyob ntawm qhov viscosity ntawm cov kua. Viscosity yog lub xeev ntawm ua tuab thiab nplaum vim muaj kev sib txhuam sab hauv ntawm cov kua. Tsis tas li ntawd, peb yuav tsum xav txog lwm yam kev ntsuas hauv kev txiav txim siab seb cov kua dej yog Newtonian lossis tsis yog Newtonian. Cov no yog shear stress thiab shear rate. Shear stress yog qhov kev ntxhov siab siv coplanar ntawm cov kua dej hla ntu thaum shear rate yog tus nqi ntawm kev hloov pauv ntawm qhov uas ib txheej ntawm cov kua hla dhau ib txheej uas nyob ib sab.
Newtonian Fluid yog dab tsi?
Newtonian kua yog cov kua dej uas muaj viscosity tas li thiab xoom shear tus nqi ntawm xoom shear stress. Qhov ntawd txhais tau tias; tus nqi shear yog ncaj qha proportional rau shear stress. Hauv lwm lo lus, qhov sib piv ntawm kev ntxhov siab rau lub shear tus nqi yog tas li thoob plaws hauv cov kua.
Daim duab 01: Cov yam ntxwv ntawm Newtonian Fluid
Txawm li cas los xij, cov kua dej feem ntau peb paub muaj qhov sib txawv viscosity. Feem ntau, tsis muaj cov kua dej tiag tiag haum lub ntsiab lus raws nraim. Yog li ntawd, nws raug suav hais tias yog ib qho qauv lej yooj yim. Tab sis peb tuaj yeem xav tias qee cov kua dej thiab cov pa roj xws li dej thiab cua li Newtonian kua. Lub npe Newtonian los ntawm Isaac Newton, uas yog thawj tus kws tshawb fawb siv qhov sib npaug sib txawv los qhia txog kev sib raug zoo ntawm kev ntxhov siab thiab kev sib tsoo ntawm cov kua.
Non Newtonian Fluid yog dab tsi?
Non-Newtonian kua yog cov kua dej uas muaj qhov sib txawv ntawm cov viscosity thiab kev sib txawv ntawm kev sib txawv nrog kev ntxhov siab. Nws yog vim tias cov kua dej no tsis ua raws li Newton txoj cai ntawm viscosity. Lub viscosity ntawm cov kua dej no tuaj yeem hloov pauv raws li kev quab yuam. piv txwv li, qee cov kua xws li ntses yog runnier thaum lub raj mis shaken. Cov kua dej feem ntau peb paub yog cov kua dej uas tsis yog Newtonian. Ntau cov tshuaj ntsev, cov polymers molten thiab ntau lwm cov kua tuaj yeem muab faib ua pawg no.
Daim duab 02: Ib qho Tsis-Newtonian Fluid
Txawm tias peb siv lo lus viscosity hauv cov tshuab ua kua los piav txog cov khoom ntawm cov kua dej, nws tsis tsim nyog los piav qhia txog cov khoom ntawm cov kua dej uas tsis yog-Newtonian. Muaj cov cwj pwm coj txawv txawv ntawm cov kua dej uas tsis yog-Newtonian suav nrog viscoelasticity, lub sijhawm nyob ntawm viscosity, thiab lwm yam.
Qhov txawv ntawm Newtonian thiab Tsis yog Newtonian Fluids yog dab tsi?
Cov kua dej tuaj yeem muab faib ua ob hom nyob ntawm qhov viscosity li Newtonian kua thiab cov kua tsis yog Newtonian. Qhov sib txawv tseem ceeb ntawm Newtonian thiab cov dej tsis yog Newtonian yog cov kua Newtonian muaj cov viscosity tas li, hos cov kua dej uas tsis yog-Newtonian muaj cov viscosity sib txawv. Tsis tas li ntawd, thaum xav txog tus nqi shear thiab shear stress, hauv Newtonian kua, peb tuaj yeem soj ntsuam qhov xoom shear tus nqi ntawm xoom shear stress. Qhov ntawd txhais tau tias; tus nqi shear yog ncaj qha proportional rau shear stress. Txawm li cas los xij, cov kua dej uas tsis yog-Newtonian muaj qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov siab shear.
Txawm hais tias cov kua dej feem ntau peb paub tias tsis yog-Newtonian kua, dej thiab cua raug suav tias yog cov kua Newtonian ntawm ib txwm muaj. Txawm li cas los xij, yuav luag tag nrho cov ntsev, cov khoom siv polymer molten, ntshav, tshuaj txhuam hniav, xim, pob kws hmoov txhuv nplej siab thiab ntau lwm cov kua dej yog cov kua uas tsis yog-Newtonian.
Cov hauv qab no qhia txog qhov sib txawv ntawm Newtonian thiab tsis yog Newtonian kua.
Summary – Newtonian vs Non Newtonian Fluids
Cov kua dej tuaj yeem muab faib ua ob hom nyob ntawm qhov viscosity li Newtonian kua thiab cov kua tsis yog Newtonian. Qhov sib txawv tseem ceeb ntawm Newtonian thiab cov dej tsis yog Newtonian yog cov kua Newtonian muaj qhov viscosity tas li, qhov uas tsis yog-Newtonian cov kua dej muaj qhov sib txawv viscosity.
