2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Hauv rheology, shear thinning yog qhov tsis yog-Newtonian tus cwj pwm ntawm cov kua dej uas nws cov viscosity txo qis hauv cov txheej txheem shear. Nws yog qee zaum suav hais tias yog ib qho piv txwv rau tus cwj pwm pseudoplastic, thiab feem ntau txhais tau tias tsis suav nrog cov teebmeem ntawm lub sijhawm, xws li thixotropy.
Yuav ua li cas thaum shear thinning?
Shear thinning yog qhov tshwm sim ntawm qee qhov tsis yog-Newtonian cov kua dej uas cov kua viscosity txo qis nrog nce kev ntxhov siab. Shear thickening yog qhov opposite phenomenon.
piv txwv ntawm shear thinning yog dab tsi?
Shear thinning fluids, tseem hu ua pseudo-plastics, yog ubiquitous nyob rau hauv industrial thiab lom cov txheej txheem. Cov piv txwv xws li ketchup, xim thiab ntshav. Tsis yog-Newtonian tus cwj pwm ntawm cov kua dej tuaj yeem tshwm sim los ntawm ntau yam, tag nrho cov ntawm lawv muaj feem xyuam rau cov txheej txheem reorganization ntawm cov kua molecules vim ntws.
Yuav ua li cas koj thiaj paub tias shear thinning?
Shear thinning Performance index tuaj yeem xam los ntawm faib pom meej viscosity ntawm qhov qis tshaj plaws los ntawm tus nqi ntawm qhov pom tseeb viscosity ntawm qhov ceev tshaj plaws(feem ntau ntawm 2 thiab 20 lossis 5 thiab 50 rpm). Qhov txiaj ntsig piv tau yog qhov ntsuas ntawm shear thinning.
Vim li cas xim shear thinning?
Cov xim yog cov khoom sib cais uas feem ntau pom cov cwj pwm ua kom nyias nyias. Shear thinning tshwm sim vim qhov kev taw qhia shear-induced thiab disaggregation ntawm cov khoom nyob rau hauv cov kev taw qhia ntws.
Pom zoo:
Rau qhov siab tshaj plaws shear stress?
Qhov siab tshaj plaws shear stress yog sib npaug rau ib nrab ntawm qhov sib txawv ntawm tus thawj tswj hwm kev ntxhov siab. Nws yuav tsum raug sau tseg tias qhov sib npaug ntawm cov dav hlau tseem ceeb, 2θp, yields ob lub kaum sab xis ntawm 0 ° thiab 360 °.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Yuav ua li cas siv thinning shear?
Muab cov txiav ib nti los ntawm qhov ntev thiab tig lawv mus rau hauv kev coj ntawm cov plaub hau loj hlob. Txhua lub snip siv cov txiav txiav yuav tsum zoo li gliding ib comb los ntawm koj cov plaub hau, yog li thaum koj txiav koj, nco ntsoov thiab glide cov txiav txhua txoj hauv kev los ntawm koj qhov kawg.
Puas finasteride ua haujlwm rau diffuse thinning?
Ua tsaug, diffuse thinning tsis yog ib qho mob tas mus lithiab nws tuaj yeem kho tau yooj yim nrog tshuaj. Minoxidil, Finasteride thiab lwm yam DHT thaiv cov neeg ua haujlwm hauv cov tshuaj zawv plaub hau yog peb qhov kev xaiv nrov tshaj plaws.
Hauv kev ua haujlwm blanking lub kaum sab xis ntawm shear yog muab rau?
Nyob rau hauv kev xuas nrig ntaus thiab blanking kev ua haujlwm shear yog muab raws li ntawm punch lub ntsej muag thiab tuag ntsej muag rawsvim kev txiav txiav yuav tshwm sim raws li. Vim li cas lub kaum sab xis muab rau hauv kev ua haujlwm shearing?
