Viscometer vs. Rheometer: Qhov txawv yog dab tsi?

Thaum koj tab tom nrhiav yuav lub viscometer los pab koj tswj kom zoo viscosity thaum koj luam ntawv, txheej txheej lossis pleev xim, koj tuaj yeem hla lwm hom kev ntsuas viscosity hu ua rheometer. Rheometers zoo ib yam li viscometers, tab sis lawv zoo li yuav kim dua. Qhov no yog ib feem vim lawv muaj ntau yam kev siv.

Muaj qee qhov sib txawv tseem ceeb ntawm ob lub cuab yeej, tab sis ua ntej peb piav qhia lawv peb yuav tsum tau tshawb xyuas luv luv ntawm rheology * domain.

rheology yog dab tsi?
Wikipedia muab peb cov ntsiab lus hauv qab no ntawm rheology:

Rheology yog kev kawm txog cov dej ntws, feem ntau hauv cov kua hauv lub xeev, tab sis kuj nyob rau hauv cov ntaub ntawv ntawm "soft solids" los yog cov khib nyiab uas teb rau cov ntaub ntawv siv zog nrog cov yas ntws es tsis yog elastic deformation ... Nws siv rau cov ntaub ntawv nrog complex Microstructures. xws li av nkos, sludges, suspensions, polymers thiab lwm yam iav yav dhau los (xws li silicates) raws li zoo raws li ntau yam khoom noj thiab additives, cov kua hauv lub cev (xws li ntshav) thiab lwm yam khoom lom los yog cov khoom mos uas yog cov khoom noj.

Cov kua dej uas tsis yog-Newtonian muaj cov khoom siv rheological ntau dua li cov kua Newtonian.

Xav txog zaum kawg koj mus rau lub tsev noj mov thiab muaj ib lub raj mis ketchup ntawm lub rooj. Koj ua li cas yog tias ketchup tsis ncuav? Koj co lub raj mis, ua rau ketchup ntws tawm. Qhov no yog vim ketchup yog cov kua uas tsis yog-Newtonian.

Dab tsi yog rheometer?
Nyob ntawm seb leej twg koj nug, tej zaum koj yuav hnov ​​​​tias lub rheometer yog ib qho ntawm cov viscometer, los yog vice versa. Kev hais lus, kev ntsuas viscosity yog ib feem ntawm kev ntsuas rheology, uas yog ib feem ntawm rheology - lub ntsiab lus tias viscosity poob rau hauv qhov loj dua ntawm rheology.

Txawm hais tias lawv raug cais li cas, kev ua haujlwm ntawm lub rheometer yog ntsuas cov khoom rheological ntawm cov kua dej, uas tseem ua rau cov viscosity ntawm cov kua dej uas tsis yog-Newtonian.

Txhawm rau ua kom tiav lawv txoj haujlwm, ntau tus rheometers siv qee hom shear force rau cov kua hauv kev sim. Kev ntsuas qhov kev ntxhov siab no ua rau cov khoom rheological ntawm cov kua dej, suav nrog nws cov viscosity (uas tsis yog sawv cev los ntawm ib qho nqi hauv rheology).

Kuv yuav tsum siv lub viscometer lossis rheometer?
Txawm hais tias koj xav tau viscometer lossis rheometer los saib xyuas cov viscosity hauv koj cov txheej txheem yog nyob ntawm cov kua dej uas koj ua haujlwm nrog. Qee cov viscometers (xws li resonant zaus viscometers) tuaj yeem siv qee qhov shear rau cov kua dej, yog li muab qee cov tswv yim koj yuav tau txais los ntawm rheometer. Qee cov tuam txhab lag luam yuav xav tau ob qho tib si, thaum lwm tus tuaj yeem siv ib lossis lwm qhov.