Lub ntsiab txhais ntawm pom meej viscosity
Apr 15, 2025
Pom meej viscosity yog qhov tseem ceeb ntsuas rau kev ntsuas cov kua dej, siv los ua kom pom cov kab mob ventcous ntawm cov kua dej tsis huv. Nws cov tub ntxhais nyob hauv kev xav txog qhov "pom meej viscous tiv thaiv" kev nthuav tawm los ntawm cov kua thaum ntws tawm, uas sib txawv nrog cov kab viscosity tas li ntawm cov kua dej hauv Newton.
Cov ntsiab lus yooj yim thiab kev qhia lej kev qhia
Pom meej viscosity yog siv los piav txog cov hom phiaj viscosity ntawm cov kua dej tsis zoo. Rau cov kua dej chmonian, viscosity yog tus nqi sib txawv (xws li cov dej viscas (xws li cov ntshav, polymer melts) tuaj yeem sib txawv vim yog cov rog sab nraud. Qhov tseeb viscosity (ηₐ) yog xam siv cov mis ηₐ=τ, τ yog qhov kev ntxhov siab shear thiab ṍ yog tus nqi shear. Piv txwv li, lws suav sau ua qhia tawm zuj zus ntawm viscosity thaum compression (ntawm high shear tus nqi), thaum nws lub zog viscosity thaum lub sij hawm sawv ntsug (ntawm qis shear nqi).
