粘度

When two fluid layers move relative to each other, a friction force develops between them and the slower layer acts to slow down the faster layer. This internal resistance to flow is described by the fluid property called viscosity, which reflects the internal stickiness of the fluid. In liquids, viscosity arises from cohesive molecular forces, while in gases it results from molecular collisions. Except for the case of superfluidity, there is no fluid with zero viscosity, and thus all fluid flows involve viscous effects to some degree.

AI overview

Viscosity is a fluid's internal resistance to flow—essentially how "sticky" or thick a fluid is, caused by friction between moving layers of the fluid. This property matters because it affects how all fluids behave when they move, from how easily oil pours to how air flows around objects.

AI-generated from the Wikipedia summary — may contain errors.

In the Vinony graph

Vinony's link graph records 2,385 inbound references to 粘度, and connects out to mechanical stress, Newtonian fluid and International System of Units.

Vinony files it under Aerodynamics, Fluid dynamics and Viscosity.

Vinony links it to 80 Wikipedia language editions.

Key facts

Physical quantity.bgcolour: {red}
Physical quantity.name: Viscosity
Physical quantity.image: Viscosities|300px
Physical quantity.caption: A simulation of liquids with different viscosities. The liquid on the left has lower viscosity than the liquid on the right.
Physical quantity.unit of dynamic viscosity: Pa·s = (N·s)/m2 = kg/(s·m)
Physical quantity.symbols: ,
Physical quantity.dimension: \mathsf{M} \mathsf{L}^{-1} \mathsf{T}^{-1}

via Wikipedia infobox

Research

94,562 papers

On the universality of viscosity in supersaturated binary aqueous sugar solutions: Cryopreservation by vitrification.ReviewCryobiology · 2024Ruiz-Matus S, Goldstein PDOI: 10.1016/j.cryobiol.2024.104886
Surface Viscosity-Dependent Neurite Initiation in Cortical Neurons.Advanced biology · 2022Kao SH, Liang SY, Cheng PL et al.DOI: 10.1002/adbi.202101325
Porcine bile viscosity is proportional to density.Biorheology · 2020Minh NN, Obara HDOI: 10.3233/BIR-190238
Viscosity Prediction of High-Concentration Antibody Solutions with Atomistic Simulations.Journal of chemical information and modeling · 2023Prass TM, Garidel P, Blech M et al.DOI: 10.1021/acs.jcim.3c00947
Solution viscosity regulates chondrocyte proliferation and phenotype during 3D culture.Journal of materials chemistry. B · 2019Lee K, Chen Y, Li X et al.DOI: 10.1039/c9tb02204j
Understanding the mechanism of high viscosity food delaying gastric emptying.Food & function · 2024Liu W, Jin W, Wilde PJ et al.DOI: 10.1039/d4fo00319e
Viscosity and mixing properties of artificial saliva and four different mouthwashes.Biorheology · 2020Hinic S, Petrovic B, Kojic S et al.DOI: 10.3233/BIR-201008
Viscosity Landscape of Phase-Separated Lipid Membrane Estimated from Fluid Velocity Field.Biophysical journal · 2020Sakuma Y, Kawakatsu T, Taniguchi T et al.DOI: 10.1016/j.bpj.2020.01.009

via PubMed

Wikidata facts

Image: Honey from jar.jpg

Show 7 more facts

topic's main category: Category:Viscosity
studied by: rheology
Commons category: Viscosity
quantity symbol (string): μ
different from: plasticity
facet of: friction
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4

Sources (6)

via Wikidata · CC0

Article · 日本語

粘度（ねんど、ドイツ語: Viskosität、フランス語: viscosité、英語: viscosity）は、物質のねばりの度合である。粘性率、粘性係数、または（動粘度と区別するため) 絶対粘度とも呼ぶ。一般には流体が持つ性質とされるが、粘弾性などの性質を持つ固体でも用いられる。量記号にはμまたはηが用いられる。SI単位はPa·s（パスカル秒）である。CGS単位系ではP（ポアズ、10-1Pa·s）が用いられた。動粘度(後述）の単位として、cm2/s = 10−4m2/s = 1 St（ストークス）も使われる（即ち、1 mm2/s = 1 cSt（センチストークス））。工業的にはセイボルト秒も使われる。

Abstract from DBpedia / Wikipedia · CC BY-SA