![]() Poise is a unit of measurement used particularly for dynamic viscosity, while stokes is. Question 1: Two identical spherical drops of water are falling through air with a steady velocity of 20 cm/s. Poise and stokes are units of measure used to quantify viscosity. The equation can be expressed in terms of shear. This unit is so large that it is rarely used. The absolute viscosity is also known as the dynamic viscosity, and is often shortened to simply viscosity. The formula for viscosity shows that the. The SI unit of kinematic viscosity is the square meter per second m 2 /s, which has no special name. Intrinsic Viscosity (): The ratio of a solutions specific viscosity to the concentration of the solute. Stokes’ law shows that the frictional drag (F) is directly proportional to the weight of the sphere in other words F is proportional to r 3. Measured in stokes (St) or centistokes (cSt). ![]() ![]() Questions on Stoke's Law and Terminal Velocity Effective gravitational force weight - upthrust 4/3r 3 ( )g Therefore we have for the viscosity (): Viscosity () 2gr 2 ( - )/9v. ![]() The forces acting on the sphere are viscous drag force $F_D=6\pi\eta r v$, gravitational force $F_G=\frac.\nonumber Drag force $F_D$, buoyant force $F_B$ and gravitational force $F_G$ acting on a sphere of radius $r$ and density $\rho$ moving with velocity $v$ in a fluid of density $\sigma$ and viscosity $\eta$.Ĭonsider a sphere of radius $r$ and density $\rho$ moving with a velocity $v$ ina fluid of density $\sigma$ and viscosity $\eta$. The SI The SI unit of kinematic viscosity is square meter per second (m2/s), whereas the CGS unit for kinematic viscosity is the stokes (St, or cm s1. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |