Kinematic viscosity equation5/4/2023 ![]() ITTC Recommended Procedures 7.5 - 02 01 - 03 of 6 Testing and Extrapolation Methods, General. One with a VI of 100 and one with a VI of 0. Kinematic Viscosity v u/p (kg/ (m x s) x 10 -3) / (kg/m 3) m 2 /s x 10 -6 The cgs physical unit for kinematic viscosity is the stokes (St), named after George Gabriel Stokes. Values of Kinematic Viscosity for Fresh Water Values of Kinematic Viscosity for Salt Water. ![]() (2) As, Dynamic viscosity () Tangential Force × distance between layers × A r e a × v e l o c i t y -1. (1) As, Density Mass × V o l u m e -1 (density) M1 L0 T0 × M0 元 T0-1 The dimensional formula of density M1 L-3 T0. However, the most common unit of viscosity is the dyne-second per square centimeter (dyne s/cm 2) where 1 dyne 10-5 N. Kinematic viscosity () Dynamic viscosity × D e n s i t y -1. The term 0 is the experimental viscosity at shear stress approaching zero. Where the term is the experimental value at high shear stress. The symbol for absolute (dynamic) viscosity is mu: µ (although eta is also sometimes used). Also in common use is Poise (P) although this is often quoted as cP (centiPoise). A widely used formula for the calculation of viscosity of gases is the Sutherland Equation given by. Reiner and Phillippoff suggested the following formula: dUx dy ( 1 0 1 ( xy s)2)xy. The SI unit for absolute (dynamic) viscosity is Ns/m 2 (or 1Kg/ms). Kinematic viscosity, abbreviated as \(\nu \) (Greek symbol nu), is the ratio of dynamic viscosity to density or the resistive flow of a fluid under the influance of gravity. for the unknown oil: Y cinematic viscosity 100 C and U cinematic viscosity 40 C. Using the SI units of viscosity, shear stress was in N/m 2 and shear rate was in (m/s)/m 1/s, so dynamic viscosity has units of Ns/m 2 (newton-seconds per meter squared) or Pa s (pascal-seconds). The higher viscosity is more dominate at low shear stress.
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