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In cgs units the unit is called the centistoke. The kinematic viscosity is the dynamic viscosity divided by the density of the fluid. Doing the same calculation in English units, noting that the standard value of gravitational acceleration is g32.174 ft/s 2, water at 4☌ (39.2☏) has a specific weight of The rationale for finding the density and specific weight of water at 4☌ in the foregoing discussion is that 4☌ is a reference temperature on which specific gravity is based. A centipoise is one hundredth of a poise, or one millipascal-second (mPas) in SI units (1 cP 10 3 Pas 1 mPas). The unit centiPoise = 0.001 Pa s and is is sometimes written mPa s. The poise is often used with the metric prefix centi-because the viscosity of water at 20 ☌ (standard conditions for temperature and pressure) is almost exactly 1 centipoise.

These viscosities are at 20☌ except for the blood and blood plasma which are at body temperature, 37☌, and for steam which is at 100☌. If you're more familiar with dynamic viscosity (greek letter mu), then it may help to know that v /p. v (greek letter nu) kinematic viscosity (units are length squared/time). Because of its density of 1 g/cm3 (varies slightly with temperature), and its dynamic viscosity is near 1 mPas (see Viscosity of water section), the. The Poise is used in the table because of its more common usage. p (greek letter rho) Density (units are mass/volume). More commonly used is the dyne sec/cm 2 which is called Poise. Viscosity has the SI units Pascal seconds (Pa s) which is called the Poiseuille. standard most popular system to measure relative dynamic viscosity of all. temperature t and concentration c hypothetical dynamic viscosity of solution at zero pressure dynamic viscosity of water JL(P,t,mO) kinematic viscosity density Units mol/kg MPa K dimen­ sionless (GParl (GPatl Pa s Pa s J. Viscosity of Liquids and Gases Viscosity of Liquids and Gases Liquids s (1 mPa.s 20C water viscosity) or Poise or. dynamic viscosity of the solution at pressure p.