This does not yet include AV's latest tweaks (M3 above) - however the differences for most applications should be quite minor. The other (written by A.V.) takes theĪ python version has now also been written by Matthew Partridge at Cranfield University. One takes volume fraction of glycerine as input. Further refinements from Andreas Volk to density of pure water, and the temperature-dependence of the contraction of the mixture. The density is usually on the order of 0.5. In both cases the fit was chosen to match data from Gregory (table 3 and 7) For gas, the dynamic viscosity is usually in the range of 10 to 20 microPascal-seconds, or 0.01 to 0.02 centiPoise. Glycerine: 1.5 Pancake syrup: 2. It is adjudged that this standard value has an accuracy of ☐.1. The most frequently used systems of US customary, or Imperial, units are the British Gravitational. the viscosity of water at 20° C and a pressure of 0.1 MPa has led to the recommendation that the value p, (20☌) 1002.0 p,Pa s be adopted as a standard 1, 3, 4. It is adjudged that this standard value has an accuracy of 0.1. Andreas Volk pointed out that the density calculation can be made more accurate by (i) accounting for the volume contraction of the mixture (ii) adjusting the fit for the density of pure glycerine as a function of temperature. The kinematic viscosity of water at 20 ☌ is about 1 cSt. the viscosity of water at 20 C and a pressure of 0.1 MPa has led to the recommendation that the value p, (20C) 1002.0 p,Pa s be adopted as a standard 1, 3, 4. Thanks to Paul Debue for pointing this out. The mixture should use the glycerine fraction by VOLUME and not by mass. The viscosity of water (fresh or salt) at 20C is approximately 0.01 P. Density calculation has been changed: equation 25 in Cheng's paper to compute the density of the kinematic viscosity of water at 68.4oF is for all practical purposes. I'd recommend reading the latter paper first. Kähler (2018) Experiments in Fluids 59 75. 47 3285-3288, with a number of adjustments (see below), which are described in Volk and The calculation is based on the parameterisation in Cheng (2008) Ind. Calculate density and viscosity of glycerol/water mixturesĭynamic viscosity of mixture is :
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