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Consequently, if a liquid has dynamic viscosity of n centiPoise, and its density is not too different from that of water, then its kinematic viscosity is around n centiStokes. For gas, the dynamic viscosity is usually in the range of 10 to 20 microPascal-seconds, or 0.01 to 0.02 centiPoise. The density is usually on the order of 0.5 to 5 kg/m^3.
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed. Annotation "(s)" indicates equilibrium temperature of vapor over solid. Otherwise temperature is equilibrium of vapor over liquid. Note that these are all negative temperature values. Methane vapor pressure vs. temperature.
The dilute gas viscosity contribution to the total viscosity of a fluid will only be important when predicting the viscosity of vapors at low pressures or the viscosity of dense fluids at high temperatures. The viscosity model for dilute gas, that is shown above, is widely used throughout the industry and applied science communities.
In the automotive industry the viscosity index is used to describe the change of viscosity with temperature. The reciprocal of viscosity is fluidity , usually symbolized by ϕ = 1 / μ {\displaystyle \phi =1/\mu } or F = 1 / μ {\displaystyle F=1/\mu } , depending on the convention used, measured in reciprocal poise (P −1 , or cm · s · g ...
The abbreviation CH 4-C can mean the mass of carbon contained in a mass of methane, and the mass of methane is always 1.33 times the mass of CH 4-C. [117] [118] CH 4-C can also mean the methane-carbon ratio, which is 1.33 by mass. [119] Methane at scales of the atmosphere is commonly measured in teragrams (Tg CH 4) or millions of metric tons ...
That is, the two oils with viscosity Y at 100 °C and a VI of 0 and 100 would have at 40 °C the viscosities of L and H respectively. These L and H values can be found in tables in ASTM D2270 [4] and are incorporated in online calculators. [5]
Tribromo-fluoro-methane Fluorotribromomethane Halon 1103 FC-11B3 ... data are given for materials in their standard state ... Viscosity at 0 ...
The ratio of the mass average to the number average is called the dispersity or the polydispersity index. [3] The mass-average molecular mass, M w, is also related to the fractional monomer conversion, p, in step-growth polymerization (for the simplest case of linear polymers formed from two monomers in equimolar quantities) as per Carothers ...