Kinematic viscosity is desired as an output. It is designed for maximum backwards compatibility The method ‘Saybolt universal’ has a special formula implemented for itsĬonversion, from. Of a value will not yield exactly the original value. Some of those scales are converted linearly the rest use tabulated dataīecause the conversion is performed by spline functions, a re-conversion ‘westinghouse’, ‘zahn cup #1’, ‘zahn cup #2’, ‘zahn cup #3’, ‘zahn cup #4’, ‘saybolt furol’, ‘saybolt universal’, ‘scott’, ‘stormer 100g load’, ‘pratt lambert i’, ‘redwood admiralty’, ‘redwood standard’, ‘pratt lambert e’, ‘pratt lambert f’, ‘pratt lambert g’, ‘pratt lambert h’, ‘pratt lambert a’, ‘pratt lambert b’, ‘pratt lambert c’, ‘pratt lambert d’, ‘mac michael’, ‘murphy varnish’, ‘parlin cup #10’, ‘parlin cup #15’, ‘engler’, ‘ford cup #3’, ‘ford cup #4’, ‘kinematic viscosity’, ‘continental can’, ‘crown cork and seal’, ‘demmier #1’, ‘demmier #10’, The valid scales for this function are any of the following: If True, a conversion will be performed even if outside the limits ofĮither scale if False, and either value is outside a limit, anĮxception will be raised. String representing the scale that val should be converted to. String representing the scale that val is in originally. ‘kinematic viscosity’ if Engler or Barbey for the other
Viscosity value in the specified scale if Though they may not be in use much, some standards viscosity_converter ( val, old_scale, new_scale, extrapolate = False ) ¶Ĭonverts kinematic viscosity values from different scales which have \[\mu = 10^įirst temperature derivative of liquid viscosity, mu float
Viskositat von Gasen Und Gasgemischen.” Chemie Ingenieur Technik 46, no. “Ein Einfaches Verfahren Zur Berechnung Der If Psat is larger than P, the fluid may not be liquid dPr is set to 0. The example is from Reid (1987) all results agree.Ībove several thousand bar, this equation does not represent true behavior. This equation is entirely dimensionless all dimensions cancel. Viscosity of liquid at 1 atm or saturation, Returns mu_l_dense float Saturation pressure of the fluid mu_l float Finally, the article discusses how to use viscosity data to control your process.\[C = -0.07921+2.1616T_r-13.4040T_r^2+44.1706T_r^3-84.8291T_r^4+Ĭritical pressure of the fluid omega float While it describes the three most-popular measurement methods, the article focuses on rotational viscometers - outlining the different components and how to choose the right instrument for a particular purpose. This article provides an overview of viscosity and how it is used in the quality-control laboratory as well as on the production floor. It is important to note, however, that the viscosity value obtained from a rotational viscometer depends on the shape and speed of rotation of the spindle. While this rheological property can be measured via several different devices (flow cups, capillary tubes, and rotational viscometers), rotational viscometers have become the most popular choice, as it is relatively straightforward to operate and requires minimal testing and clean-up time. Viscosity - a measure of a fluid’s resistance to flow - is an important property of liquid and semi-liquid products that can be used for both process and product-quality control.
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