2 in Gas formation volume factor and density : The viscosity is determined using the charts of Carr et al. The use of any of the calculators' results is at the user's sole risk. The formation volume factor is calculated from Eq. The use of the ideal gas law and the Redlich-Kwong compressibility factor for gas density calculation, and use of the Sutherland Formula for gas viscosity. The calculator on this site is for informative purposes only and we make no claims as to the accuracy, completeness or fitness for any particular purpose of the results produced by our calculators. The calculator can be a useful tool for predicting viscosity at a target temperature, but keep in mind that in real world applications a theoretical viscosity value should always be verified with a viscosimeter. The viscosity at the target temperature is calculated when you click the 'calculate' button. Formally, viscosity (represented by the symbol eta) is the ratio of the shearing stress (F/A) to the velocity gradient (vx/y or dvx/dy) in a fluid. The dependency of the kinematic viscosity on the temperature can be comparatively assessed by means of the viscosity index. It decreases with rising temperature, i.e. This page allows the user to enter two temperature-viscosity points, and a target temperature. Viscosity index calculator The viscosity of a fluid is its resistance to flow and is highly influenced by temperature. The calculator can be a useful tool for predicting viscosity at a. Lubricating oil producers normally publish the viscosity of their products at two different temperatures. The viscosity at the target temperature is calculated when you click the calculate button. ![]() Given two known temperature-viscosity points, the viscosity of a liquid can be calculated for a target temperature. The calculator below can be used to calculate the liquid water dynamic or kinematic viscosity at given temperatures. The viscosity of a liquid as a function of temperature can be approximated with the Andrade correlation. The kinematic viscosity is calculated from the dynamic viscosity by dividing by the density at the test temperature. Calculate the viscosity at a given temperature, when the viscosity is known at two temperatures.
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