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How do you calculate the viscosity index of a petroleum product with viscosity at 40 degree centigrade and is less than 2 cst?

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Is there any formula to calculate viscosity index?

Yes, the formula to calculate viscosity index is: [ VI = \frac{10^9\left[\left(\log_{10}(\eta_{100})\right) - \log_{10}(\eta_{40})\right]}{[(1 + \eta_{100} \times K_{V} - 1) \times (1 + \eta_{40} \times K_{V} - 1)]} ] Where (\eta_{100}) is the viscosity at 100°C and (\eta_{40}) is the viscosity at 40°C, and (K_V) is a constant depending on the fluid being tested.


How can I calculate the pressure in a pipe based on the flow rate and diameter of the pipe?

To calculate the pressure in a pipe based on the flow rate and diameter, you can use the formula for pressure drop in a pipe, which is given by the equation: Pressure (4 flow rate viscosity) / (pi diameter2) Where: Pressure is the pressure drop in the pipe Flow rate is the rate at which fluid flows through the pipe Viscosity is the viscosity of the fluid Diameter is the diameter of the pipe By plugging in the values for flow rate, viscosity, and diameter into this formula, you can calculate the pressure in the pipe.


How do you calculate viscosity from a stokes law graph?

Hmmm.. what is "stokes law graph" ? If Stokes Force = Fs, r=radius of a tube, v=velocity of a particle The formula of viscosity is Fs=6.pi.viscosity.r.v Then viscosity= Fs/(6.pi.r.v)


What is Einstein law of viscosity?

Einstein's law of viscosity is stated by the equation u = 1 + 2.5 (volume fraction of solid particles). This equation is only used to calculate the relative viscosity of a slurry of fine particles in low concentrations.


Derive the relation between relative viscosity and absolute viscosity?

Relative Viscosity often refers to that of a Polymer Solution and is defined as the ratio of the viscosity of the solution to the pure solvent. It is calculated experimentally by measuring the time that it takes for the pure solvent to pass through a certain tube, in certain conditions , and comparing it with the time it takes for the solution to pass through the same tube, in the same condition. The term Apparent Viscosity is used when you calculate the viscosity of a non-Newtonian fluid by applying equations that are derived for the viscosity of a Newtonian fluid. So it is not the actual viscosity. I hope this answers your question.


How does a falling ball viscometer measure viscosity of a fluid?

A falling ball viscometer measures the viscosity of a fluid by timing how long it takes for a ball to fall through the fluid. The viscosity of the fluid affects how quickly the ball falls, with more viscous fluids causing the ball to fall more slowly. By measuring the time it takes for the ball to fall, the viscometer can calculate the viscosity of the fluid.


What is the difference between viscosity and viscosity index?

Viscosity is resistance to flow of oil Viscosity Index is a scale to measure viscosity


Does soda have a low viscosity?

The viscosity is similar to the viscosity of water.


How do you find viscosity of given liquid by oscillating disc method?

To find the viscosity of a liquid using the oscillating disc method, you would typically place a disc in the liquid and oscillate it at a constant frequency. By measuring the torque required to keep the disc oscillating, along with other parameters like disc radius and frequency, you can calculate the viscosity using the equation specific to this method. This method is suitable for measuring the viscosity of Newtonian liquids.


What is formula to calculate k value of PVC resin?

The K value of PVC resin is calculated using the Fikentscher K value equation, which is K = (135.5 - 0.31 * log(viscosity)) * (1 - 0.008 * (log(viscosity) - 1)), where viscosity is the intrinsic viscosity of the PVC resin solution. In practice, the viscosity is typically measured using an Ubbelohde viscometer or an Ostwald viscometer. The K value is an important parameter that indicates the average molecular weight of the PVC resin and is used to classify different grades of PVC based on their properties and applications.


What is A and B in redwood viscometer?

In a redwood viscometer, A and B are constants used in the formula to calculate the viscosity of the fluid being tested. The formula is viscosity = A + B * time in seconds. The values of A and B are specific to the design of the redwood viscometer and are typically provided by the manufacturer.