Question

In: Other

How to calculate an average viscosity. Give equation for it.

How to calculate an average viscosity. Give equation for it.

Solutions

Expert Solution

Suppose we have a mixture of two liquids where the kinematic viscosity of one liquid A is ​​ν​a and that of another liquid B is vb, then the average kinematic viscosity of this mixture of liquids is given by the equation:

This equation was proposed by Gambill and is known as Gambill Method.


Another way of calculating the average viscosity of a mixture of liquids is determined by using Refutas equation:
In this method the Viscosity Blending Number (VBN) of each component is calculated using the following formula:

Where vi is the kinematic viscosity of component i.
After calculating this, the VBN of the mixture is calculated for which we have to calculate the average viscosity:

where xi is the mass fraction of component i.
Using the value of VBN of mixture, we can determine the average viscosity of that mixture using the following correlation:


If instead of mass fraction, volume fraction is given, then we use the following formula to determine VBN of each component:

where vi is the kinematic viscosity of component i.
Then VBN of the mixture is given by:

where Vi is the volume fraction of component i.
Therefore the average viscosity of the mixture is given by:

Here exp stands for exponential constant and has the value of 2.718

These are the formulae/ correlation used to determine the average viscosity.


Related Solutions

How to calculate the DuPont equation
How to calculate the DuPont equation
How do you calculate the intrinsic viscosity of a polymer solution given only: 1) Time for...
How do you calculate the intrinsic viscosity of a polymer solution given only: 1) Time for a solution to go through a viscometer 2) Concentration 3) Viscometer constant 4) Density, viscosity, and time of water passing through a viscometer I must calculate intrinsic viscosity and molar mass of cleaved and uncleaved PVOH solutions, but I am totally lost.
How does molecular shape and structure give rise to physical properties. (e.g, phase, viscosity, boiling point,...
How does molecular shape and structure give rise to physical properties. (e.g, phase, viscosity, boiling point, etc.) of a bustance.
How to calculate average Annual Growth Rate
How to calculate average Annual Growth Rate
how does magma viscosity affect the shape of volcanoes
how does magma viscosity affect the shape of volcanoes
List the 3 major factors that alter vascular resistance (diameter, length, viscosity) and then give a...
List the 3 major factors that alter vascular resistance (diameter, length, viscosity) and then give a specific example how we can alter each of those specific factors during our lifetime. In your example be sure to mention what impact that change has on blood distribution and a person’s health.
VISCOSITY OF FLUID
A liquid (ρ = 1000 kg/m3; μ = 2 × 10–2 N ∙ s/m2; v = 2 × 10–5 m2/s) flows tangentially past a flat plate with total length of 4 m (parallel to the flow direction), a velocity of 1 m/s, and a width of 1.5 m. What is the skin friction drag (shear force) on one side of the plate?
For liquids, the viscosity decreases as the temperature increases. For gases, the viscosity increases as the...
For liquids, the viscosity decreases as the temperature increases. For gases, the viscosity increases as the temperature increases. Your objective is to provide an explanation for these trends. You may do internet research, but your response must be in your own words and references provided. Your response must be typed and grammatically correct.
How are the ways to calculate FIFO, LIFO, and Average in different problems?
How are the ways to calculate FIFO, LIFO, and Average in different problems?
1. How to calculate the historical average return and the volatility of stock? 2. How to...
1. How to calculate the historical average return and the volatility of stock? 2. How to calculate the correlation matrix among different stocks? (can you show me with real examples)
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT