|MadSci Network: Physics|
Newtonian fluids have a constant viscosity at a given temperature. Hence Non-Newtonian fluids have a variable viscosity at a constant temperature. The viscosity will vary with the rate of shear of the fluid. Shear rate is defined as the difference between velocity of parallel faces of a fluid element divided by the distances between the faces.
The Viscosity of a fluid is its resistance to flow. To put things in simpler terms, a single grade motor oil is an example of a Newtonian fluid. Its viscosity remains constant at a constant temperature. Multigrade motor oils are non-Newtonian fluids. The viscosity at a temperature is inversely proportional to the rate at which the piston is moving through the cylinder. With the corn starch and water suspension, you should find a different viscosity with respect to the amount of force applied to the balloon.
DEFINITIONS MAY BE FOUND AT THE FOLLOWING WEBSITE:
Corn Starch Fluid at Fluid Mechanics Demonstrations.
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