What are the effects of viscosity?

A change of the fluid viscosity has effects on the pressure losses because a higher viscosity leads to more friction on the walls of the tank. We can see this effect on the formulas: if \nu increases, hence Re diminishes and \lambda increases: the friction is more important.

What do you expect to happen to terminal velocity as density increases as viscosity increases as radius increases?

As radius increases, the force of drag increases. As area, fluid density, or the drag coefficient increase, the terminal velocity decreases.

What do you mean by viscosity obtain an expression for terminal velocity of a ball falling in a viscous liquid?

∴ v = `2/9 (r^2g(rho – σ))/η` ….(1) This is the expression for the terminal velocity of the sphere falling under gravity through a viscous medium.

What is the effect of viscosity on the flow of liquids?

viscosity, resistance of a fluid (liquid or gas) to a change in shape, or movement of neighbouring portions relative to one another. Viscosity denotes opposition to flow. The reciprocal of the viscosity is called the fluidity, a measure of the ease of flow. Molasses, for example, has a greater viscosity than water.

How does viscosity affect flow rate?

The short answer is; as viscosity increases, flow rates decrease. * As a general rule, the further the fluid is from the pump, the lower the flow rate will be.

Does increase in viscosity causes increase in terminal velocity?

The more viscous a liquid, or the less it wants to flow, the more the restraining force will be exerted on the falling object, thus reducing its terminal velocity into a negative acceleration and it will slow down.

What happens if terminal velocity increases?

as the object’s speed increases, frictional forces such as air resistance or drag increase. at terminal velocity, the weight of the object due to gravity is balanced by the frictional forces, and the resultant force is zero.

What is the uncertainty in viscosity from only the diameter?

Assume that the densities are known exactly so that the uncertaint y in viscosity comes from only the sphere diameter and terminal velocity. The uncertainty in terminal velocity may be taken as its standard deviation. The deviations in the diameters of the spheres will be supplied by the manufacturer.

What is the effect of temperature on coefficient of viscosity?

In the case of liquids, coefficient of viscosity decreases with increase of temperature as the cohesive forces decrease with increase of temperature.In the case of gases,coefficient of viscosity increases with increase of temperature because the change in momentum of molecules increases with increase of temperature.

Why is the viscosity of a liquid is negative?

Viscosity The viscous force acting between two adjacent layers of a liquid is directly proportional to the surface area of the layers in contact and the velocity gradient. The viscous force acts tangential to the liquid and in opposite direction to the direction of flow of liquid. Hence negative sign is used.

What does the terminal velocity equation tell us?

The terminal velocity equation tells us that an object with a large cross-sectional area or a high drag coefficient falls slower than an object with a small area or low drag coefficient. A large flat plate falls slower than a small ball with the same weight.