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Turbulent viscosity is a value which is assumed to be equal in all directions.
It is the same as Eddy Viscosity
This is a measure of a fluid which is being deformed by stress. The fact that it is turbulent just means it is changing so the internal friction or viscosity is changing constantly and this is why it is called turbulent. the internal friction is the friction within the object hence the term internal however this friction derives from the force of the fluid acting on the object. E.G if air is your fluid surrounding the object and the object is experiencing a change in the velocity of the air it will be exposed to a different amount of stress and will therefore have a different value for internal friction.
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What are examples of turbulent flow?
Smoke rising from a flame. At first the smoke rises with laminar flow before becoming turbulent just a few centimetres above the source.
Why poiseuille equation not applied to turbulent flow?
Coz poiseuille eq is for poiseuille flow, which is a laminar flow, not turbulent flow. And it also need to be a fully developed , pressure driven flow.
Empirical equations used in a turbulent flow system?
there are many empirical constellations in turbulent flow depending upon the conditions like whether flow is internal or external, flow over a flat plate of pipe etc. so its better to refer a book on fluid mechanics.
Can a sheet flow be turbulent?
No...because.., whatever maybe the velocity u pump the liquid in sheet, the velocity would be same at all points (i think bernoulli's theorem)
Describe the laminar sub-layer in hydraulic?
this is the region in the turbulent boundary layer zone,adjacent to the solid surface of the plate. in this zone, the velocity variation is influenced only by viscous effects.
