Question

Difference between streamline and turbulent flows​

Answer 1

The smooth flow of a fluid, with velocity smaller than certain critical velocity (limiting value of velocity), is called streamline flow or laminar flow of a fluid.When a liquid flows such that each particle of the liquid passing a point moves along the same path and has the same velocity as its predecessor then flow is said to be streamlined flow. Streamline flow, also known as laminar flow, occurs in fluid substances. It is described as a flow where there is no mixing of layers, no turbulence, and no fluctuations in the velocity of the fluid particles, all of them remain constant. In contrast, to streamline flow, another flow is known as turbulent flow.

The irregular and unsteady flow of a fluid when its velocity increases beyond critical velocity are called turbulent flow.When the speed of the moving liquid, exceeds the critical speed vc, the motion becomes turbulent.

Answer 2

IT IS A VERY ABSURD QUESTION. STREAM LINE IS AN IMAGINARY LINE AND IF YOU DRAW TANGENT TO IT YOU WILL GET THE DIRECTION OF VELOCITY.COLLECTION OF STREAM LINES ARE CALLED STREAMTUBE.TURBULENT FLOW IS A FLOW WHERE STREAMLINES ARE NOT PARALLEL AND THEY CROSS EACH OTHER.FOR TURBULENT FLOW IN PIPE REYONLS NUMBER IS MORE THAN 4000 AND REYONLS NUMBER IS NOTHING BUT THE RATIO BETWEEN VISCOUS FORCE AND GRAVITY FORCE.AS LONG AS VISCOUS FORCE PREDOMINATES THE FLOW BECOMES LAMINAR.TURBULENT FLOW IS A ROUGH FLOW AND VELOCITY IS MUCH HIGHER THAN THE LAMINAR FLOW.REYNOLD NUMBER IS THE RATIO BETWEEN THE PRODUCT OF MASS DENISY,VELOCITY AND PIPE DIAMETER TO THE COEFFICIENT OF DYNAMIC VICOSITY.FOR TURBULENT FLOW THE VELOCITY INCREASE GRADUALLY AND THE VALUE OF REYNOLDS NO INCREASES.OTHER PARAMETERS ARE CONSTANT AND EVEN IT IS ASSUMED THE TEMPERATURE IS ALSO CONSTANT.TURBULENT FLOW LUMP OF MASS IS INTERCHANGED BETWEEN DIFFERENT LAYERS OF THE FLOW. IS AN INDISCIPLINED FLOW.