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Simply continuity law apply:

Q=AV

Q= flow rate

A=Area

V= Velocity

Normally velocity is around 1 m/s to 3 m/s.Pipe area calculted by it size.

We get the answer of flow rate.

Regards

Nehal uddin.

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Less then 8 FPS (depending on the material ) SeeHazen - Williams

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Q: What is optimum flow rate for laminar flow in water pipe?
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What are examples of laminar and turbulent flow?

The Reynolds number, Re = VD/υ, can be used to measure the laminarity of flow. The smaller the Reynolds number, the more laminar the flow. Therefore, to achieve better laminar flow, V and D (velocity of fluid and diameter of pipe) should be small and υ, the kinematic viscosity of the fluid, should be large. Therefore, since pipe diameter and viscosity is fixed in this circumstance, the slower the velocity of the flow, the more laminar the flow. Open the faucet to a small degree and the flow will be laminar. Turn the facet open fully will (for some faucets) cause turbulent flow depending on the maximum velocity of water allowed by the faucet.


What are possible causes of laminar flow in a convector pipe of a radiant panel system?

The cause can be easily found by checking Hazen -williams formula's


Will water flow more easily through a wide pipe or a narrow pipe?

it would flow more easily through a narrow pipe


What is meant by Hydraulic smooth pipe?

The original answer is incorrect (at least in the North American meaning of the term 'Hydraulically smooth'. Hydraulically smooth mean that the roughness on the wall of the pipe is less than 1/2 of the thickness of the viscous sublayer of the turbulent flow. The viscous sublayer is (well) less than 1% of the pipe diameter. The viscous sublayer thickness is calculated as: t=5D*(8^0.5)/((f^0/5)*Re where t is the thickness, D is the Diameter, f is the Darcy Friction Factor (found from the Moody Diagram or the Colebrook Equation, and Re is the Reynolds number, based upon pipe diameter and the average flow velocity in the pipe. Re = u*D/v u is average velocity v is kinematic viscosity As a last comment on the old response, it is in fact describing the critical flow rate for transition to turbulence (i.e. the flow rate for Re ~= 2300). The exact value for transition to turbulence is dicey to determine, and does, as the answer says, depend on the roughness and disturbances. Further, as the equation for Reynolds number shows, the transition to turbulence also depends on diameter. Laminar (not turbulent) flow is often called 'smooth', and the study of fluid motion is hydraulics, so it's easy to get the meaning of 'hydraulically smooth', mixed up with 'smooth (laminar) flow' *****Old (incorrect) response***** The flow rate inside a pipe that will produce laminar(No turbulence) flow. The physical smoothness plays a part but need not be as smooth as glass. A concrete, cast iron , copper and glass pipe can all produce laminar flow. The flow rate at which turbulence begins (no longer hydraulically smooth) will depend upon the surface texture where rougher surfaces will cause turbulence to occur at lower flow rates compared to a smoother material. Raise the flow rate enough and your will eventually get turbulence. So to have hydraulically smooth pipes you would need to spec no only the material but diameter as well to ensure laminar flow up to the max expected flow rate. Also any turbulence inducing fittings would also be included. For example a bar grate in a storm water system could be installed such that hydraulically smooth flow is maintained for low flow rates. (The water ca easily pass around the bars). During the high flows a storm would produce the bar grate would cause a restriction and you would no longer have smooth flow.


What condition is needed for the continuous flow of water in a pipe?

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Related questions

What are examples of laminar and turbulent flow?

The Reynolds number, Re = VD/υ, can be used to measure the laminarity of flow. The smaller the Reynolds number, the more laminar the flow. Therefore, to achieve better laminar flow, V and D (velocity of fluid and diameter of pipe) should be small and υ, the kinematic viscosity of the fluid, should be large. Therefore, since pipe diameter and viscosity is fixed in this circumstance, the slower the velocity of the flow, the more laminar the flow. Open the faucet to a small degree and the flow will be laminar. Turn the facet open fully will (for some faucets) cause turbulent flow depending on the maximum velocity of water allowed by the faucet.


What is the flow rate of water through a 20 inch pipe at 2500 psi?

For laminar flow? For a full pipe? for a 3/4-full pipe? For a 1/2-full pipe? It all makes quite a difference. Please repost your question with a little more information. It would also help to for us to know the coefficient of friction of the inside of the pipe.


What are disadvantages and advantages of laminar flow?

Disadvantage: It takes energy to move the fluid. Advantage: It helps boats move since there aren't any waves.


Is flow in a Venturi tube laminar or turbulent?

In laminar flow, air resistance is proportional to velocity of the body whereas in turbulent flow, air resistance is proportional to (velocity)2.


What are possible causes of laminar flow in a convector pipe of a radiant panel system?

The cause can be easily found by checking Hazen -williams formula's


What condition is necessary for the sustained flow of water in a pipe?

negative pressure is needed for a sustained flow of water in a pipe.


What condition necessary for the sustained flow of water in a pipe?

negative pressure is needed for a sustained flow of water in a pipe.


Will water flow out of a pipe if the pipe is covered with water?

Yes, as long as the water coming out of the pipe has a greater pressure than the water that is covering the pipe. If it is the other way around, the water covering the pipe will actually flow into the pipe. Think about it. It just makes sense.


Will water flow more easily through a wide pipe or a narrow pipe?

it would flow more easily through a narrow pipe


The flow of electricity can be compared to the circulation of water in a?

A pipe. The volume of water available can be compared to voltage. The diameter of pipe could be compared to resistance with smaller diameter being larger resistance and the flow of water past a point in pipe is equivalent to current flow.


What is turbulent vs laminar flow?

An air plane wing or anything that reduces drag like an arrow,dart, or even fish. Other examples could be the fins of dolphins, blood through arteries, water in a tube. Just remember that laminar flow is flow in which the fluid flows smoothly without much resistance. The fluid pretty much travels in straight or almost straight lines.


Water flow rate half inch PVC pipe 65 psi?

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