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  2. Flow measurement - Wikipedia

    en.wikipedia.org/wiki/Flow_measurement

    For pipe flows a so-called transit time method is applied where a radiotracer is injected as a pulse into the measured flow. The transit time is defined with the help of radiation detectors placed on the outside of the pipe. The volume flow is obtained by multiplying the measured average fluid flow velocity by the inner pipe cross-section.

  3. Plug flow - Wikipedia

    en.wikipedia.org/wiki/Plug_flow

    In fluid mechanics, plug flow is a simple model of the velocity profile of a fluid flowing in a pipe. In plug flow, the velocity of the fluid is assumed to be constant across any cross-section of the pipe perpendicular to the axis of the pipe. The plug flow model assumes there is no boundary layer adjacent to the inner wall of the pipe.

  4. Pitot tube - Wikipedia

    en.wikipedia.org/wiki/Pitot_tube

    In these kinds of measurements, the most practical instrument to use is the pitot tube. The pitot tube can be inserted through a small hole in the duct with the pitot connected to a U-tube water gauge or some other differential pressure gauge for determining the flow velocity inside the ducted wind tunnel. One use of this technique is to ...

  5. Water metering - Wikipedia

    en.wikipedia.org/wiki/Water_metering

    A velocity-type meter measures the velocity of flow through a meter of known internal capacity. The speed of the flow can then be converted into a volume of flow to determine the usage. There are several types of meters that measure water flow velocity, including jet meters (single-jet and multi-jet), turbine meters, propeller meters and mag ...

  6. Hagen–Poiseuille equation - Wikipedia

    en.wikipedia.org/wiki/Hagen–Poiseuille_equation

    The no slip boundary condition at the pipe wall requires that u = 0 at r = R (radius of the pipe), which yields c 2 = ⁠ GR 2 / 4μ ⁠. Thus we have finally the following parabolic velocity profile: = (). The maximum velocity occurs at the pipe centerline (r = 0), u max = ⁠ GR 2 / 4μ ⁠.

  7. Dynamic pressure - Wikipedia

    en.wikipedia.org/wiki/Dynamic_pressure

    In fluid dynamics, dynamic pressure (denoted by q or Q and sometimes called velocity pressure) is the quantity defined by: [1] = where (in SI units): q is the dynamic pressure in pascals (i.e., N/m 2, ρ (Greek letter rho) is the fluid mass density (e.g. in kg/m 3), and; u is the flow speed in m/s.

  8. Water hammer - Wikipedia

    en.wikipedia.org/wiki/Water_hammer

    To keep water hammer low, pipe-sizing charts for some applications recommend flow velocity at or below 1.5 m/s (4.9 ft/s). Fit slowly closing valves. Toilet fill valves are available in a quiet fill type that closes quietly. Non-slam check valves do not rely on fluid flow to close and will do so before the water flow reaches significant velocity.

  9. Tube and pipe benders - Wikipedia

    en.wikipedia.org/?title=Tube_and_pipe_benders&...

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Tube_and_pipe_benders&oldid=375667295"

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