A nanometre is connected to a section which is at a distance of about 4 to 6 times the pipe diameter upstream from orifice plate.

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Orifice meter consists of a flat rectangular plate.

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Orifice Meter can only be used for measuring rate of flow in open pipe like structure.

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What is the relationship between Orificemeter diameter and pipe diameter

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The Orificemeter has a smooth edge hole.

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Which is the cheapest device for measuring flow / discharge rate.

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Find the discharge through totally drowned orifice of width 2.3 m if the difference of water levels on both side of the orifice be 40 cm. The height of water from to and bottom of the orifice are 2.6 m and 2.75 m respectively.

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The below figure shows a pipe with a circular cross section of diameter 5 cm on the left end and a square cross section with diagonal 5 cm on the right end. Water enters the left end with a velocity 20 m/s and leaves the right end with a velocity V2. Find V2 (neglect losses in the pipe).

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The principle of Orificemeter is same as that of Venturimeter.

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Venturimeter is based on integral form of Euler’s equation.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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The Orificemeter readings are more accurate than Venturimeter.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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The Orificemeter readings are more accurate than Pitot tube readings.

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The diameter of a pipe at the section 1 is 9 cm. If the velocity of water flowing through the pipe at section 1 is 4.8 m/s and section 2 is 9 m/s, Determine the area at section 2.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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A water flows through a pipe at a velocity 2 m/s. The pressure gauge reading is 2 bar. The datum head is given to be 2 m. Find the piezometric head. (Assume all Bernoulli’s assumptions, Density of water = 1000 kg/m^3, g = 9.8 m/s^2).

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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A student wishes to find the velocity of air flowing through a pipe. He has a pressure gauge which displays only the dynamic pressure. The pressure gauge reads 0.018 mm Hg. Assume density of air to be 1.225 kg/m^3, find the velocity V of air (ρHg = 13600 kg/m^3).

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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The velocity distribution for fluid flow over a flat plate is given by u=2y-6y2 in which u is the velocity in metre per second at a distance of y metre above the plate. Determine the shear stress at y=0.15m.Take dynamic viscosity of fluid as 8.6 poise.

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The diameters of a pipe at the sections 1 and 2 are 8 cm and 13 cm respectively. Find the discharge through pipe if the velocity of water flowing through the pipe at section 1 is 6 m/s. Determine also the velocity at section 2.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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A single coloumn manometer is connected to a pipe containing a liquid of specific gravity 0.75. Find the pressure in the pipe if the area of reservoir is 250 times the area of tube for the manometer reading. The difference in mercury level is 40 cm. On the left limb the fluid is upto the height of 20 cm.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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A pipe line which is 6 m in diameter contains a gate valve. The pressure at the centre of the pipe is 25 N/cm2. If the pipe is filled with specific gravity 0.8, find the force exerted by the oil upon the gate.

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When is orifice called ‘large orifice’?

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In case of submerged orifice the discharge is substantially dependent on temperature of fluid

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In case of any orifice, velocity always remains constant and hence discharge can be calculated.

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The greatest and the least depth of a circular plate of 4 m diameter from the free surface of water are 3m and 1 m respectively as shown. What will be the depth (in m) of it’s centre of pressure?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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The greatest and the least depth of a circular plate of 4 m diameter from the free surface of water are 3m and 1 m respectively as shown. What will be the total pressure in (kN) on the plate?

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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A wooden cylinder of sp.gr. = 0.6 and circular in cross-section is required to float in oil(sp.gr. = 0.90). Find the L/D ratio for the cylinder to float with its longitudinal axis vertical in oil, where L is the height of cylinder and D is its diameter.

asked Jan 30, 2022 in Fluid Mechanics by Charlotte (118k points)

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Find the total pressure on a rectangular plate of dimensions 2×3 m immersed in a fluid of specific gravity 0.65 at a depth of 6 m from the surface.

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