Cavitation is more pronounced in rough pipes than smooth surfaced pipes.

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The surface tension of fluid in contact with air at 25℃ is 0.51N/m. The pressure inside a droplet is to be 0.05 N/cm2 greater than outside pressure. Determine the diameter of the droplet of water.

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Determine the minimum size of glass tube that can be used to measure water level if the capillary rise in the tube is restricted to 5mm. Consider surface tension of water in contact with air as 0.073 N/m

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An oil of vicosity 7 poise is used for lubrication between shaft and sleeve. The diameter of shaft is 0.6 m and it rotates is 360 rpm. Calculate the power lost in oil for a sleeve length of 160mm. The thickness of oil film is 1.0mm

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Find the capillarity rise or fall if a capillary tube of diameter .03m is immersed in hypothetical fluid with specific gravity 6.5, surface tension 0.25 N/m and angle of contact 147°.

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Calculate the magnitude of capillary effect in millimeters in a glass tube of 7mm diameter, when immersed in mercury. The temperature of the liquid is 25℃ and the values of surface tension of mercury at 25℃ is 0.51 N/m. The angle of contact for mercury is 130°.

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

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For liquid fluids will capillarity rise (or fall) increase or decrease with rise in temperature.

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If a fluid of certain surface tension and diameter is used to create a soap bubble and a liquid jet. Which of the two, bubble or liquid jet, will have greater pressure difference on the inside and outside.

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What will be the diameter (in mm) of a water droplet, the pressure inside which is 0.05 N/cm^2 greater than the outside pressure? (Take surface tension as 0.075 N/m)

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

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The ratio of the surface tension S and density ρ of liquid 1 and 2 are 1:2 and 1:4 respectively. Equal amount of the two liquids is poured into two identical tubes. what will be the ratio of the rise in the liquid level in the two tubes? (Assume the angle of contact to be same)

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The rise in the level of a liquid in a tube is h. What will be the rise in the level if the same amount of liquid is poured into a tube of half the diameter.

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The rise in the level of a liquid in a tube is h. If half the amount is poured outside, what will be the new rise in liquid level?

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A water drop of diameter 1 cm breaks into 1000 similar droplets of same diameter. What will be the gain or loss in the surface energy? (Take surface tension as 0.075 N/m)

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

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A soap bubble of d mm diameter is observed inside a bucket of water. If the pressure inside the bubble is 0.075 N/cm^2, what will be the value of d? (Take surface tension as 0.075 N/m)

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

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A liquid jet of 5 cm diameter has a pressure difference of N/m^2. (Take surface tension as 0.075 N/m)

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Which of the following contribute to the reason behind the origin of surface tension?

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Which of the following machines have the possibility of cavitation?

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If the fluid is incompressible, do thermodynamic properties play an important role in its behaviour at varying temperature and pressure?

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A cylinder of 0.8 m3 in volume contains superheated steam at 70℃ and .4 N/m^2 absolute pressure. The superheated steam is compressed to .3 . Find pressure and temperature.

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

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Equal amount of a particular liquid is poured into three similar containers, namely 1, 2 and 3, at a temperature of T1, T2 and T3 respectively. If T1 < T2 < T3, the liquid in which container will have the highest vapor pressure?

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

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What is the characteristic variation shown by the thixotropic fluids in their shear stress vs. rate of shear strain graph?

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

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The space between two plates (20cm*20cm*1cm), 1 cm apart, is filled with a liquid of viscosity 1 Poise. The upper plate is dragged to the right with a force of 5N keeping the lower plate stationary. What will be the velocity in m/s of flow at a point 0.5 cm below the lower surface of the upper plate if linear velocity profile is assumed for the flow?

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

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Two horizontal plates placed 250mm have an oil of viscosity 20 poises. Calculate the shear stress in oil if upper plate is moved with velocity of 1250mm/s.

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

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

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