The viscosity of certain oil at 20 ℃ is 0.085 Pa.s and at 50 ℃ is...
The viscosity of certain oil at 20 ℃ is 0.085 Pa.s and at 50 ℃ is 0.015 Pa.s. At what temperature will its viscosity be 0.070 Pa.s
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The viscosity of certain oil at 20 ℃ is 0.085 Pa.s and at 50 ℃
is...
Consider an oil of density p 800 kg/m3, viscosity u 0.01 Pa.s (10 times the viscosity of water), ...
Consider an oil of density p 800 kg/m3, viscosity u 0.01 Pa.s (10 times the viscosity of water), heat capacity of Cp 2 k]/(kg K) and thermal conductivity of Koll -0.15 W/(mk). This oil flows at mass flowrate of 30 kg/minute through a copper pipe of d- 2 cm inner diameter, with wall thickness of t-1 mm. At the relevant conditions, copper has thermal conductivity of ke 400 W/(m.K). The copper pipe loses heat to the surroundings of Tsurr 20°C...
2. An oil having density of 833 kg/m3 and a viscosity of 3.3 x 103 Pa.s...
2. An oil having density of 833 kg/m3 and a viscosity of 3.3 x 103 Pa.s is pumped from an open tank to a pressurized tank held at 345 k Pa gauge. The oil is pumped from an inlet at the side of the open tank through a line of commercial steel pipe having an inside diameter of 0.07792 m at the rate of 3.494 x 103 m'/s. The length of the straight pipe is 122 m and the pipe...
4 Air (with density 6.08 k3 and viscosity coefficient 2.95 x 10 Pa.s) at an average pressure of 10 bar and a bulk temperature of 600 K flows through a 0.5 m long, 20 mm internal diameter circular tub...
4 Air (with density 6.08 k3 and viscosity coefficient 2.95 x 10 Pa.s) at an average pressure of 10 bar and a bulk temperature of 600 K flows through a 0.5 m long, 20 mm internal diameter circular tube at 3.0 m3 hr1. The heat flux from the tube wall is 10 kW m2. Calculate the heat transfer coefficient and the inside wall temperature of the tube. [Nu0.023 Re08 Pr04; Pr 0.69] [20 marks]
4 Air (with density 6.08 k3...
Two oils have the same kinematic viscosity at room temperature. Oil brand A has a viscosity...
Two oils have the same kinematic viscosity at room temperature. Oil brand A has a viscosity index (VI) of 100. Oil brand B has a VI of 220. At a temperature of -10°C which oil brand has a lower viscosity.
A blood vessel carries blood with a viscosity equal to 0.0035 Pa.s. If the vessel has...
A blood vessel carries blood with a viscosity equal to 0.0035 Pa.s. If the vessel has a radius equal to 1 mm and a length equal to 5 mm, what is its resistance in PRU? solve in PRU (b) The vessel from part (a) is connected in series to a second vessel with a resistance equal to 0.250 PRU. What is the total resistance of the two vessels? solve in PRU (c) If the pressure across the two vessels is...
. What are the units of viscosity in the SI and cgs systems? 5. Identify the...
. What are the units of viscosity in the SI and cgs systems? 5. Identify the tye of fluid below and determine its viscosity in Pa.s. 2 8 900- 700 600 500 CD 400 300 200 100 O- 0 10 20 30 40 50 60 70 80 90 100 110 Shear Rate (1/s)
The absolute viscosity for sesame oil is supposed to average 0.0248 Pa⋅s at 50 ∘C. Suppose...
The absolute viscosity for sesame oil is supposed to average 0.0248 Pa⋅s at 50 ∘C. Suppose a food scientist collects a random sample of 3 quantities of sesame oil and computes the mean viscosity for his sample to be ?⎯⎯⎯=0.0252 Pa⋅sx¯=0.0252 Pa⋅s at 50 ∘C Assume that measurement errors are normally distributed and that the population standard deviation of sesame oil viscosity is known to be ?=0.0003 Pa⋅s The scientist will use a one‑sample ?z‑test for a mean, at a...
A lubricating oil with a viscosity of 8. A lubricating oil with a viscosity of 0.1...
A lubricating oil with a viscosity of
8. A lubricating oil with a viscosity of 0.1 (N s)/m² is between two plates, one stationary and one moving. If the moving plate is moving with a velocity of 1.3 m/s and the distance between the plates is 0.4 cm, what is the shear stress t on the moving plate?
(10 pts.) #5. Oil of kinematic viscosity 50 x 10 ft/s is to be used in...
(10 pts.) #5. Oil of kinematic viscosity 50 x 10 ft/s is to be used in a prototype in which both viscous and gravity forces dominate. A model scale of 1:5 is also desired. What viscosity of model liquid is necessary to make both Froude number and Reynolds number the same in model and prototype?
3. If a Brookefield viscometer calibration curve was obtained as shown in the figure 3, determine...
3. If a Brookefield viscometer calibration curve was obtained as shown in the figure 3, determine the calibrated viscosity at 35°C if the measured viscosity is 2.6 Pas Difference in viscosity vs. temperature y = -0.0433x? - 3.1985x + 431.89 R?=0.9953 Viscosity publish Temp °C pa.s Viscosity Diff (Pa.S) measured pas 1.4 2.1 117 244 Difference pa.s 115.6 241.9 288.2 353.8 2.8 291 50 20 3.2 357 Temp (°C) Figure 3
Consider an oil of density p 800 kg/m3, viscosity u 0.01 Pa.s (10 times the viscosity of water), heat capacity of Cp 2 k]/(kg K) and thermal conductivity of Koll -0.15 W/(mk). This oil flows at mass flowrate of 30 kg/minute through a copper pipe of d- 2 cm inner diameter, with wall thickness of t-1 mm. At the relevant conditions, copper has thermal conductivity of ke 400 W/(m.K). The copper pipe loses heat to the surroundings of Tsurr 20°C...
2. An oil having density of 833 kg/m3 and a viscosity of 3.3 x 103 Pa.s is pumped from an open tank to a pressurized tank held at 345 k Pa gauge. The oil is pumped from an inlet at the side of the open tank through a line of commercial steel pipe having an inside diameter of 0.07792 m at the rate of 3.494 x 103 m'/s. The length of the straight pipe is 122 m and the pipe...
4 Air (with density 6.08 k3 and viscosity coefficient 2.95 x 10 Pa.s) at an average pressure of 10 bar and a bulk temperature of 600 K flows through a 0.5 m long, 20 mm internal diameter circular tube at 3.0 m3 hr1. The heat flux from the tube wall is 10 kW m2. Calculate the heat transfer coefficient and the inside wall temperature of the tube. [Nu0.023 Re08 Pr04; Pr 0.69] [20 marks]
4 Air (with density 6.08 k3...
. What are the units of viscosity in the SI and cgs systems? 5. Identify the tye of fluid below and determine its viscosity in Pa.s. 2 8 900- 700 600 500 CD 400 300 200 100 O- 0 10 20 30 40 50 60 70 80 90 100 110 Shear Rate (1/s)
A lubricating oil with a viscosity of
8. A lubricating oil with a viscosity of 0.1 (N s)/m² is between two plates, one stationary and one moving. If the moving plate is moving with a velocity of 1.3 m/s and the distance between the plates is 0.4 cm, what is the shear stress t on the moving plate?
(10 pts.) #5. Oil of kinematic viscosity 50 x 10 ft/s is to be used in a prototype in which both viscous and gravity forces dominate. A model scale of 1:5 is also desired. What viscosity of model liquid is necessary to make both Froude number and Reynolds number the same in model and prototype?
3. If a Brookefield viscometer calibration curve was obtained as shown in the figure 3, determine the calibrated viscosity at 35°C if the measured viscosity is 2.6 Pas Difference in viscosity vs. temperature y = -0.0433x? - 3.1985x + 431.89 R?=0.9953 Viscosity publish Temp °C pa.s Viscosity Diff (Pa.S) measured pas 1.4 2.1 117 244 Difference pa.s 115.6 241.9 288.2 353.8 2.8 291 50 20 3.2 357 Temp (°C) Figure 3
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