True/False Turbulent flow is the smooth flow of fluid through a pipe.
True/False Turbulent flow is the smooth flow of fluid through a pipe.
Homework Answers
Turbulent flow is a type of fluid flow, in which the fluid undergoes irregular fluctuations, or mixing, in contrast to laminar flow, in which the fluid moves in smooth paths or layers. In turbulent flow the speed of the fluid at a point is continuously undergoing changes in both magnitude and direction. The flow of wind and rivers is generally turbulent in this sense, even if the currents are gentle. The air or water swirls and eddies while its overall bulk moves along a specific direction.
So given statement in question is false
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True/False Turbulent flow is the smooth flow of fluid through a
pipe.
C) In compressible fluid flow through a smooth pipe with diameter d and constant volume flux...
C) In compressible fluid flow through a smooth pipe with diameter d and constant volume flux V 1. Estimate the viscous sublayer thickness. 2. Calculate the wall shear stress 3. Give the value of turbulent shear stress at the wall and at the pipe center. V-0.07854 m'/s, d-0.1m, V- 0.000001 m'/s, p- 1000kg/m3 Use the Prandtl equation to determine the friction factor
5) The following about turbulent flow in a pipe is true, EXCEPT a) The pipe cross-sectional...
5) The following about turbulent flow in a pipe is true, EXCEPT a) The pipe cross-sectional average velocity is half of the centerline velocity (i.e. V=0.5V.) b) The flow Reynolds number is beyond 4100 c) The flow consists of a viscous sublayer, a buffle layer (viscous and turbulent effect both important) and a fully turbulent region up to pipe centerline d) Reynolds-averaged (time mean) velocity is used to describe flow velocity
5) The following about turbulent flow in a pipe is true, EXCEPT a) The pipe cross-sectional...
5) The following about turbulent flow in a pipe is true, EXCEPT a) The pipe cross-sectional average velocity is half of the centerline velocity (i.e. V = 0.5V.) b) The flow Reynolds number is beyond 4100 c) The flow consists of a viscous sublayer, a buffle layer (viscous and turbulent effect both important) and a fully turbulent region up to pipe centerline d) Reynolds-averaged (time mean) velocity is used to describe flow velocity 6) The boundary layer (BL) theory does...
Which one of the following statements concerning fluid streamlines is true? A. In turbulent flow, two...
Which one of the following statements concerning fluid streamlines is true? A. In turbulent flow, two or more streamlines may cross. B. In steady flow, the pattern of streamlines does not change with time. C. In turbulent flow, streamlines can begin or end at any point. D. Streamlines are perpendicular to the velocity of the fluid at every point. E. In steady flow, streamlines must remain parallel and equally spaced.
Which of the following statements are true (could be multiple) for internal flow through a pipe?...
Which of the following statements are true (could be multiple) for internal flow through a pipe? In laminar flow, the Nusselt is higher for constant wall temperature compared to that for constant heat flux. In turbulent flow, the Nusselt number is higher at the pipe exit than at the pipe entrance In laminar flow, the Nusselt number is lower at the pipe exit than at the pipe entrance In laminar fully developed flow, the Nusselt number is independent of Reynolds...
34. A coal slurry is found to behave as a power law fluid, with a flow...
34. A coal slurry is found to behave as a power law fluid, with
a flow index of 0.3, a specific gravity of 1.5, and an apparent
viscosity of 70 cP at a shear rate of 100/s. What volumetric
flowrate of this fluid would be required to reach turbulent flow in
a 1/2 in. ID smooth pipe, which is 15 ft long? What is the pressure
drop in the pipe (in psi) under these conditions? Please show all
work, thank...
Question 1 a- The friction factor for laminar flow doesn’t depend on pipe roughness. .(True) (false)...
Question 1 a- The friction factor for laminar flow doesn’t depend on pipe roughness. .(True) (false) b- The friction factor for laminar flow can be directly calculated, but experiments are needed to find the friction factor for turbulent flow. . (True) (false) c- The head losses for an orifice meter and venture meter are about the same .(True) (false) d- Head loss can be expressed in dimensions of length . (True) (false) e Which of the following effects can be...
(a) Consider a flow through a circular pipe. If the fluid enters the pipe with a...
(a) Consider a flow through a circular pipe. If the fluid enters the pipe with a uniform velocity (Uin) and uniform temperature (Tin ), draw the radial temperature distribution T(r) at three distinct axial locations if the pipe is subjected to uniform heat flux along its surface. Do not forget to draw the boundary layers. Identify the developing and developed regions for this flow.
P6.67 P6.50 Water at 20°C is to be delivered through a 10-cm- diameter smooth pipe with...
P6.67 P6.50 Water at 20°C is to be delivered through a 10-cm- diameter smooth pipe with an average velocity of 0.1 m/s S. (a) Check that the flow is turbulent. (b) Find the frictional head loss per length of pipe. (c) If the flow is mistaken to be laminar, and the formula f 64/Rea is used, how large would be the error in calculating the answer to (b)?
True/False: v) True/False: Pressure always acts normal to a surface. vi) True /False: The fluid velocity...
True/False: v) True/False: Pressure always acts normal to a surface. vi) True /False: The fluid velocity is always tangent to a streamline. vii) True / False: Turbulent flows are not affected by surface roughness.
C) In compressible fluid flow through a smooth pipe with diameter d and constant volume flux V 1. Estimate the viscous sublayer thickness. 2. Calculate the wall shear stress 3. Give the value of turbulent shear stress at the wall and at the pipe center. V-0.07854 m'/s, d-0.1m, V- 0.000001 m'/s, p- 1000kg/m3 Use the Prandtl equation to determine the friction factor
5) The following about turbulent flow in a pipe is true, EXCEPT a) The pipe cross-sectional average velocity is half of the centerline velocity (i.e. V=0.5V.) b) The flow Reynolds number is beyond 4100 c) The flow consists of a viscous sublayer, a buffle layer (viscous and turbulent effect both important) and a fully turbulent region up to pipe centerline d) Reynolds-averaged (time mean) velocity is used to describe flow velocity
5) The following about turbulent flow in a pipe is true, EXCEPT a) The pipe cross-sectional average velocity is half of the centerline velocity (i.e. V = 0.5V.) b) The flow Reynolds number is beyond 4100 c) The flow consists of a viscous sublayer, a buffle layer (viscous and turbulent effect both important) and a fully turbulent region up to pipe centerline d) Reynolds-averaged (time mean) velocity is used to describe flow velocity 6) The boundary layer (BL) theory does...
Which one of the following statements concerning fluid streamlines is true? A. In turbulent flow, two or more streamlines may cross. B. In steady flow, the pattern of streamlines does not change with time. C. In turbulent flow, streamlines can begin or end at any point. D. Streamlines are perpendicular to the velocity of the fluid at every point. E. In steady flow, streamlines must remain parallel and equally spaced.
Which of the following statements are true (could be multiple) for internal flow through a pipe? In laminar flow, the Nusselt is higher for constant wall temperature compared to that for constant heat flux. In turbulent flow, the Nusselt number is higher at the pipe exit than at the pipe entrance In laminar flow, the Nusselt number is lower at the pipe exit than at the pipe entrance In laminar fully developed flow, the Nusselt number is independent of Reynolds...
34. A coal slurry is found to behave as a power law fluid, with
a flow index of 0.3, a specific gravity of 1.5, and an apparent
viscosity of 70 cP at a shear rate of 100/s. What volumetric
flowrate of this fluid would be required to reach turbulent flow in
a 1/2 in. ID smooth pipe, which is 15 ft long? What is the pressure
drop in the pipe (in psi) under these conditions? Please show all
work, thank...
(a) Consider a flow through a circular pipe. If the fluid enters the pipe with a uniform velocity (Uin) and uniform temperature (Tin ), draw the radial temperature distribution T(r) at three distinct axial locations if the pipe is subjected to uniform heat flux along its surface. Do not forget to draw the boundary layers. Identify the developing and developed regions for this flow.
P6.67 P6.50 Water at 20°C is to be delivered through a 10-cm- diameter smooth pipe with an average velocity of 0.1 m/s S. (a) Check that the flow is turbulent. (b) Find the frictional head loss per length of pipe. (c) If the flow is mistaken to be laminar, and the formula f 64/Rea is used, how large would be the error in calculating the answer to (b)?
True/False: v) True/False: Pressure always acts normal to a surface. vi) True /False: The fluid velocity is always tangent to a streamline. vii) True / False: Turbulent flows are not affected by surface roughness.
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