Write “True” or “False” for the following question: a) The velocities and pressure in a turbulent...
Write “True” or “False” for the following question:
a) The velocities and pressure in a turbulent flow fluctuate over time.
Homework Answers
True,
Both velocity and pressure fluctuates over time in a turbulent flow because the turbulence is caused due to pressure gradient and due to turbulence the eddies create fluctuations in velocity. The turbulence decreases over time because of the fluctuations and loss in energy . As the pressure generates at inlet it enhances turbulence , the velocity starts fluctuating and over time the pressure fluctuations reduces results in same proportion of reduction in velocity.
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Write “True” or “False” for the following question:
a) The velocities and pressure in a turbulent...
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.
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.
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
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.
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...
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...
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QUESTION 30 True or false? Systolic blood pressure remains relatively unchanged during exercise. True False
QUESTION 1 (T1) What is an adverse pressure gradient? (9.2) A. Where pressure increases with distance...
QUESTION 1 (T1) What is an adverse pressure gradient? (9.2) A. Where pressure increases with distance downstream O B. Where pressure decreases with distance downstream C. Where pressure is uniform in the flow D. Where pressure is pushing the iow downstream QUESTION 2 (T2) Where does an adverse pressure gradient occur on an airfoil? (9.2) O A. Leading edge O B. Near or after the point of maximum thickness O C.Only in a region where the boundary layer is turbulent...
question #39 Indicate whether the following statement is true or false. The cost flow of inventory...
question #39 Indicate whether the following statement is true or false. The cost flow of inventory should be consistent with the physical flow. True or False True False
TRUE FALSE Write T if the statement is true and F if the statement is false...
TRUE FALSE Write T if the statement is true and F if the statement is false 33) Long-term debt is a liability that is payable beyond one year from the date of the financial statements. 33) 34) The basic component of paid-in capital is common stock. 34) 35) Accounting is often called the language of business. 35) 36) If a company performs services an account, the revenue is not eamed until the cash is collected. 37) The amount of prepaid...
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.
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
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.
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...
QUESTION 1 (T1) What is an adverse pressure gradient? (9.2) A. Where pressure increases with distance downstream O B. Where pressure decreases with distance downstream C. Where pressure is uniform in the flow D. Where pressure is pushing the iow downstream QUESTION 2 (T2) Where does an adverse pressure gradient occur on an airfoil? (9.2) O A. Leading edge O B. Near or after the point of maximum thickness O C.Only in a region where the boundary layer is turbulent...
question #39 Indicate whether the following statement is true or false. The cost flow of inventory should be consistent with the physical flow. True or False True False
TRUE FALSE Write T if the statement is true and F if the statement is false 33) Long-term debt is a liability that is payable beyond one year from the date of the financial statements. 33) 34) The basic component of paid-in capital is common stock. 34) 35) Accounting is often called the language of business. 35) 36) If a company performs services an account, the revenue is not eamed until the cash is collected. 37) The amount of prepaid...
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