search
Log In
0 votes

For steady flow of a viscous incompressible fluid through a circular pipe of constant diameter, the average velocity in the fully developed region is constant. Which one of the following statements about the average velocity in the developing region is TRUE?

  1. It increases until the flow is fully developed.
  2. It is constant and is equal to the average velocity in the fully developed region.
  3. It decreases until the flow is fully developed.
  4. It is constant but is always lower than the average velocity in the fully developed region.
in Fluid Mechanics 24.6k points
recategorized by

Please log in or register to answer this question.

Answer:

Related questions

0 votes
0 answers
Water (density $= 1000 kg/m^{3}$) at ambient temperature flows through a horizontal pipe of uniform cross section at the rate of $1 kg/s$. If the pressure drop across the pipe is $100$ KPa, the minimum power required to pump the water across the pipe, in watts, is ______.
asked Feb 27, 2017 in Fluid Mechanics Arjun 24.6k points
0 votes
0 answers
Consider fully developed flow in a circular pipe with negligible entrance length effects. Assuming the mass flow rate, density and friction factor to be constant, if the length of the pipe is doubled and the diameter is halved, the head loss due to friction will increase by a factor of $4$ $16$ $32$ $64$
asked Feb 24, 2017 in Fluid Mechanics Arjun 24.6k points
0 votes
0 answers
For a steady flow, the velocity field is $\vec{V}=(-x^{2}+3y)\hat{i}+(2xy)\hat{j}$. The magnitude of the acceleration of a particle at $(1, -1)$ is $2$ $1$ $2\sqrt{5}$ $0$
asked Feb 27, 2017 in Fluid Mechanics Arjun 24.6k points
0 votes
0 answers
Consider steady flow of an incompressible fluid through two long and straight pipes of diameters $d_{1}$ and $d_{2}$ arranged in series. Both pipes are of equal length and the flow is turbulent in both pipes. The friction factor for turbulent flow though pipes is of the form, $f=K(Re)^{-n}$, where $K$ and ... $\left ( \dfrac{d_{2}}{d_{1}} \right )^{(5+n)}$
asked Feb 27, 2017 in Fluid Mechanics Arjun 24.6k points
0 votes
0 answers
The velocity profile inside the boundary layer for flow over a flat plate is given as $\dfrac{u}{U_{\infty }}= \sin \left ( \dfrac{\Pi }{2}\dfrac{y}{\delta } \right )$, where $U_{\infty}$ is the free stream velocity and $\delta$ is the local boundary layer thickness. If $\delta^{*}$ is the local ... $\dfrac{2}{\Pi } \\$ $1-\dfrac{2}{\Pi } \\$ $1+\dfrac{2}{\Pi } \\$ $0$
asked Feb 27, 2017 in Fluid Mechanics Arjun 24.6k points
...