FLUID MECHANICS AS PER AKTU

1. Department of Mechanical Engineering
Jahangirabad Institute of Technology, Barabanki-225203
Course- B. Tech
Branch- Mechanical Engineering
Subject- Fluid Mechanics
Subject Code-NCE-301
Author
Mr Md Ateeque Khan
Asst. Professor
MED
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2. Equation of motion for laminar flow
through pipes
• In fully developed laminar flow, each fluid particle moves at a constant axial
velocity along a streamline and the velocity profile u(r) remains unchanged in
the flow direction. There is no motion in the radial direction, and thus the
velocity component in the direction normal to flow is every-where zero. There
is no acceleration since the flow is steady and fully developed.
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3. Stoke’s Law
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4. Transition flow from Laminar toTubulent
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5. Turbulent Flow
Turbulent flow is a type of fluid (gas or liquid) 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
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6. Types ofTurbulent Flow
• Wall turbulent shear flow:
a) External Wall turbulent shear flow
b) InternalWall turbulent shear flow
• Free turbulent shear flow
• IsotropicTurbulence
• An-isotropicTurbulence
• Non-Homogeneous turbulence
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7. EddyViscosity
• The eddy viscosity hypothesis assumes that the Reynolds stresses can be related
to the mean velocity gradients and eddy (turbulent) viscosity by the gradient
diffusion hypothesis, in a manner analogous to the relationship between the stress
and strain tensors in laminar Newtonian flow.
Where is eddy viscosity.
dy
ud
dy
du
_
 

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8. Turbulent flow in smooth and rough pipe
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9. Minor Losses in Pipes
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10. Minor Losses Con…..
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11. Pipe in series
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12. Pipe in Parallel
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13. SIPHON
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14. Water Hammer
• Water hammer is a pressure surge or wave caused when a fluid (usually a liquid
but sometimes also a gas) in motion is forced to stop or change direction
suddenly (momentum change).
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