2. Topic:
Flow in Pipes
Presented By-
Md. Shahadot Hossain
Roll: 150802
Session: 2015-2016
Dept. of Petroleum and Mining
Engineering
3. Types of Fluid Flow
Generally three different types of fluid flow are-
1.Laminar flow
2.Turbulent flow
3.Transitional flow
4. Laminar Flow
In this type of flow,
๏Fluid particles moves along smooth
straight parallel paths in layers or laminas,
๏With one-layer gliding smoothly over an
adjacent layer,
๏The paths of individual fluid particles do
not cross those of neighboring particles
5. Turbulent flow
In turbulent flow,
๏there is an irregular random movement
of fluid in transverse direction to the
main flow.
๏the speed of the fluid at a point is
continuously undergoing changes in
both magnitude and direction.
6. Transitional flow
๏Transitional flow is a mixture of
laminar and turbulent flow,
๏Turbulence in the center of the
pipe, and laminar flow near the
edges.
7. Reynolds Number (Re)
๏The Reynolds number (re) is an important dimensionless
quantity in fluid mechanics
๏Used to help predict flow patterns in different fluid flow
situations.
๏Turbulent or laminar flow is determined by the
dimensionless Reynolds number.
8. Reynolds Number (Re)
Types of flow depend on the Reynold number ,
๏Re < 2300 โ flow is laminar
๏Re > 4000 โ flow is turbulent
๏2300 < Re < 4000 โ flow changes from laminar to turbulent.
10. Entrance Length
In fluid dynamics,
๏The entrance length is the
distance a flow travels after
entering a pipe before the flow
becomes fully developed.
๏Entrance length refers to the
length of the entry region,