Fluid Mechanics Topic
Why is it important to know if the flow is laminar or turbulent
?
Like why do we care to know whether its laminar or turbulent.
Please i need a correct logical answer. It has nothing to do with
reynolds number.
Problem 1: Laminar and Turbulent Flow When fluids flow, the
motion of the flow can either be steady and smooth (called laminar
flow) or unsteady and chaotic (called turbulent flow). Streamlines
for illustrative flows are shown to the right. A long time ago we
discussed the Reynolds number Re for an object of “size” ?? moving
at speed ?? through a fluid of density ?? and viscosity ??. Re =
?????? ?? Recall that for large Re, the relevant drag...
1) Choose a characteristic of turbulent flow below. A) Laminar
flow B) Produces kinetic energy C) Viscosity dominates the flowals
behavior D) The energy will always be potential energy E) Fluids
moving at different rates of speed when they go through or around a
solid object
2) The Lido deck is where A)there are large state rooms B)
Usually where you will find the pool C) The deck below Steerage D)
Where people embark
3) 100 million times better than...
Q. No 1). Differentiate between:
Laminar flow and turbulent flow
Reynolds number and Fraud Number
FPS system of units and SI system of units.
Explain each point in detail and provide figure or sketch to
explain. Each symbol should be defined clearly.
Q. No 2). State and explain Bernoulli’s equation
define each term of equation clearly.
Poiseuille flow describes laminar flow in a circular pipe. The
velocity distribution in such flow has a parabolic form. Prove that
the mean velocity is equal to one-half of the maximum velocity in
this type of flow. Be sure to show all of your work. (Hint: the
analysis is similar to that done for laminar flow between parallel
plates)
Concept 1: Does turbulent flow or laminar flow have a greater
heat transfer coefficient? Why?
Concept 2: For flow over a flat plate, why does the heat
transfer coefficient decrease the greater the distance from the
leading edge? (in answering, ignore the effects of flow regime
transitions. i.e. assume the flow over the plate is all laminar or
all turbulent).
The velocity profile for a steady laminar flow in a circular
pipe of radius R is given by
u=u0(1−r2R2) . If the fluid
density varies with radial distance r from the centerline
as ρ=ρ0(1+rR)14 , where
ρ0 is the fluid density at the pipe center,
obtain and choose the correct relation for the bulk fluid density
in the tube.
(1) Describe briefly the definition of fully developed laminar
flow.
(2) From governing laws for fully developed laminar flow, derive
an equation for fully developed laminar flow that shows the
relation between flowrate and pressure gradient.
What is external flow? What is internal flow? What is the Reynolds number? What is its physical interpretation? What are turbulent and laminar flows? Plot the variation of the local heat transfer coefficient for flow over a flat plate