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CE 230-Engineering Fluid Mechanics
Lecture # 15 & 16
Fluid flow
Flowing fluids
Static versus flowing fluid
Objectives of the part of course
Basic concepts and definitions
Types of flow
Steady versus unsteady
Uniform versus no uniform
1-D versus multi-D
Laminar versus turbulent
Development of flow pattern
Why not solve problem?
Flow visualization analog and experimental methods
Streamlines, streaklines and pathlines
Pathlines
Uniform flow
Non-uniform flow
Velocity distribution in a pipe- laminar vs turbulent flow
Volume flow rate, Q
Q = ΔV/ Δt = dV/dt
Calculating Q if velocity is constant
Q=∫ v.dA
Mass flow rate
Example 5.3
Find flow rate and average velocity in the 5 m wide channel.Given: d = 2 m and maximum velocity = 3 m/s.
Example
Find flow rate and average velocity in the triangular channel.Given: maximum velocity = 6 ft/s.
Material derivative and Acceleration
Total acceleration
Local acceleration
Convective acceleration
Example (p 4-26)
2)/5.01(2
LxtV
Determine local, convective and total accelaration at x=0.5L and t= 3 s