1. CE 230-Engineering Fluid Mechanics
Lecture # 15 & 16
Fluid flow

2. Flowing fluids Static versus flowing fluid
Objectives of the part of course
Basic concepts and definitions

3. Types of flow Steady versus unsteady Uniform versus no uniform
1-D versus multi-D
Laminar versus turbulent

4. Development of flow pattern
Why not solve problem?
Flow visualization analog and experimental methods
Streamlines, streaklines and pathlines

6. Pathlines

7. Uniform flow

8. Non-uniform flow

9. Velocity distribution in a pipe- laminar vs turbulent flow

10. Volume flow rate, Q Q = ΔV/ Δt = dV/dt
Calculating Q if velocity is constant
Q=∫ v.dA
Mass flow rate

11. 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.

12. Example Find flow rate and average velocity in the triangular channel.
Given: maximum velocity = 6 ft/s.

13. Material derivative and Acceleration
Total acceleration
Local acceleration
Convective acceleration

14. Example (p 4-26)
Determine local, convective and total accelaration at x=0.5L and t= 3 s