Question
Explain how the density of the fluid affects the flow as laminar or turbulent?
| A. |
Increased density –> Increased probability of turbulence
|
| B. |
Increased density –> Decreased probability of turbulence
|
| C. |
Decreased density –> Increased probability of turbulence
|
| D. |
Normal density –> Decreased probability of turbulence
|
Show Answer
|
Correct Answer � A
Explanation
|
|
Ans. A. Increased density –> Increased probability of turbulence.
- Reynold’s number (R e ) determines whether flow in a tube will be laminar or turbulent:
- Re = vD∂ / η,
- v is velocity,
- D is the diameter of the tube
- ∂ is the density of the fluid
- η is the viscosity of the fluid.
- Assuming other variables are held constant, increased velocity, tube diameter, and density of fluid are associated with a greater likelihood of turbulence; increased viscosity is associated with a greater likelihood of laminar flow.
