3.4. Boundary Conditions and Velocity Distribution

Try these first

1. 1.

   Define viscosity and explain its significance in fluid flow.

   Hint

   Think about how different liquids behave when poured.

2. 2.

   What is the no-slip condition?

   Hint

   Consider what happens to a fluid at a boundary.

3. 3.

   What is Reynolds number primarily used for?

   • To measure velocity
   • To determine flow regime
   • To calculate pressure drop

   Hint

   Think about its relation to fluid motion.

4. 4.

   True or False: In laminar flow, fluid particles move in parallel layers with no mixing.

   • True
   • False

   Hint

   Revisit the concept of flow patterns.

5. 5.

   Consider a system where oil of viscosity 0.5 Pas flows through a circular pipe of diameter 0.2 m. If the pressure difference measured across 10 m is 500 Pa, calculate the average velocity.

   Hint

   Break down the formula and substitute the known values.

6. 6.

   A fluid flows between two parallel plates. The distance between plates is 0.05 m, and the viscosity is 0.1 Pas. If the maximum speed is measured at 2 m/s, find the discharge per unit width.

   Hint

   Focus on how to rearrange the equation for discharge.