3.3. Stream River Bottom Mass Transfer Coefficient

Try these first

1. 1.

   What does the Sherwood number indicate?

   Hint

   Think about types of mass transport.

2. 2.

   What is a high Reynolds number indicative of?

   Hint

   Consider what turbulent flow means for fluid behavior.

3. 3.

   What is the Sherwood number a measure of?

   • A) Ratio of mass diffusion rates
   • B) Ratio of convective to diffusive mass transport
   • C) Measure of fluid viscosity

   Hint

   Think about what processes occur in fluid dynamics.

4. 4.

   True or False: A high Reynolds number indicates laminar flow.

   • True
   • False

   Hint

   Recall what laminar flow means.

5. 5.

   A river flows at a velocity of 3 m/s. If the characteristic length of the river is 1.5 m and the viscosity of the water is 0.001 Pa·s, calculate the Reynolds number.

   Hint

   Use the Reynolds number formula.

6. 6.

   Discuss the implications of using an average characteristic length when calculating the Sherwood number in varying flow conditions in a natural water body.

   Hint

   Think about the variability in flow conditions.