2.2. Pressure Difference Calculation

Try these first

1. 1.

   What is viscosity?

   Hint

   Think of how syrup moves compared to water.

2. 2.

   How do you calculate density from specific gravity?

   Hint

   Specific gravity is a ratio.

3. 3.

   What indicates laminar flow?

   • Reynolds number < 2000
   • Reynolds number > 4000
   • Both

   Hint

   Think of the defined thresholds for flow types.

4. 4.

   True or False: The pressure gradient is the same throughout a laminar flow?

   • True
   • False

   Hint

   Recall what we discussed about consistent flow.

5. 5.

   Calculate the pressure drop in a 20-meter long horizontal pipe with a diameter of 50 mm carrying water at 15 m/s, with viscosity 0.001 Pa·s.

   Hint

   Convert all units to consistent SI units before calculations.

6. 6.

   If the specific gravity of a liquid is 0.95 and a 100 kg mass is collected in 5 seconds, find the pressure difference in a 10-meter pipe with 0.1 m diameter.

   Hint

   Always reassess your values using specific gravities.