13.1.5. Pressure and Viscosity

Try these first

1. 1.

   Define pressure in your own words.

   Hint

   Think about how weight is distributed over a surface.

2. 2.

   What is viscosity?

   Hint

   Consider how honey flows compared to water.

3. 3.

   What is the formula for pressure?

   • P = F/A
   • P = A/F
   • P = F*A

   Hint

   Remember how force distributes over a surface.

4. 4.

   True or False: Viscosity describes how easily a fluid flows.

   • True
   • False

   Hint

   Think about thick vs. thin fluids.

5. 5.

   Design a comprehensive experiment to measure the pressure variation across different fluid densities and flow rates. Discuss the use of dimensionless parameters in reducing your experimental workload.

   Hint

   Consider how different densities affect pressure and why that matters in design.

6. 6.

   Given a scenario where a sphere is moving through a viscous fluid, calculate the drag force acting on it and how changing viscosity would affect this force. Use dimensionless analysis to support your conclusions.

   Hint

   Think about how increasing viscosity would change flow patterns around the sphere.