5.3.2. Boundary Conditions and Surroundings

Try these first

1. 1.

   Define a 'system' in fluid mechanics.

   Hint

   Think about fixed boundaries and interactions.

2. 2.

   What is a control volume?

   Hint

   Consider it as a box in space through which fluid flows.

3. 3.

   What defines a 'system' in fluid mechanics?

   • A fixed volume of any material
   • The entire environment of fluid flow
   • A specified quantity of fluid for analysis

   Hint

   Consider the volume that we're studying.

4. 4.

   True or False: A control volume can only have fixed boundaries.

   • True
   • False

   Hint

   Think about flowing systems.

5. 5.

   Design an experiment to analyze the drag and lift forces on a model aircraft in a wind tunnel. What considerations should be made during the design?

   Hint

   Think about how real-life aircraft are tested and the kind of data required.

6. 6.

   Calculate the drag force acting on a bird of mass 2 kg when winds at 30 km/h are present. Assume a drag coefficient of 0.5 and cross-sectional area of 0.1 m².

   Hint

   Make sure to convert km/h to m/s for the equation!