1.5. Fluid versus Solid

Try these first

1. 1.

   What happens when a shear force is applied to a solid?

   Hint

   Think about what solids do under pressure.

2. 2.

   Define the no-slip condition in your own words.

   Hint

   Consider what happens at the boundary layer.

3. 3.

   What characterizes fluids under shear stress?

   • They do not deform
   • They continuously deform
   • They return to original shape

   Hint

   Think about the properties of liquids.

4. 4.

   True or False: In the no-slip condition, fluid particles in contact with a solid surface have velocity equal to zero.

   • True
   • False

   Hint

   Remember the definition of no-slip condition.

5. 5.

   You have a tank filled with water and a submerged object. Explain how the no-slip condition affects the flow of water around the object and what design implications this has for creating hydrodynamic shapes.

   Hint

   Consider how forces act on the submerged object.

6. 6.

   Analyze a scenario where a fluid behaves unexpectedly due to violating the assumptions of incompressibility. Discuss the implications in an engineering design context.

   Hint

   Reflect on how pressure changes affect flow continuity.