7.4.2. Assumptions for Deriving Equations

Try these first

1. 1.

   What does incompressible flow mean?

   Hint

   Think about what happens to the fluid's density during flow.

2. 2.

   Define isothermal flow.

   Hint

   Consider scenarios where temperature changes are not significant.

3. 3.

   What is the primary assumption of incompressible flow?

   • a) Density increases
   • b) Density remains constant
   • c) Density is variable

   Hint

   Think about the meaning of incompressibility.

4. 4.

   True or False: Isothermal flow means the temperature of the fluid can change.

   • True
   • False

   Hint

   Reflect on what 'isothermal' implies regarding temperature.

5. 5.

   Discuss what happens to flow assumptions in a scenario where a fluid is heated rapidly. How does this challenge the assumptions of incompressibility and isothermal conditions?

   Hint

   Consider the implications of thermal expansion and variations.

6. 6.

   Provide a case study of fluid flow over a heat exchanger, highlighting how the assumptions of incompressibility and isothermal conditions can be challenged.

   Hint

   Evaluate scenarios of highly variable temperatures or fluid composition.