Once again, it is important to know the assumptions underlying the equations that we use.

Question

What did we assume when deriving the isentropic flow equations?

q=0

No frictional effects

No dissipative effects

All of the above

None of the above

Answer 1

When deriving the isentropic flow equations, the common assumptions made include:

1. q=0: This implies that there is no heat transfer to or from the fluid, meaning the process is adiabatic.

2. No frictional effects: This means that the flow is assumed to be inviscid, or frictionless, which allows us to neglect viscous effects that can cause energy losses.

3. No dissipative effects: This further reinforces the idea that there are no losses due to non-conservative forces (like friction or turbulence).

Given these points, the correct answer to your question is:

All of the above.

These assumptions are critical for the simplifications in deriving the isentropic flow equations, which describe idealized flows without energy loss.