Question

Bernoullis equation cannot be applied when the flow is

Answer 1

Answer:

No, the Bernoulli's equation cannot be directly applied to viscous flow because in viscous flow, the motion of the fluid particle is constant. ... Explanation: Bernoulli's principle states that increasing the velocity decreases the pressure which gives us a higher lift.

Answer 2

The Bernoulli's equation cannot be applied in the following conditions given below:

(i) when the flow is turbulent or unsteady.

(ii) when the fluid is compressible or viscous.

- The main assumptions in forming Bernoulli's equation are as follows:

(a) the flow of fluid must be streamlined and steady.

(b) the fluid must be incompressible.

- So, if the flow is turbulent and unsteady and the fluid is compressible, then Bernoulli's equation will not be applicable.