Question

Which of the following is NOT an assumption of Bernoulli’s equation?

1. Flow is steady
2. Flow is ideal
3. Flow is irrotational
4. Flow is compressible

Answer 1

Correct Answer - Option 4 : Flow is compressible

Explanation:

The following assumption is made in deriving Bernoulli’s equation

1. Flow is steady
2. Fluid is incompressible
3. Fluid is non-viscous (inviscid)
4. The equation is applicable along a streamline
5. Effect of friction is neglected
6. Only pressure and gravity forces are taken into account
7. Velocity is uniform over the cross-section

Note:

Bernoulli Equation is given by,

\(\frac{P}{\rho g} + \frac{{{v^2}}}{{2g}} + Z = Constant\)