Topic: Fluid Mechanics
Examine the following statements: (i) Euler's equation is applicable to inviscid liquid (ii) Bernoulli's equation applicable to steady state (iii) Viscous forces are not considered in Navier Stokes equation (iv) Surface tension and compressibility forces are considered in Navier Stokes equation
- A. Statements (i) and (ii) are not correct
- B. Statements (iii) and (iv) are correct
- C. Statements (i), (ii) and (iii) are correct
- D. All the statements are correct
Explanation: Statement (i) is correct: Euler's equation assumes zero viscosity. Statement (ii) is correct: Bernoulli's equation is derived for steady flow. Statement (iii) is incorrect: Navier-Stokes equations explicitly consider viscous forces. Statement (iv) is generally incorrect as standard NS equations focus on gravity, pressure, and viscous forces, not surface tension. None of the provided options accurately reflect that ONLY (i) and (ii) are correct.