Fluids promblem need help with these multiple choice promblems 18. DV/Dt is a) a

Question

Fluids promblem need help with these multiple choice promblems 18. DV/Dt is a) always b) nover c) sometimes d) less than e) greater than zero for a steady, incompressible flow condition. 19. The information to be gained by solving the incompressible continuity equation and the ful Navier-Stokes equations is a) a specification of the velocity field b) a specification of the pressure distribution. c) both (a) and (b). d) a specification of the velocity, pressure, and density distributions o) a specification of the velocity, pressure, density, and tomperature distributions 20. In a steady, 2-D, fully-developed, laminar flow, the following term(s) in the dimensionless Navier-Stokes equations is (are) negligible: a) DV/D c) (v.Vv. Re 21. The convective acceleration term of the Euler's equation in vector form is a) (v.V)v b) v(V/2). c) v.vv c) (V.V)V e) DVIDt

Explanation / Answer

18. change in volume with time is always zero in case of incompressible fluid. so, option a is correct.

19. navier stroke's equation and the continuity equations gives the specification of velocity, pressure and the density distributions.

20. option d is correct.

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