MEC302 CFD 23/24

What is the physical meaning of the convective derivative?

The time rate of change due to the movement of the fluid element from one location to another in the flow field where the flow properties are spatially different.

a

In a fully developed flow within a straight channel with its axis along the x direction, which of the following term is negligible?

du/dx

b

What is u+?

The ratio of velocity parallel to the wall to the friction velocity.

The terms in the momentum equations accounting for turbulence effects contain ____________

Reynolds stresses

Which of these scientists introduced turbulent viscosity?

Boussinesq

The kinematic turbulent viscosity is __________

proportional to the product of turbulent length and velocity scales

b

Which of the following model is not an eddy viscosity turbulence model

c

Wall function can be used when the first node satisfies ___________.

c) 30 < y+ < 300

Which of these properties is not ensured in Finite Difference Methods?

Conservativeness.

c

The numerical convection schemes should be _________

upwind biased

c

b

The pressure correction equation is used to ensure _________.

mass conservation

c

b

a