Computational Fluid Dynamics Mock Test 2

10%

Question 1 of 10

1. For inviscid flows, which is correct immediately near the wall?

\(\vec{V} = 0\)

\(\vec{V} \lt 0\)

\(\vec{V} > 0\)

\(\vec{V} ≠ 0\)

Question 1 of 10

Question 2 of 10

2. The surface integral can be used to represent ____ and ____ terms of the transport equation.

Rate of change and convection

Rate of change and diffusion

Convection and diffusion

Source and diffusion

Question 2 of 10

Question 3 of 10

3. Which of these is not an equivalent to for substantial derivative?

Material derivative

Eulerian derivative

Total derivative

Lagrangian derivative

Question 3 of 10

Question 4 of 10

4. What are the terms included in the transport equation?

Advective term, diffusive term, convective term, source term

Rate of change term, advective term, convective term, source term

Rate of change term, diffusive term, convective term, advective term

Rate of change term, diffusive term, convective term, source term

Question 4 of 10

Question 5 of 10

5. Which of these statements hold true?

Diffusive flux is always positive

Diffusive flux is always negative

Diffusive flux is positive in the direction of the positive gradient of fluid property

Diffusive flux is positive in the direction of the negative gradient of fluid property

Question 5 of 10

Question 6 of 10

6. The source term in the momentum equation is ________

Pressure force

Body forces

Viscous force

Acceleration

Question 6 of 10

Question 7 of 10

7. Consider a model of finite control volume (volume V and surface area) fixed in space with elemental volume dV, vector elemental surface area d\(\vec{S}\), density ρ and flow velocity \(\vec{V}\). What is the mass inside the control volume?

\(\frac{\partial}{\partial t} \iiint_V\rho dV\)

ρdV

\(\iint_s\rho \vec{V}.d\vec{S}\)

\(\iiint_V\rho dV\)

Question 7 of 10

Question 8 of 10

8. To which of these flows, the Euler equation is applicable?

Potential flow

Stokes Flow

Couette flow

Poiseuille’s flow

Question 8 of 10

Question 9 of 10

9. What do the two subscripts of stress tensors represent?

Directions of stress and normal to the surface on which they are acting

Direction of stress and the flow direction

Directions of stress and strain

Directions of strain and normal to the surface on which they are acting

Question 9 of 10

Question 10 of 10

10. The general transport equation is \(\frac{\partial(\rho \Phi)}{\partial t}+div(\rho \Phi \vec{u})+div(\Gamma grad \Phi)+S\). For Eulerian equations, which of the variables in the equation becomes zero?

\(\vec{u}\)

Question 10 of 10