Computational Fluid Dynamics Practice Test 9

1. Which of these is correct about the FROMM scheme?

A linear profile is obtained between the far upwind and the far downwind nodes

A linear profile is obtained between the far upwind and the immediate downwind nodes

A linear profile is obtained between the immediate upwind and the far downwind nodes

A linear profile is obtained between the far upwind and the immediate upwind nodes

2. Which of these statements is correct when using the staggered grids?

No interpolation is needed to find the pressure gradient in the continuity equation

No interpolation is needed to find the pressure gradient in the momentum equation

Interpolation is enough to find the pressure gradient in the momentum equation

Interpolation is enough to find the pressure gradient in the continuity equation

3. For incompressible flows with no body forces, the volume integral term is ____________

body forces

flux terms

pressure forces

viscous terms

4. The coefficients of the equation formed in the Rhie-Chow interpolation is obtained using ___________

Rhie-Chow interpolation

Weighted average

Linear interpolation

Quadratic interpolation

5. In which of these ranges is the central differencing scheme used?

-0.5≤Pe≤0.5

-2≤Pe≤2

-1≤Pe≤1

-5≤Pe≤5

6. Which of these is correct about the SIMPLER algorithm?

Velocity is obtained using the pressure values and the momentum equation

Prediction-correction is used for the velocity field

Velocity is obtained without any correction

Velocity is obtained using the pressure values and the continuity equation

7. The momentum equation drives the correction field of __________

pressure

density

temperature

energy

8. What is the first term of the truncation error of the QUICK scheme?

\(\frac{1}{16} (\Delta x)^3 \phi_C^{iv}\)

\(\frac{1}{16} (\Delta x)^2 \phi_C'''\)

\(\frac{1}{16} (\Delta x)^2 \phi_C^{iv}\)

\(\frac{1}{16} (\Delta x)^3 \phi_C'''\)

9. According to the explicit time-advanced method for getting pressure, which of these is correct?

Momentum conservation is enforced at the previous step after starting to solve the current step

Momentum equation is enforced at each step before moving to the next step

Continuity is enforced at the previous step after starting to solve the current step

Continuity is enforced before at each step moving to the next step

10. What is the order of accuracy of the hybrid differencing scheme?

First-order

Fourth-order

Second-order

Third-order