Computational Fluid Dynamics Mock Test 10

10%

Question 1 of 10

1. The bulk viscosity term in the compressible flows are discretized as ___________

summation of fluxes over the faces

product of bulk viscosity and volume at the cell centre

summation of bulk viscosity and area at the faces

product of bulk viscosity and area at the faces

Question 1 of 10

Question 2 of 10

2. When the source term varies highly, which of these properties is affected?

Rate of convergence

Stability

Boundedness

Consistency

Question 2 of 10

Question 3 of 10

3. The guessed velocities will satisfy the continuity equation when ___________

the pressure correction is correct

the velocity correction is correct

the pressure-correction equation satisfies the continuity equation

the pressure field is correct

Question 3 of 10

Question 4 of 10

4. How many predictor and corrector steps does the PISO algorithm involve?

Two predictor and one corrector steps

Two predictor and two corrector steps

One predictor and one corrector steps

One predictor and two corrector steps

Question 4 of 10

Question 5 of 10

5. When the source term does not vary much, the source term is ___________

calculated form the current values

solved simultaneously

implicitly calculated

calculated from the previous iteration’s values

Question 5 of 10

Question 6 of 10

6. The two-level predictor-corrector method is __________

second-order accurate

first-order accurate

third-order accurate

fourth-order accurate

Question 6 of 10

Question 7 of 10

7. Which of these time-steps are used to approximate the value at time-step t-\(\frac{\Delta t}{2}\) using the Crank-Nicolson scheme for finite volume approach?

t and t+Δ t

t and t+\(\frac{\Delta t}{2}\)

t and t-\(\frac{\Delta t}{2}\)

t and t-Δ t

Question 7 of 10

Question 8 of 10

8. The PISO algorithm for the transient problem is _________

never converging

iterative

fast converging

non-iterative

Question 8 of 10

Question 9 of 10

9. For which kind of problems are the two-level methods used?

Spatial integrations

Temporal initial value problems in integration

Spatial problems in ODEs

Temporal initial value problems in ODEs

Question 9 of 10

Question 10 of 10

10. The Adam-Bashforth method is ____________

an implicit method

a first-order accurate method

an explicit method

a second-order accurate method

Question 10 of 10