Explore topic-wise MCQs in Computational Fluid Dynamics.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Computational Fluid Dynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

I am using forward differences in the predictor step. Which method would you suggest me to use in the corrector step?

A. Rearward differences
B. Central differences
C. Forward differences
D. Second-order differences
Answer» B. Central differences
Discussion
2.

Which of these values used to find (( frac{ partial rho}{ partial t})_{i,j}^{av} ) is a predicted one?

A. (( frac{ partial rho}{ partial t})_{i,j}^t )
B. Neither (( frac{ partial rho}{ partial t})_{i,j}^t nor ( frac{ partial rho}{ partial t})_{i,j}^{t+ Delta t} )
C. (( frac{ partial rho}{ partial t})_{i,j}^{t+ Delta t} )
D. Both (( frac{ partial rho}{ partial t})_{i,j}^t and ( frac{ partial rho}{ partial t})_{i,j}^{t+ Delta t} )
Answer» D. Both (( frac{ partial rho}{ partial t})_{i,j}^t and ( frac{ partial rho}{ partial t})_{i,j}^{t+ Delta t} )
Discussion
3.

Which value is predicted in the predictor step of the MacCormack s technique?

A. Variable at the average time-step
B. Variable at the upcoming time-step
C. Time derivative of the variable at the upcoming time-step
D. Time derivative of the variable at the average time-step
Answer» C. Time derivative of the variable at the upcoming time-step
Discussion
4.

How is the value (( frac{ partial rho}{ partial t})_{i,j}^{av} ) obtained in the MacCormack s expansion to find ( rho_{i,j}^{t+ Delta t} )?

A. Truncated mean of (( frac{ partial rho}{ partial t})_{i,j}^t and ( frac{ partial rho}{ partial t})_{i,j}^{t+ Delta t} )
B. Weighted average of (( frac{ partial rho}{ partial t})_{i,j}^t and ( frac{ partial rho}{ partial t})_{i,j}^{t+ Delta t} )
C. Geometric mean of (( frac{ partial rho}{ partial t})_{i,j}^t and ( frac{ partial rho}{ partial t})_{i,j}^{t+ Delta t} )
D. Arithmetic mean of (( frac{ partial rho}{ partial t})_{i,j}^t and ( frac{ partial rho}{ partial t})_{i,j}^{t+ Delta t} )
Answer» E.
Discussion
5.

Which of these methods is used for finding the average time derivative in MacCormack s technique?

A. Trial and error method
B. Predictor-corrector method
C. Genetic algorithm
D. Relaxation method
Answer» C. Genetic algorithm
Discussion
6.

Which of these terms of the Taylor series expansion is used in the MacCormack s technique?

A. ( t)<sup>1</sup> and ( t)<sup>2</sup>
B. ( t)<sup>1</sup>
C. ( t)<sup>0</sup> and ( t)<sup>1</sup>
D. ( t)<sup>0</sup>
Answer» D. ( t)<sup>0</sup>
Discussion
7.

What is the order of accuracy of the MacCormack s technique?

A. Fourth-order
B. Third-order
C. First-order
D. Second-order
Answer» E.
Discussion
8.

Which series expansion is used by the MacCormack s technique?

A. Taylor Series
B. Fourier series
C. McLaurin series
D. Laurent series
Answer» B. Fourier series
Discussion
9.

MacCormack s technique is __________

A. explicit, finite-difference method
B. implicit, finite-difference method
C. explicit, finite volume method
D. implicit, finite volume method
Answer» B. implicit, finite-difference method
Discussion