Computational Fluid Dynamics Mock Test 3

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Question 1 of 10

1. The speed of propagation of the disturbance in hyperbolic problems is ____________

infinite

finite

Question 1 of 10

Question 2 of 10

2. The flow variables for a/ an _____________ should be solved simultaneously with the flow variables at all other points in the domain.

Hyperbolic flow

Parabolic flow

Elliptic flow

Mixed flow

Question 2 of 10

Question 3 of 10

3. Which of these statements is wrong?

Convergence is affected by accuracy and efficiency

Converged solutions do not vary much with further iterations

Converged solutions are exact

Convergence is applicable for iteration processes

Question 3 of 10

Question 4 of 10

4. When can we say that a problem is suitable to be solved using CFD?

The PDE has no solution

The PDE has more than one solution

The solution to PDE is unique and independent of the initial and boundary conditions

The solution to PDE is unique and it depends continuously on the initial and boundary conditions

Question 4 of 10

Question 5 of 10

5. In real, how is convergence defined?

When the variation is the same as the result

When the variation is less than the result

When the variation falls below a certain acceptable range

Variations are accepted

Question 5 of 10

Question 6 of 10

6. In which of these methods, the differential equation is multiplied by a test function?

Spectral element method

Finite difference method

Finite element method

Finite volume method

Question 6 of 10

Question 7 of 10

7. The characteristic curves for an elliptic system are ___________

both imaginary

real and imaginary

both real

both zeros

Question 7 of 10

Question 8 of 10

8. Which of these equations are used to classify PDEs?

\((\frac{dy}{dx})^2-(\frac{dy}{dx})+1=0\)

\(b(\frac{dy}{dx})-c=0\)

\(a(\frac{dy}{dx})^2-b(\frac{dy}{dx})=0\)

\(a(\frac{dy}{dx})^2-b(\frac{dy}{dx})+c=0\)

Question 8 of 10

Question 9 of 10

9. Which of these is used to analyse the stability of a system?

Von Neumann’s method

Peclet number

Nusselt number

Courant number

Question 9 of 10

Question 10 of 10

10. What is the difficulty in modelling supersonic blunt body problem?

Mixed flow behaviour

A PDE cannot be formed

The PDE cannot be solved

Boundary conditions cannot be formed

Question 10 of 10