Computational Fluid Dynamics Mock Test 1

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Question 1 of 10

1. A model of fluid moving along with the flow gives non-conservative equation. What is the reason?

Position coordinates are dependent on time

Velocity is dependent on time

Position coordinates are independent on time

Velocity is independent of time

Question 1 of 10

Question 2 of 10

2. Full form of FOAM in OpenFOAM?

Flow Operation and Manipulation

Field Optimization and Manipulation

Field Operation and Manipulation

Flow Optimization and Manipulation

Question 2 of 10

Question 3 of 10

3. Which of these is a popular version of the ADI scheme?

Operator splitting

ALU algorithm

SIMPLE algorithm

Approximate factorization

Question 3 of 10

Question 4 of 10

4. If this model is used to get the governing equations, what type of equation will be obtained?

Non-conservative differential

Non-conservative integral

Conservative differential

Conservative integral

Question 4 of 10

Question 5 of 10

5. Expand divergence of velocity ∇.\(\vec{V}\) for a one-dimensional flow.

\(\frac{D\vec{V}}{Dt}\)

\(\frac{\partial u}{\partial x}+\frac{\partial v}{\partial y}+\frac{\partial w}{\partial z}\)

\(\frac{du}{dx}+\frac{dv}{dy}+\frac{dw}{dz}\)

\(\frac{\partial u}{\partial x}\)

Question 5 of 10

Question 6 of 10

6. This created a problem in modelling supersonic blunt nose.

High speed with high temperature

Supersonic Mach number

High temperatures

Change of flow equations from elliptic to hyperbolic

Question 6 of 10

Question 7 of 10

7. What is the disadvantage in predicting a complex problem with a very limited objective in CFD?

Impossible to solve

Time-consuming

Expensive

Slower

Question 7 of 10

Question 8 of 10

8. When was the first commercial CFD package released?

1981

1985

1983

1991

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Question 9 of 10

9. Over 50% of the time spent in the industry on a CFD project is devoted to the definition of the domain geometry and grid generation. Which one will be the reason for this?

More grids will give better results

To generate an optimal grid which is a compromise between desired accuracy and solution cost

To generate non-uniform grids

Calculation time is directly proportional to the number of cells

Question 9 of 10

Question 10 of 10

10. CFD can be used to ___________ the experimental results.

Convert

Interpret

Replace

Improve

Question 10 of 10