MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Which of these is an advantage of the k- model over the k- model? |
| A. | Does not depend on the value |
| B. | Easier to integrate |
| C. | Can be applied for turbulent boundary layers |
| D. | Has only two extra equations |
| Answer» C. Can be applied for turbulent boundary layers | |
| 2. |
Using k- model is difficult for ____________ |
| A. | free stream |
| B. | boundary layer flows |
| C. | jet flows |
| D. | mixing layer flows |
| Answer» B. boundary layer flows | |
| 3. |
The values of k and must be specified in ___________ |
| A. | the inlet boundary conditions |
| B. | the outlet boundary conditions |
| C. | the wall boundary conditions |
| D. | the symmetry boundary conditions |
| Answer» B. the outlet boundary conditions | |
| 4. |
Represent the turbulent dynamic viscosity in terms of k and . |
| A. | /k |
| B. | k/ |
| C. | k<sup>2</sup>/ |
| D. | /k<sup>2</sup> |
| Answer» C. k<sup>2</sup>/ | |
| 5. |
Represent the length scale in terms of k and . |
| A. | /k |
| B. | k/ |
| C. | k/ |
| D. | / k |
| Answer» D. / k | |
| 6. |
What is the unit of turbulence frequency? |
| A. | Turbulence frequency is dimensionless |
| B. | 1/s<sup>2</sup> |
| C. | s |
| D. | 1/s |
| Answer» E. | |
| 7. |
If k is the turbulent kinetic energy, what is the relationship between the turbulence frequency ( ) and dissipation rate of the turbulent kinetic energy ( )? |
| A. | = /k |
| B. | =k/ |
| C. | = <sup>2</sup>/k |
| D. | =k<sup>2</sup>/ |
| Answer» B. =k/ | |
| 8. |
Which of these could not be modelled using the k- model, but can be modelled using the k- model? |
| A. | Turbulent jet flows |
| B. | Adverse pressure gradients in turbulent flows |
| C. | Boundary layer on turbulent flows |
| D. | Turbulent free flows |
| Answer» C. Boundary layer on turbulent flows | |
| 9. |
What does the variable in the k- model stand for? |
| A. | Turbulence eddy size |
| B. | Turbulence eddy wavelength |
| C. | Turbulence frequency |
| D. | Turbulence large length scale |
| Answer» D. Turbulence large length scale | |
| 10. |
The k- model adds ___________ to the RANS equations. |
| A. | three variables |
| B. | three equations |
| C. | two variables |
| D. | two equations |
| Answer» E. | |