MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Computational Fluid Dynamics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The value of y+ at the intersection between the linear profile and log-law is ___________ |
| A. | 20 |
| B. | 5 |
| C. | 30 |
| D. | 11.63 |
| Answer» E. | |
| 2. |
The value of y+ is 50. Which layer does it belong to? |
| A. | Inertia dominated layer |
| B. | Velocity defect layer |
| C. | Log-law layer |
| D. | Law of the wake layer |
| Answer» D. Law of the wake layer | |
| 3. |
What is the range of y+ in the buffer layer? |
| A. | 0 < y+ < 5 |
| B. | 5 < y+ < 30 |
| C. | 30 < y+ < 500 |
| D. | 10 < y+ < 20 |
| Answer» C. 30 < y+ < 500 | |
| 4. |
What is the unit of y+? |
| A. | y+ is dimensionless |
| B. | m |
| C. | m2 |
| D. | 1⁄m |
| Answer» B. m | |
| 5. |
Let y be the distance from the wall, ut be the shear velocity and ν be the kinematic viscosity. Which of these equations define y+? |
| A. | y+=y/utν |
| B. | y+=utν/y |
| C. | y+=(y ut)/ν |
| D. | y+=ut/yν |
| Answer» D. y+=ut/yν | |
| 6. |
The concept of y+ is not used in which of these laws? |
| A. | Law of the wall |
| B. | Law of the wake |
| C. | Log law |
| D. | Linear law |
| Answer» C. Log law | |
| 7. |
The value of y+ is used while finding ___________ |
| A. | eddy kinematic viscosity for the turbulent boundary layers |
| B. | mixing length for the turbulent boundary layers |
| C. | eddy dynamic viscosity for the turbulent boundary layers |
| D. | kinetic energy for the turbulent boundary layers |
| Answer» C. eddy dynamic viscosity for the turbulent boundary layers | |
| 8. |
The value y+ is important only when we deal with ___________ |
| A. | turbulent boundary layers |
| B. | turbulent jets |
| C. | free turbulent mixing layers |
| D. | turbulent wakes |
| Answer» B. turbulent jets | |