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 models is made different from its parent model by turbulent viscosity? |
| A. | Realizable k- model |
| B. | k- model |
| C. | Spalart-Allmaras model |
| D. | SST model |
| Answer» B. k- model | |
| 2. |
In the k- model, the turbulent viscosity is given as ___________ |
| A. | <sub>t</sub> k/ |
| B. | <sub>t</sub> k<sup>2</sup>/ |
| C. | <sub>t</sub>=k/ |
| D. | <sub>t</sub>=k<sup>2</sup>/ |
| Answer» C. <sub>t</sub>=k/ | |
| 3. |
Which of these is not a turbulent viscosity model? |
| A. | k- |
| B. | k- |
| C. | DNS |
| D. | SST |
| Answer» D. SST | |
| 4. |
The units of kinematic and dynamic turbulent viscosities are ___________ respectively. |
| A. | m/s<sup>2</sup> and kg m/s |
| B. | m<sup>2</sup>/s<sup>2</sup> and kg/m s |
| C. | m<sup>3</sup>/s and kg m/s |
| D. | m<sup>2</sup>/s and kg/m s |
| Answer» E. | |
| 5. |
Which of these models solves a system for the turbulent kinematic viscosity? |
| A. | DNS |
| B. | LES |
| C. | Spalart-Allmaras |
| D. | RANS |
| Answer» D. RANS | |
| 6. |
__________ relates turbulent viscosity and diffusivity. |
| A. | Reynolds number |
| B. | Reynolds analogy |
| C. | Reynolds-Averaged Navier-Stokes equations |
| D. | Favre-Averaged Navier-Stokes equations |
| Answer» C. Reynolds-Averaged Navier-Stokes equations | |
| 7. |
The dynamic turbulent viscosity is ___________ |
| A. | equal to the product of turbulent length and time scales |
| B. | proportional to the product of turbulent length and time scales |
| C. | proportional to the product of kinematic turbulent viscosity and density of the fluid |
| D. | equal to the product of kinematic turbulent viscosity and density of the fluid |
| Answer» E. | |
| 8. |
The kinematic turbulent viscosity is __________ |
| A. | equal to the product of turbulent length and time scales |
| B. | equal to the product of turbulent length and velocity scales |
| C. | proportional to the product of turbulent length and velocity scales |
| D. | proportional to the product of turbulent length and time scales |
| Answer» D. proportional to the product of turbulent length and time scales | |
| 9. |
Which of these scientists introduced turbulent viscosity? |
| A. | Kolmogorov |
| B. | Smagorinsky |
| C. | Prandtl |
| D. | Boussinesq |
| Answer» E. | |
| 10. |
The value of turbulent viscosity is fairly close to that of __________ |
| A. | Turbulent diffusivity |
| B. | Newton s viscosity |
| C. | Kinematic viscosity |
| D. | Dynamic viscosity |
| Answer» B. Newton s viscosity | |