MCQOPTIONS
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MCQOPTIONS
This section includes 7 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 methods is used to treat the non-orthogonal diffusion term? |
| A. | Deferred correction |
| B. | Predictor–corrector |
| C. | Green-gauss |
| D. | Trial and error method |
| Answer» B. Predictor–corrector | |
| 2. |
What is the relationship between \(\vec{E_f} \,and\, \vec{S_f}\) using the over-relaxed approach? |
| A. | \(\vec{E_f}=(\vec{S_f} ).\vec{e}\) |
| B. | \(\vec{E_f}=(\frac{S_f}{cos \theta}) \vec{e}\) |
| C. | \(\vec{E_f}=(\vec{S_f})×\vec{e}\) |
| D. | \(\vec{E_f}=((\vec{S_f}).\vec{e} ) \vec{e}\) |
| Answer» C. \(\vec{E_f}=(\vec{S_f})×\vec{e}\) | |
| 3. |
In the orthogonal correction approach, the relationship between \(\vec{E_f}\, and\, \vec{S_f}\) is ________ |
| A. | \(\vec{E_f}=\vec{S_f}×\vec{e}\) |
| B. | \(\vec{E_f}=S_f cos\theta\vec{e}\) |
| C. | \(\vec{E_f}=S_f\vec{e}\) |
| D. | \(\vec{E_f}=\vec{S_f}.\vec{e}\) |
| Answer» D. \(\vec{E_f}=\vec{S_f}.\vec{e}\) | |
| 4. |
Which of these is correct regarding the minimum correction approach? |
| A. | The non-orthogonal correction is kept as small as possible |
| B. | The non-orthogonal correction is kept as large as possible |
| C. | The surface vector is kept as small as possible |
| D. | The surface vector is kept as large as possible |
| Answer» B. The non-orthogonal correction is kept as large as possible | |
| 5. |
In the minimum correction approach of decomposing the surface vector of a non-orthogonal grid, the relationship between the vector connecting the owner and the neighbour node \((\vec{E_f})\) and the surface vector \((\vec{S_f})\) is given as _________a) \(\vec{S_f} sin\theta.\vec{e}\) b) \(\vec{S_f} cos\theta.\vec{e}\) c) \((S_f cos\theta) \vec{e}\) d) \((S_f sin\thet |
| A. | \(\vec{S_f} sin\theta.\vec{e}\) |
| B. | \(\vec{S_f} cos\theta.\vec{e}\) |
| C. | \((S_f cos\theta) \vec{e}\) |
| D. | \((S_f sin\theta) \vec{e}\) |
| Answer» D. \((S_f sin\theta) \vec{e}\) | |
| 6. |
Non-orthogonality leads to ________ in diffusion problems. |
| A. | cubic-diffusion |
| B. | less-diffusion |
| C. | additional-diffusion |
| D. | cross-diffusion |
| Answer» E. | |
| 7. |
Non-orthogonality creates a problem in _________ of the steady-state diffusion equation. |
| A. | the neighbouring terms |
| B. | the source term |
| C. | the direction of the surface vector |
| D. | the magnitude of the surface vector |
| Answer» D. the magnitude of the surface vector | |