MCQOPTIONS
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MCQOPTIONS
This section includes 4 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 momentum equation is \( \rho\frac{Du}{Dt}=-\frac{\partial p}{\partial x}+\frac{\partial \tau_{xx}}{\partial x}+\frac{\partial \tau_{yx}}{\partial y}+\frac{\partial \tau_{zx}}{\partial z}+\rho f_x\). Which of these statements about sign convention can be inferred from this equation? |
| A. | Pressure force is taken as negative |
| B. | Tensile force is taken as negative |
| C. | Pressure force is taken as positive |
| D. | Pressure force is unsigned |
| Answer» B. Tensile force is taken as negative | |
| 2. |
When I derived the momentum equation in x-direction, I got this equation (directly without any manipulation)\( \rho\frac{Du}{Dt}=-\frac{\partial p}{\partial x}+\frac{\partial \tau_{xx}}{\partial x}+\frac{\partial \tau_{yx}}{\partial y}+\frac{\partial \tau_{zx}}{\partial z}+\rho f_x\). Which of these models have I used? |
| A. | a) |
| B. | b) |
| C. | c) |
| D. | d) |
| Answer» C. c) | |
| 3. |
The physical property Φ of the general transport equation is replaced by ________ to get momentum equation. |
| A. | Velocity vector |
| B. | Mass |
| C. | Force vector |
| D. | Acceleration vector |
| Answer» B. Mass | |
| 4. |
Consider an element shown below. S is the source term. |
| A. | If gravitational force is the only force acting on this element. Which of these following is correct? |
| B. | Sx=mg, Sy=0, Sz=mg |
| C. | Sx=0, Sy=0, Sz=mg |
| D. | Sy=0, Sz=0, Sx=mg |
| E. | Sz=0, Sx=0, Sy=mg |
| Answer» E. Sz=0, Sx=0, Sy=mg | |