BMKU 4633 QUIZ CHAPTER 1

What is the disadvantage in predicting a complex problem with a very limited objective in CFD?

• Time-consuming

• Impossible to solve

• Slower

• Expensive

What is the advantage of numerical methods over analytical method?

• Speed

• Cost

• Flexibility

• Time

Why ideal conditions should be simulated in CFD?

• Experimental analysis is impossible for ideal conditions

• Experimental set-up will have imperfections

• Experimental set-up will lead to wrong solutions

• Experimental analysis can be done for ideal cases

A teacher wants to show the effects of turbulence over an aircraft to the students. What is the best way to simulate it?

• Wind tunnel with analytical backup

• Wind tunnel with CFD backup

• Flow visualization in wind tunnel

• Turbulence modelling and animation using CFD tools

For optimization of designs, CFD is ___________

• Slow and expensive

• Cost-effective but slow

• Fast but expensive

• Cost-effective and fast

CFD is the third approach for fluid flow analysis. What are the other two approaches?

• Theoretical and experimental

• Physical and Mathematical

• Numerical and experimental

• Experimental and physical

Which among the following is a reason why we do not completely rely upon ground tests for analysing fluid dynamics?

• Three-dimensional flows cannot be analysed

• Facilities do not exist in all fight regimes

• The output generated is not as accurate as theoretical analysis

• Long run-time

Which of the following is not true about CFD?

• There will be a need for theory and experiments

• CFD is an equal partner of theoretical and experimental analyses

• CFD will complement theoretical and experimental Fluid Dynamics

• CFD will replace the approaches of pure theory and pure experiments

CFD analyses Fluid Dynamics using this method.

• Analytical

• Physical

• Numerical

• Experimental

CFD provides results of ____________

• Continuous time varying results at discrete locations

• Discrete points of space and time

• Continuous spatial results at discrete time points

• Continuous in time and space