Questions

Seite 1

CFD 1 Questions

1. What are the steps in CFD analysis?

2. What are the discretization methods? Explain them.

3. The funadamental general formula?

4. Whats W? Write the vector and the elements?

5. Whats v? Write the vector and the elements?

6. What happens to the formula when we apply Gauss integral rule?

7. What are the weak and strong conservation form? Give formulae.

8. What is a quasi-linear system of equations?

9. What is a discriminant? Classify different types of PDEs w.r.t it.

10. Describe all 3 types with domains showing as graphs

11. What is a characteristic curve? Why do we equate determinant to zero?

12. In general hyperbolic equation, what is the meaning of 'c'?

13. What would be 'c' if it is in more dimensions?

14. Explain how you get dt/dx = 1/c (or) -1/c. What does this mean?

15. Explain the stability graphs, the two conditions and the results obtained from those graphs.

16. What is CFL condition?

17. Why is it important to find the maximal eigenvalue?

18. Write the three finite difference equations. Explain their order of truncation and its meaning.

19. Which one is better? And why?

20. What are consistency, stability and convergence? Write formulae.

21. Why is central difference not good? What can be done to eliminate this problem?

22. What is artificial dissipation?

23. What is artificial viscosity?

24. What is telescoping property?

25. What are the second and fourth differences?

26. What happens in multidimensional systems?

27. What is the problem in more dimensions?