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Partial Differential Equations

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Presentation on theme: "Partial Differential Equations"— Presentation transcript:

1 Partial Differential Equations
Chapter 12 Burden and Faires 11/18/2018 PDE's

2 General 2nd Order Form 11/18/2018 PDE's

3 Discriminant 11/18/2018 PDE's

4 Classification 11/18/2018 PDE's

5 Conic Sections 11/18/2018 PDE's

6 Classification 11/18/2018 PDE's

7 Elliptical PDE 11/18/2018 PDE's

8 Elliptical PDE 11/18/2018 PDE's

9 FDM Molecule 11/18/2018 PDE's

10 ODE Second Order Formula
xi-1 xi xi+1 11/18/2018 PDE's

11 ODE Second Order Central Difference Formulas
11/18/2018 PDE's

12 ODE Second Order Central Difference Formulas
11/18/2018 PDE's

13 PDE Second Order Central Difference Formulas
11/18/2018 PDE's

14 PDE Second Order Central Difference Formulas
11/18/2018 PDE's

15 Example Problem Consider a square plate 0.5 m on a side. Two sides are held at 0o and two sides vary from 0 to 100o Find the steady state temperature. 11/18/2018 PDE's

16 Boundary Conditions 11/18/2018 PDE's

17 Mesh 4 3 2 1 j = 0 i = 11/18/2018 PDE's

18 Mesh y4 y3 y2 y1 y0 x0 x x x x4 11/18/2018 PDE's

19 Mesh y4 y3 y2 y1 y0 x0 x x x x4 11/18/2018 PDE's

20 Notation 11/18/2018 PDE's

21 PDE Second Order Central Difference Formulas
11/18/2018 PDE's

22 PDE Second Order Central Difference Formulas
11/18/2018 PDE's

23 Equations: 11/18/2018 PDE's

24 11/18/2018 PDE's

25 Solution of Equations For smaller systems use a direct method.
Gaussian Elimination Matrix Factorization For larger systems use an iterative method. Gauss-Seidel Successive Over Relaxation 11/18/2018 PDE's

26 Symmetric Block Tridiagonal Matrix Form
11/18/2018 PDE's

27 Symmetric Block Tridiagonal Matrix Form
11/18/2018 PDE's

28 Theorem 11/18/2018 PDE's

29 Matrix Form 11/18/2018 PDE's

30 Matrix Form 11/18/2018 PDE's

31 Poisson’s Equation Problem
11/18/2018 PDE's

32 PDE Second Order Central Difference Formulas
11/18/2018 PDE's

33 PDE Second Order Central Difference Formulas
11/18/2018 PDE's

34 Alternative Notation N W E S 11/18/2018 PDE's

35 Other Topics Alternative Solution Techniques. Derivative B.C.
Nonuniform Boundaries. Alternative Coordinate systems. 11/18/2018 PDE's

36 Alternative Solution Procedure
11/18/2018 PDE's

37 Alternating Direct Implicit Method
11/18/2018 PDE's

38 Alternating Direct Implicit Method
11/18/2018 PDE's

39 Example 12 12 11/18/2018 PDE's

40 Example 11/18/2018 PDE's

41 Equations 11/18/2018 PDE's

42 Gauss Elimination 11/18/2018 PDE's

43 Gauss-Seidel 11/18/2018 PDE's

44 11/18/2018 PDE's

45 Alternating Direct Implicit Method - Rows
11/18/2018 PDE's

46 Alternating Direct Implicit Method - Columns
11/18/2018 PDE's

47 Derivative B.C. Function value specified on boundary are called Dirichlet B.C. Derivative values specified on boundary are called Neumann Boundary Conditions 11/18/2018 PDE's

48 Example: 11/18/2018 PDE's

49 Example 11/18/2018 PDE's

50 Example 11/18/2018 PDE's

51 Example 11/18/2018 PDE's

52 Pseudo-Nodes 11/18/2018 PDE's

53 Equations 4 equations in 6 unknowns. 11/18/2018 PDE's

54 Derivative B.C 11/18/2018 PDE's

55 Derivative B.C 11/18/2018 PDE's

56 Irregular Boundary 11/18/2018 PDE's

57 FDM Molecule 11/18/2018 PDE's

58 Taylor Series 11/18/2018 PDE's

59 FDM 11/18/2018 PDE's

60 FDM 11/18/2018 PDE's

61 FDM 11/18/2018 PDE's

62 FDM 11/18/2018 PDE's

63 FDM 11/18/2018 PDE's

64 FDM 11/18/2018 PDE's

65 FDM 11/18/2018 PDE's

66 FDM 11/18/2018 PDE's


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