(a) (i) Write down the finite difference equation corresponding to the three-dimensional partial differential equatioin d²ud²u d²u + + +u+xyz = 0 дх2 дуг дz2 at the grid point (x, yj, zk) of a rectangular mesh with Ax = Ay=Az = h. Denote u (xi, yj, zk) by Ui,j,k. (ii) Re-write the difference equation in (i) into an iteration formula appropriate for Liebmann's method. Use the superscripts uk, uk+1 to show how new values are computed from previous ones.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
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Chapter3: Functions And Graphs
Section3.3: Lines
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Please solve question 5 (a) 

QUESTION 5
(a)
(i) Write down the finite difference equation corresponding to the three-dimensional partial differential equatioin
d²u du d²u
+ + +u+xyz = 0
дх2 т дуг
dz²
at the grid point (xi, yj, zk) of a rectangular mesh with Ax=Ay=Az = h. Denote u(xi, yj, Zk) by Ui,j,k.
(ii) Re-write the difference equation in (i) into an iteration formula appropriate for Liebmann's method. Use the
superscripts uk, uk+1 to show how new values are computed from previous ones.
(b) The equation
№²ud²u
+
dx² dy²
=0
is to be solved in a rectangular region. The grid (with Ax= Ay = 1), the boundary values and the numbering of the
node points are indicated in the sketch below.
Transcribed Image Text:QUESTION 5 (a) (i) Write down the finite difference equation corresponding to the three-dimensional partial differential equatioin d²u du d²u + + +u+xyz = 0 дх2 т дуг dz² at the grid point (xi, yj, zk) of a rectangular mesh with Ax=Ay=Az = h. Denote u(xi, yj, Zk) by Ui,j,k. (ii) Re-write the difference equation in (i) into an iteration formula appropriate for Liebmann's method. Use the superscripts uk, uk+1 to show how new values are computed from previous ones. (b) The equation №²ud²u + dx² dy² =0 is to be solved in a rectangular region. The grid (with Ax= Ay = 1), the boundary values and the numbering of the node points are indicated in the sketch below.
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