Graetz Problem with a Fixed Wall Temperature

Example 6.3. Graetz Problem with a Fixed Wall Temperature 

As an aside, it is worth mentioning, that the technique described earlier can also be used for solving partial differential equations in cylindrical coordinates. For example, consider the Graetz problem, [1] 

Schiesser and Silebi (1997)[1] solved this problem using the numerical method of lines by adding a time derivative for u and waiting for the steady state. However, 

For this example, Digits has to be set to 30 for accurate predictions. The boundary conditions are entered as  

6 Method of Lines for Elliptic Partial Differential Equations 

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