Problem solving partial differential equation

Questions
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1

Hello, I have a problem solving the heat equation with NDSolve in zylindrical coordinates.
Can anyone tell me what I have done wrong?

Thanks in advance and best regards
Dirk

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2

What is the probem? The code runs fine on my system.

3

No problem running it on my system.

4

Hello, I am using Version 11.3.0.0 and my code does not show the temperature distribution.
What Software versions are you using?

Dirk

5

Hello, I am using Version 11.3.0.0 and my code does not show the temperature distribution. What Software versions are you using?

Dirk

6

I am using 14

7

The error messages suggest that there may be a problem with ToElementMesh in one of the following:

Needs["NDSolve`FEM`"];

ToElementMesh[\[CapitalOmega]]

ToElementMesh[NumericalRegion[\[CapitalOmega]]]

I can’t check V11.3.0.0, but you might see if either produces an element mesh for you. If neither does, then that may indicate where the problem is.

Alternatively, you could try coding the region Ω as a Rectangle[] or a Polygon[] instead of as an ImplicitRegion[].

That it is working in later versions suggests it might be that there was a bug which has been fixed.

8

Hi Michael,

thanks for your advice.
Rectangle[] instead of ImplicitRegion[] works..

Kind regards
Dirk