Shape with inner and outer radius

[AsimAl-Sofi]

hi I would like to use the package to calculate the underground cable heat distribution. However, I was not able to build the cable layers, i.e., how to create a shape with inner and outer radius? Is that possible?

[djsilva99]

Hello

As far as I understand, you can change the material in two stages. Let's say that the 2D object is made of material_1. Then you can define the outer radius:

>>> example.change_material(
...     material='material_2',
...     shape='circle',
...     initial_point=(5, 5),
...     length=5
... )

and then the inner radius:

>>> example.change_material(
...     material='material_1',
...     shape='circle',
...     initial_point=(5, 5),
...     length=2
... )

This gives you a shell of thickness = 3.

[AsimAl-Sofi]

Thanks for the explanation In the tutorial on the site, the circle does not look smooth. Is it also possible to increase the resolution of the added shapes?

[djsilva99]

Yes. When you instantiate a SingleObject2D you define the size attribute. There, you can increase it, e.g., from the default value of (10, 10) to (100, 100). However, note that:

• you need to redefine some input values, such as dx, dy (reduce to keep the size) and dt (so that the solution can converge), and the corresponding parameters length and initial_point from the above change_material method.
• the size will impact the computation performance.

[AsimAl-Sofi]

Thank you for your explanation