Import Geometry for Multiphysics

[jauharr]

Hi,
I am working to create a Multiphysics coupled simulation in taichi. I request guidance on how to import the geometry. The geoblender.py example is very good but after analyzing the code I understood that the spinner is created inside the code. From my search, it came up that taichi_three supported the import.
Example problem: I want to simulate the mixing in a drum. With active geometry variations i.e. based on a particular parameter the diameter or length of drum may be varied.

Chand, R., Khaskheli, M. A., Qadir, A., Ge, B., & Shi, Q. (2012). Discrete particle simulation of radial segregation in horizontally rotating drum: Effects of drum-length and non-rotating end-plates.

I am new to the taichi language. Any support/guidance is much appreciated. Thankyou in advance.