Reply To: How to create 2D triangle ？

[Fany]

Good, thanks. I will try to increase the resolution. But I found the resolution in the examples of OpenLB library seemed to be usually set at 10-35. In my case, the resolution was set at 10 (same with that in rayleiBenard2d case).
By the way, the inclined rectangle above was just obtained by rotating the rectangle of rayleiBenard2d case (OpenLB) for 45°. The blue area above should be the unnecessary part outside of the rectangle?