OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Geometry creation › Reply To: Geometry creation December 1, 2021 at 3:16 pm #6206 AdrianKeymaster This basic approach also works in 3D. See e.g. turbulence/venturi3d for an example (XML is used there to describe the indicators but this is optional)