Due to recent bot attacks we have changed the sign-up process. If you want to participate in our forum please send a message via our contact form. › Forums › OpenLB › General Topics › importing stl geometry files (cylinder3d) › Re: importing stl geometry files (cylinder3d) October 4, 2018 at 1:31 pm #2945 behnamandiParticipant sorry. im not sure what you mean by primitives