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 › Implementing the Cumulant Collision Operator › Reply To: Implementing the Cumulant Collision Operator August 19, 2025 at 10:07 pm #10672 FBukreevKeymaster In the last release these functors are not used in general, check the actual release.