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 › Lattice Boltzmann Methods › General Topics › refined grid with periodic boundary › Re: refined grid with periodic boundary November 10, 2018 at 11:09 am #2958 mathiasKeymaster Dear mfduqued, That is the OpenLB forum. Palabos question I cannot answer! Best Mathias