OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › General Topics › Heat transfer liquid-solid and heat conduction in solids › Reply To: Heat transfer liquid-solid and heat conduction in solids July 21, 2023 at 2:19 pm #7644 FBukreevKeymaster Dear Jijo, you can also try to write your own Coupler like one of navierStokesAdvectionDiffusionCoupling.h. They also run parallelly. But I think the problem is still somewhere in the config. Best regards, Fedor