MEMOS 3D modelling of ELM-induced transient melt damage on an inclined tungsten surface in the ASDEX Upgrade outer divertor

•First heat transfer and hydrodynamic simulations of transient melting of an inclined W sample.•Post-mortem melt displacement adequately reproduced with the shallow water approximation.•Motion dominated by the J × B force but also affected by thermo-capillary flows, viscous damping.•Final surface deformation profile strongly depends on the treatment of the spatially varying B-field inclination.