The effect of multi-scale laser textured surface on lubrication regime

► The effect of multi-scale laser textured surface on lubrication regime was studied. ► A novel multi-scale dimples were fabricated by LST by combining circles and ellipses. ► The beneficial effect of multi-scale dimples becomes higher with increasing dimple depth and sliding speed. ► The multi-scale texture dimples have important hydrodynamic lubrication effect.