Use the Prescribed Deformation node to define the deformation explicitly using expressions, or if you want the spatial coordinates to follow a deformation computed by, for example, a Solid Mechanics interface. (You can also achieve the latter effect by excluding the domains where the Solid Mechanics interface is defined from the domains where the Moving Mesh interface is active.)

Specify expressions that define the deformation in the Prescribed mesh displacement fields (dx, dy, and dz for 3D models, for example) (SI unit: m). The default gives no mesh displacement.