[tmy]

Hi all,

I am struggling with the udf to define a boundary movement. Attached is my code in "user_motion.c". What I want to do is set the boundary 1 with a constant moving velocity along x axis. However, after compiling the code and running simulation, I found the boundary was still stationary. Could anyone tell me how to fix it? Or is there any relevant tutorial about how to set user_defined_function of boundary movement? I would really appreciate for your help!

ps: in my code, I directly use " surface_verts[vertnum].x[0] = surface_verts[vertnum].x[0] - 0.3*dt " to update my boundary surface vertex coordinates. Is this enough?