How to combine a MPEG file to create an animation playback? (I have four MPEG file for liquid flow profile at certain timesteps)

for animation playback u need to setup animation at solve>animate>define. put in the display surface u want and the result u want to display. The system will automatically capture each time step result as u specified.

The animation can consume alot of harddisk space, beware of that.

After u finish simulation, go to solve>animate>playback set the write/record format into mpeg then u can save the animation of ur unsteady simulation.