Hi, I want to simulate the motion of a Spherical ball in an oil channel with COMSOL.this spherical ball must move the path in the oil with 5 (m/s) alongside the channel, and the water temperature changes In the radial direction.

I want to see the effect of spherical ball motion on the temperature in the pipe. and I can't fix the ball and give a velocity inlet in the channel entrance. I searched a lot but did not find anything similar.

Please guide me on which interfaces I should use. I really need your help ASAP or give me a Related tutorial file.

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