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Droplet detachment from moving surface

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Old   March 2, 2023, 16:54
Default Droplet detachment from moving surface
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I have to run a case where the droplet will detach from a moving surface/stage that follows a cosine profile. I designed a model where I defined the moving stage with a hollow in a rectangular 2d domain. I defined a UDF for controlling the stage. But my problem is the model becomes extremely computationally expensive which becomes unstable with time_step > 10^-7. The mesh size also needs to be very small ~2M mesh.

My settings:
The droplet size is: 1.66 mm with a half circle hanging from top hollow moving stage. [which is not shown in the image]

My questing is there any better way to do this? any other approach that can converge with a higher timestep of a larger mesh size?
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droplet, fluent, vof method

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