What should be expected to happen in the following situation?

A fluid control in some random shape such as asterisk character mesh or torus mesh is placed within the bounding box of a fluid inflow. The mesh could have many islands. At start time the fluid control does not intersect the fluid inflow. The fluid control is not changing position, to emphasize the fluid control is not being passed through a standing body of fluid or dynamic inflow. Is it reasonable to expect the fluid to attain the shape of the fluid control with allowances for some loss of detail related to the resolution of the fluid domain?

Here is a simplification of the above paragraph. You may imagine a doughnut mesh fluid type control, within a open box fluid type inflow as illustrated in the image below. I am choosing a simplification although the current work could be any other shape.

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The image below is a detail of the domain. Open spaces while an inflow moves toward the fluid control is a goal and 50%+- successful.

enter image description here

Blender Documentation

The documentation below passes the control through existing fluid shown as a contrast to this Blender Users scenario.


Additional Context

I see results in the simulation but they are not what I expect. I am trying to get independent observations from people who have been in the same situation in the very recent past.

This Blender User can see the fluid control affect the fluid but the final shape is not that of the fluid control as far as I can examine. I have only been willing to let a fluid simulation run for 6 hours. Therefore I wont see a 24 hours simulation on my machine.

  • $\begingroup$ Would you be able to share your blend file for this? Running your simulation would make it easier to see the behaviour you're getting. Also, are the objects moving at all? - I notice that you have forces for both Attraction and Velocity... I think they can potentially conflict but if the objects are stationary then having the Velocity Force set will slow down the simulation. Also, from experience, the higher the radius for the forces, the longer the simulation time - try reducing the radius if possible. $\endgroup$ – Rich Sedman Oct 4 '18 at 16:11

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