Getting Unexpected Results After Increasing Grid Resolution from 2^10 to 2^11

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Nivesh Mishra

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Dec 6, 2025, 4:29:13 AM (yesterday) Dec 6

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Hello Basilisk users,

I am using a sandbox setup to simulate a droplet impacting a liquid pool. At a maximum refinement level of 2^10, the results look quite good, and the free-surface profile matches well with the literature. However, the timing of the profiles was not matching exactly.

To investigate this, I increased MAXLEVEL from 2^10 to 2^11. After this change, I observed that the entire interface behavior changed significantly. In particular, some noise appears at the interface, and the overall evolution looks different from the 2^10 case.

I am attaching images of the results obtained at both 2^10 and 2^11 for comparison.

Could this issue be related to boundary conditions, or is there something else that could cause this sensitivity to grid refinement?

Any suggestions or insights would be greatly appreciated.

Thank you.

Best regards,
Nivesh Mishra

2^11.png

2^10.png

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