Purely elastic cases do not work

[VatsalSy]

The fully elastic case archived_codes/burstingBubbles_elastic_coated.c ($De \to \infty$) breaks down close to the singularity of focussing capillary waves.

Case 1002:

Ec = 0.5 with coating fraction of 4.26%
https://github.com/user-attachments/assets/8c2496be-28fe-467d-8f0c-8c4a6a6f68b2

Case 1003:

Ec = 0.5 with coating fraction of 0.018%
https://github.com/user-attachments/assets/e30bf7e0-badf-436c-9ac3-2ff21510bbe6

Workaround:

Use the viscoelastic codes burstingBubbles_viscoelastic_coated.c and burstingBubbles_viscoelastic_coated_dewets.c and set De to an extremely large value.. This should work (tested for $De = 1e4$).