How to draw a bubble shape using level set function?

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Márcio Ricardo Pivello

Draw a contour surface with value zero.

Lena J-T Strömberg

Are they viscous, and what shape?

Janusz Pudykiewicz

The simplest method is indeed based on plotting of zero isolines (or zero iso-surfaces) of a level set function. Some further details and extensive discussion of the problems related to implementation of the level set method is presented at

https://www.diva-portal.org/smash/get/diva2:422383/FULLTEXT04.pdf

I would like to draw your attention to the reinitialization procedure discussed in section 3.2. This procedure is crucial to obtain a high fidelity rendering of the boundary.

I hope that this is useful in resolving your question.