Variable surface tension and CLSVOF

[Stephane Popinet]

Dear all,

The latest release includes a new coupled levelset and VOF two-phase
solver and the integral formulation of variable surface tension for 2D
and axisymmetric problems.

See:

http://basilisk.fr/src/two-phase-clsvof.h
http://basilisk.fr/src/integral.h
http://basilisk.fr/src/test/marangoni.c

enjoy,

Stephane