Fig. 4. Rise of a 2D cylindrical porosity wave with constant bulk viscosity
b´ = 1. The background viscosity is 2%, the maximum porosity is 6%.
Rm = 10, Rtn = 0.0288, no melting and freezing is assumed. All quantities
are non-dimensional. The non-dimensional compaction length based
on the background porosity is 0.01667. a) melt fraction, b) divergence
of the matrix velocity, c) vertical segregation velocity, d) horizontal
segregation velocity, e) buoyancy contribution of the vertical segregation
velocity, f) compaction contribution to the vertical segregation velocity.