Forward simulations of numerical model developed in this study. Boundary conditions here are relevant to the centrifuge experiments using repacking parameters in eq. (16). A) Olivine centrifuge experiment ZOB5 and B) chromite experiment SM21. The forward models in black show good agreement with the experimental data. The compaction length, \(\delta_{c}\), normalized by the height of the experiment for the given set of \(\xi_{\text{ref}}\) and \(\phi_{m}\) in black is calculated and fixed. \(\phi_{m}\) is then taken to its extremes (either zero or approaching minimum experiment melt fraction) and \(\xi_{\text{ref}}\) is solved for. The simulations demonstrate the trade off between the two rheologic parameters that determine the compaction length (here melt viscosity is fixed).