  We present a practical cell-centred volume-of-fluid method developed within a
pure Eulerian setting for the simulation of compressible solid-fluid problems.
The method builds on a previously published diffuse-interface Godunov-type
scheme through the addition of a specialised mixed-cell update that is capable
of maintaining sharp interfaces indefinitely. The mixed-cell update is local
and may be viewed as an interface-sharpening extension to the underlying
diffuse-interface scheme along the lines of other techniques such as Tangent of
Hyperbola INterface Capturing (THINC), and hence the method can be
straightforwardly extended to include other coupled physics. We validate the
method on a range of challenging test problems including a collapsing metal
shell, cylinder impacts and the three-dimensional simulation of a buried
explosive charge. Finally we demonstrate the robustness of the method, and its
use in a multi-physics context, by modelling the BRL 105mm unconfined shaped
charge with reactive high-explosive burn and rate-sensitive plasticity.
