README

Refined version that includes wall layers.

- this causes significant pressure spikes using the default AMI

    dynamicFvMesh   dynamicMotionSolverFvMesh;

- enabling topology change where a 1-to-1 connectivity is established across
  the AMI leads to a much smoother pressure trace.  Ony change needed is to the
  motion solver:

    dynamicFvMesh   dynamicMotionSolverFvMeshAMI;