D modeling
==============

This test is very similar to B modeling. It allows you to test code coupling in MPI
by replacing fluid-mechanical chaining by a weak coupling (without dependence of pressure on displacement).

Note: this test would be close to a coupling for fluid-structure interaction (IFS) if the pressure was dependent
to the coordinates on the deformed surface whereas here it only depends on the original coordinates.

Characteristics of modeling
-----------------------------------

Here, a pressure field is defined on the fluid mesh depending on time and space.
according to function :math:`1.E\mathrm{-}4\mathrm{\times }\mathit{INST}\mathrm{\times }(X+Y+Z)`.

This pressure field will be interpolated onto the solid mesh to serve as an input load.

The solid calculation is carried out at the times :math:`0.2`, :math:`0.4`,,, :math:`0.6`, :math:`0.8` and :math:`1`.


Characteristics of the mesh
----------------------------

Unimportant