solver-rewrite

README.rst
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			parallel (2D)
			'''''''''''''

			:Sources:

			.. collapse:: parallel_2d.cc (click to expand)

			.. literalinclude:: examples/c++/solid_mechanics_model/parallel/parallel_2d.cc
			:language: c++
			:lines: 20-

			.. collapse:: material.dat (click to expand)

			.. literalinclude:: examples/c++/solid_mechanics_model/parallel/material.dat
			:language: text

			:Location:

			``examples/c++/solid_mechanics_model/`` `parallel <https://gitlab.com/akantu/akantu/-/blob/master/examples/c++/solid_mechanics_model/parallel>`_

			In ``parallel``, an example of how to run a 2D parallel simulation is presented.

			First, the mesh needs to be distributed among the processors. This is done with::

			const auto & comm = Communicator::getStaticCommunicator();
			Int prank = comm.whoAmI();
			if (prank == 0) {
			mesh.read("square_2d.msh");
			}
			mesh.distribute();

			Here ``prank`` designate the processor rank. The mesh is read only by processor 0 and then distributed among all the processors.
			All the prints are done only by processor 0. For instance::

			if (prank == 0) {
			std::cout << model.getMaterial(0) << std::endl;
			}

			.. figure:: examples/c++/solid_mechanics_model/parallel/images/parallel.png
			:align: center
			:width: 60%

			Displacement in the x direction.