preCICE.xml

<?xml version="1.0"?>

<precice-configuration>

    <solver-interface dimensions="3">

        <data:vector name="Stresses" />
        <data:vector name="Displacements" />

        <mesh name="Fluid_Nodes">
            <use-data name="Displacements" />
        </mesh>

        <mesh name="Fluid_CellCenters">
            <use-data name="Stresses" />
        </mesh>

        <mesh name="Structure_Nodes">
            <use-data name="Displacements" />
        </mesh>

        <mesh name="Structure_CellCenters">
            <use-data name="Stresses" />
        </mesh>

        <participant name="Fluid_Solver">
            <use-mesh name="Fluid_Nodes" provide="yes" />
            <use-mesh name="Fluid_CellCenters" provide="yes" />
            <use-mesh name="Structure_Nodes" from="Structure_Solver" />
            <write-data mesh="Fluid_CellCenters" name="Stresses" />
            <read-data mesh="Fluid_Nodes" name="Displacements" />
            <mapping:nearest-neighbor direction="read" from="Structure_Nodes" to="Fluid_Nodes" constraint="consistent" timing="initial"/>
            <master:mpi-single />
        </participant>

        <participant name="Structure_Solver">
            <use-mesh name="Structure_Nodes" provide="yes"/>
            <use-mesh name="Structure_CellCenters" provide="yes"/>
            <use-mesh name="Fluid_CellCenters" from="Fluid_Solver"/>
            <write-data mesh="Structure_Nodes" name="Displacements" />
            <read-data mesh="Structure_CellCenters" name="Stresses" />
            <mapping:nearest-neighbor direction="read" from="Fluid_CellCenters" to="Structure_CellCenters" constraint="consistent" timing="initial"/>
            <master:mpi-single />
        </participant>

        <m2n:sockets exchange-directory="../" from="Fluid_Solver" to="Structure_Solver" distribution-type="gather-scatter" />
        <!-- OSX: <m2n:sockets network="lo0" exchange-directory="../" from="Fluid_Solver" to="Structure_Solver" />-->
        <!-- supermuc: <m2n:sockets network="ib0" exchange-directory="../" from="Fluid_Solver" to="Structure_Solver" />-->

        <coupling-scheme:serial-implicit>
            <timestep-length value="1.0e-4" />
            <max-timesteps value="100" />
            <participants first="Fluid_Solver" second="Structure_Solver" />
            <exchange data="Stresses" from="Fluid_Solver" mesh="Fluid_CellCenters" to="Structure_Solver" />
            <exchange data="Displacements" from="Structure_Solver" mesh="Structure_Nodes" to="Fluid_Solver" initialize="yes"/>
            <relative-convergence-measure limit="1.0e-3" data="Displacements" mesh="Structure_Nodes" suffices="0" />
            <max-iterations value="200" />
            <extrapolation-order value="2" />

            <post-processing:IQN-ILS>
                <data mesh="Structure_Nodes" name="Displacements" />
                <initial-relaxation value="0.001" />
                <max-used-iterations value="200" />
                <timesteps-reused value="2" />
                <filter type="QR1" limit="1e-8" />
            </post-processing:IQN-ILS>

        </coupling-scheme:serial-implicit>

    </solver-interface>

</precice-configuration>