[ADD] new Mixer showcase

apps/showcases/CMakeLists.txt

-add_subdirectory( BidisperseFluidizedBed )
\ No newline at end of file
+add_subdirectory( BidisperseFluidizedBed )
+add_subdirectory( Mixer )

apps/showcases/Mixer/CMakeLists.txt

+waLBerla_link_files_to_builddir( *.cfg )
+
+waLBerla_add_executable( NAME Mixer
+   FILES Mixer.cpp
+   DEPENDS core mesa_pd sqlite vtk )

apps/showcases/Mixer/GenerateModule.py

+#! /usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from mesa_pd import Module
+import mesa_pd.data as data
+import mesa_pd.kernel as kernel
+import mesa_pd.mpi as mpi
+
+import argparse
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='Generate all necessary files for the waLBerla mesa_pd module.')
+    parser.add_argument('path', help='Where should the files be created?')
+    args = parser.parse_args()
+
+    mpd = Module(args.path)
+    ps = mpd.add(data.ParticleStorage())
+
+    ps.set_shapes("Sphere", "HalfSpace", "Box", "CylindricalBoundary")
+
+    ps.add_property("position",         "walberla::mesa_pd::Vec3", defValue="real_t(0)", syncMode="ALWAYS")
+    ps.add_property("linearVelocity",   "walberla::mesa_pd::Vec3", defValue="real_t(0)", syncMode="ALWAYS")
+    ps.add_property("invMass",          "walberla::real_t",        defValue="real_t(1)", syncMode="ON_GHOST_CREATION")
+    ps.add_property("force",            "walberla::mesa_pd::Vec3", defValue="real_t(0)", syncMode="NEVER")
+
+    ps.add_property("shapeID",          "size_t",                  defValue="",          syncMode="ON_GHOST_CREATION")
+    ps.add_property("rotation",         "walberla::mesa_pd::Rot3", defValue="",          syncMode="ALWAYS")
+    ps.add_property("angularVelocity",  "walberla::mesa_pd::Vec3", defValue="real_t(0)", syncMode="ALWAYS")
+    ps.add_property("torque",           "walberla::mesa_pd::Vec3", defValue="real_t(0)", syncMode="NEVER")
+
+    ps.add_property("type",             "uint_t",                  defValue="0",         syncMode="ON_GHOST_CREATION")
+
+    ps.add_property("flags",            "walberla::mesa_pd::data::particle_flags::FlagT", defValue="", syncMode="ON_GHOST_CREATION")
+    ps.add_property("nextParticle",     "int",                     defValue="-1",        syncMode="NEVER")
+
+    ps.add_include("blockforest/BlockForest.h")
+    ps.add_property("currentBlock",     "blockforest::BlockID",    defValue="",          syncMode="NEVER")
+
+    mpd.add(data.LinkedCells())
+    mpd.add(data.SparseLinkedCells())
+    mpd.add(data.ShapeStorage(ps))
+
+    mpd.add(kernel.DoubleCast(ps))
+    mpd.add(kernel.ExplicitEuler())
+    mpd.add(kernel.ForceLJ())
+    mpd.add(kernel.HeatConduction())
+    mpd.add(kernel.InsertParticleIntoLinkedCells())
+    mpd.add(kernel.LinearSpringDashpot())
+    mpd.add(kernel.NonLinearSpringDashpot())
+    mpd.add(kernel.SingleCast(ps))
+    mpd.add(kernel.SpringDashpot())
+    mpd.add(kernel.TemperatureIntegration())
+    mpd.add(kernel.VelocityVerlet())
+    mpd.add(kernel.VelocityVerlet())
+
+    mpd.add(mpi.BroadcastProperty())
+    mpd.add(mpi.ClearGhostOwnerSync())
+    mpd.add(mpi.ClearNextNeighborSync())
+    mpd.add(mpi.Notifications(ps))
+    mpd.add(mpi.ReduceContactHistory())
+    mpd.add(mpi.ReduceProperty())
+    mpd.add(mpi.ShapePackUnpack(ps))
+    mpd.add(mpi.SyncGhostOwners(ps))
+    mpd.add(mpi.SyncNextNeighbors(ps))
+    mpd.add(mpi.SyncNextNeighborsNoGhosts(ps))
+
+    mpd.generate()

apps/showcases/Mixer/Mixer.cfg

+MIXER
+{
+   simulationCorner < 0, 0, 0 >;
+   simulationDomain < 0.3, 0.3, 0.3 >;
+   blocks < 1,1,1 >;
+   isPeriodic < 0, 0, 0 >;
+
+   radius        0.004;
+   spacing       0.010;
+   vMax          0.1;
+   rotationSpeed -500;
+   gravity < 0.0, 0, -9.81 >;
+
+   dt                 0.000001;
+   simulationSteps    100000;
+   visSpacing         100;
+}