Use OpenMP include path

See merge request walberla/walberla!469

Revamp LB GPU Benchmark App for In-Place Streaming

See merge request walberla/walberla!463

Basic fluidized bed showcase

See merge request walberla/walberla!468

Added basic fluidized bed showcase, demonstrating the fluid-particle / lbm-mesapd coupling functionalities for an application

Add documentation about writing distance octree on root node only

See merge request !467

Fix SimpleDiffusionDirichlet

Closes #149

See merge request walberla/walberla!466

Add include guards

Closes #148

See merge request walberla/walberla!461

Change reference to const reference in stringToNum

See merge request walberla/walberla!462

add gcc 11 to CI

See merge request !456

HashGrids for mesapd

See merge request walberla/walberla!457

Workaround for __BIGGEST_ALIGNMENT__ on Clang

See merge request !458

On x86_64, this is always 128 bits, rendering it incompatible with AVX.
GCC reports the maximum enabled vector width (which is what we want) and Intel reports the maximum supported vector width (which is okay too).

Fixed possible divide by zero in mesh vtk writer and added case to test

See merge request walberla/walberla!455

Fixed ordering of cmake commands

See merge request walberla/walberla!454

Minor cmake fixes

See merge request walberla/walberla!452

Jinja2 3.0 compatibility

See merge request walberla/walberla!453

fix namespace of hasing function

See merge request walberla/walberla!450

Force use of std::experimental::filesystem with GCC 8

See merge request walberla/walberla!449

Code Generation for Lattice Boltzmann In-Place Streaming Patterns

See merge request walberla/walberla!446

Field alignment on ARM

See merge request walberla/walberla!448