WALBERLA_LOG_INFO_ON_ROOT("Using a block grid of size "<<bestSizeBlockGrid3D<<" ("<<bestSizeBlockGrid<<") resulting in "<<bestNumRootBlocks<<" root blocks.");
WALBERLA_LOG_INFO_ON_ROOT("Using a block grid of size "<<bestSizeBlockGrid3D<<" ("<<bestSizeBlockGrid<<") resulting in "<<bestNumRootBlocks<<" root blocks.")