The next major release.

To make the release, increment the version number to 4.1 and create a 4-stable branch. Add release notes detailing all API changes. Increment the version on master to 5.0dev.

Release Notes

New features

• Galerkin coarsening for Multigrid
• LBM-PE-Coupling:
  • new coupling approach for unresolved particle interactions (discrete particle method)
  • adaptive grid refinement for coupled simulations
  • load balancing functionalities for coupled simulations
  • module description
• integrated pystencils and lbmpy code generation for kernels and pack infos
• new GPU communication, including support for GPUDirect
• load balancing functionality for the pe

Major changes

• A compiler with full C++14 support is now required
• All Boost usage has been replaced with the corresponding standard library functionality, except for Boost.Python (used for the python_coupling module), Boost.PropertyTree (used in config::configToBoostPropertyTree) and Boost.Graph (used by math::EquationSystem). This usually means you need to replace boost:: with std:: in your code and change some #includes.
• pe::Union, boundary::BoundaryHandling and boundary::BoundaryHandlingCollection are now variadic templates instead of taking a tuple of bodies/boundaries/handlers. This means that you need to replace std::tuple<A,B> with A,B in these cases.
• dynamic load balancing now possible with levels ignored
• using smart pointers for all memory management inside the pe

Minor changes

• Remove dependency resolution from Singleton
• added warning and assertion to findContainingProcess for points out of domain
• removed PtrVector
• rebased Union on BodyStorage
• removed Node
• removed contacts from RigidBody
• removed attached bodies
• removed attachables
• changed return type to std array for improved usability
• ExtendedBoundaryHandlingFactory now uses ParserUBB instead of UBB so that velocity profiles can be specified as an equation in a parameter file
• Fix implict/explict typos in pe::cr
• API changes in blockforest::PhantomBlockForest, blockforest::loadbalancing, pe::amr::weight_assignment
• API change for vtk::VTKOutput::getFilenames
• made setMass protected
• Enabled the body selection functions for PSM coupling method
• changed body mapping functions: removed most of them, added mapping-decider function, accomodated changes to test cases, added new mapping test case
• changed pe coupling mapping functions interfaces, added new mapping functions, adapted test cases and benchmarks
• extended dem collision model with dt
• Change in lubrication correction functionality to not require the lattice…
• Change in lubrication correction functionality to not require the lattice model but use the dynamic viscosity directly
• pe::createBlockForest changed to support a variable number of processes
• made SendBuffer memory access more high level
• changed BodyStatistics to use shared_ptr instead of reference
• implemented IProbe communication as an alternative to two message communication for unknown size communication
• new creation helpers for BlockForest
• grid_generators now allow range based for loops