GeoTaichi-v0.3

New release for GeoTaichi 0.3.0

Bugs fix:

• Fix the support domain of B-Spline MPM.
• Fix bugs when simulating with MLSMPM.
• Fix bugs when computing the intersection area of sphere and triangle.
• Fix bugs when finding neighbors between MPM and patches.

New features:

• A high-performance and memory saving Level-set DEM module and coupling with MPM.
• Complex boundaries generated by the digital elevation model.
• Flexibly generate level set particle from mathematical-based, geometry-based and polygon-based DEM model.
• Add energy tracking functions, i.e., kinetic, gravitational, friction, damping, contact energy, for DEM particles.
• Add hierarchical linked-cell method for polydisperse granular systems.
• Add energy conserving model for irregular particles, the energy function includes linear model, hertz model and barrier and smooth friction model.
• Add explicit single point two phase MPM module.
• More advanced contact algorithm in MPM, including MPMContact, GeoContact, and DEMContact,
• More advanced shape functions, including linear function, gradient smoothed linear functions, GIMP, quadratic and cubic B-Spline.
• Two-dimensional and Axisymmetric MPM modules.
• Add total lagrangian MPM modulus.
• More stabilization techniques in MPM, including $\nabla \bar{v}$, APIC, TPIC and particle shifting method.
• Add sparse data structure for background grid in MPM.
• Automatically delete overlap MPM and DEM before simulation.

GeoTaichi-v0.2

New release for GeoTaichi 0.2.0

Bugs fix:

• Fix some typos in MPM and MPDEM (#1).
• Fix bugs when generate MPM bodies (#2).
• Fix incorrect results when simulating Newtonian Fluids (#5 ).
• Fix history overlap inheritance in DEM module.
• Fix incorrect parameter calculation in Hertz-Mindlin Model.

Improvements:

• Less GPU memory allocation in MPM modules.
• Ignore unnecessary warnings from taichi.

New features:

• More stable and accurate advanced constitutive models.
• Biaxial and Triaxial shear test for Mohr-Coulomb model.
• Add some comments for kernel functions (#3 ) (by cloneorcopy).
• Install package from pip: pip install geotaichi.
• Generate MPM bodies from txt/obj/ply/stl files, see example.

GeoTaichi-v0.1

A package includes material point method, discrete element method and material point-discrete element method