V0.0.2

Features

• Lagrange Particle Solver

  • Forces:
    • Gravity
    • Buoyancy
    • Stokes Drag
    • Non-linear Drag
  • Integration methods:
    • Forward Euler
    • Implicit Euler
  • analytical tests:
    • free fall
    • stokes drag
    • terminal velocity
  • simple injection model

• Lattice Boltzmann Solver

  • add D3Q19 and D3Q27
  • Boundary conditions
    • Wet node equilibrium method wall
    • Wet node non-equilibrium extrapolation method wall
    • Wet node non-equilibrium bounce-back method wall
    • BB Dirichlet bnd
    • AntiBB pressure bnd
    • Neumann NEEM bnd
  • Analytical test:
    • Poisson:
      • 1D Debye-Hueckel
      • 1D Diffusion Slab
      • 2D Helmholtz Equation
    • Navier-Stokes:
      • Couette
      • Poiseuille
  • Examples:
    • Navier-Stokes:
      • single step
      • double step
      • flow around cylinder
    • Poisson
      • single step
      • double step
      • 2D diffusion
      • 2D Debye-Hueckel

• Math expression support for boundary conditions

Testing

• check for divergence when debug is active
• write test report in CSV
• for analytical testcases allow alignment with the boundary

Usability

• add pressure forcing term in periodic boundary condition
• allow to set a bnd per geometry obj
• allow setting "conv_interval" for the interval for the convergence check
• write output every "60" seconds by default as a keep alive msg
  • time interval is settable by "keep_alive_time"

IO

• set output dir and solution file name
• allow multiple cell output filters
• correctly handle switch between int and double in writePoints()

Bugs

• segmentation fault after divergence
• write out full double precision
• [LBM][POISSON] fix D2Q9 for Poisson
• error in Base64 encoding

Documentation

• improve documentation of testcases

Refactoring

• reduce the number of debug levels
• refactor output cell filter code
• remove shift from base64 which didn't work