A helix pulled at a constant velocity †

• Simulation parameters (N30k3.0p52.0_vy.udf)
  • CFD Lattice: 256 x 256 x 256 mesh
  • Number of Beads: N = 30
  • Diameter of Particles: D = 4 mesh
  • Volume Fraction: Φ = 0.00048
  • Velocity: V = -0.005
  • Number of Iteration Steps: 100000
  • Computation Time: 4 days on single core
• Parameters of the helical particle
  • Orientation: crockwise
  • Number of Beads: N = 30
  • Number of Turns: k = 3.0
  • Helical Pitch: p = 52.0 mesh

A helix rotated at a constant angular velocity †

• Simulation parameters (N30k3.0p52.0_omegay.udf)
  • CFD Lattice: 256 x 256 x 256 mesh
  • Number of Beads: N = 30
  • Diameter of Particles: D = 4 mesh
  • Volume Fraction: Φ = 0.00048
  • Angular Velocity: Ω = 0.00041
  • Number of Iteration Steps: 100000
  • Computation Time: 4 days on single core
• Parameters of the helical particle
  • Orientation: crockwise
  • Number of Beads: N = 30
  • Number of Turns: k = 3.0
  • Helical Pitch: p = 52.0 mesh

A helix in sedimentation †

• Simulation parameters (N30k3.0p52.0_gravity.udf)
  • CFD Lattice: 256 x 256 x 256 mesh
  • Number of Beads: N = 30
  • Diameter of Particles: D = 4 mesh
  • Volume Fraction: Φ = 0.00048
  • Gravity: g = -0.01
  • Number of Iteration Steps: 100000
  • Computation Time: 1.1 day on 8 cores (with ICC+MKL+OMP)
• Parameters of the helical particle
  • Orientation: crockwise
  • Number of Beads: N = 30
  • Number of Turns: k = 3.0
  • Helical Pitch: p = 52.0 mesh

Three helices in sedimentation †

• Simulation parameters (helixes_gravity.udf)
  • CFD Lattice: 256 x 256 x 256 mesh
  • Number of Beads: N = 100
  • Diameter of Particles: D = 4 mesh
  • Volume Fraction: Φ = 0.0016
  • Gravity: g = -0.01
  • Number of Iteration Steps: 100000
  • Computation Time: 1.1 day on 8 cores (with ICC+MKL+OMP)
• Parameters of the helical particles (left-to-right)
  • Number of Beads: N = 35, 25, 40
  • Number of Turns: k = 4.0, 2.5, 3.0
  • Helical Pitch: p = 20.0, 44.0, 36.0

Three helices in planer shear flow with Lees-Edwards PBC †

• Simulation parameters (helixes_shear0005.udf)
  • CFD Lattice: 256 x 256 x 256 mesh
  • Number of Beads: N = 100
  • Diameter of Particles: D = 4 mesh
  • Volume Fraction: Φ = 0.0016
  • Shear Rate: s = 0.005
  • Number of Iteration Steps: 50000
  • Computation Time: 2 days on 8 cores (with ICC+MKL+OMP)
• Parameters of the helical particles (left-to-right)
  • Number of Beads: N = 35, 25, 40
  • Number of Turns: k = 4.0, 2.5, 3.0
  • Helical Pitch: p = 20.0, 44.0, 36.0

• Files needed to reproduce these simulations
  • Input UDF file: s001_t000_rigid.udf N30k3.0p52.0_vy.udf N30k3.0p52.0_omegay.udf N30k3.0p52.0_gravity.udf helixes_gravity.udf helixes_shear0005.udf
  • Define UDF file: define.udf [v3.02]
  • GOURMET: particleshow.py show_velocity2_rigid.py
  • AVS/Express:
• Tools for helical particles
  • helixudf_generator.zip

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