A colloidal dispersion under steady (DC) zigzag shear flow.

  • Simulation parameters
    • CFD Lattice: 128 x 128 x 128 mesh
    • Number of Particles: N = 500
    • Diameter of Particles: D = 8 mesh
    • Volume Fraction: Φ = 0.064
    • Temperature: kBT = 1
    • Shear Rate: 0.01
    • Number of Iteration Steps: 20,000

  • Data plot
   > gnuplot
   ...
   gnuplot> set yrange [0:10]
   gnuplot> plot "out1" u 1:5 t "viscosity" w line
viscosity.jpg

A colloidal dispersion under oscillatory (AC) zigzag shear flow.

  • Simulation parameters
    • CFD Lattice: 128 x 128 x 128 mesh
    • Number of Particles: N = 500
    • Diameter of Particles: D = 8 mesh
    • Volume Fraction: Φ = 0.064
    • Temperature: 0.01
    • Shear Rate: 0.01
    • Frequency: 0.05
    • Number of Iteration Steps: 5,000
  • Data plot
   > gnuplot
   ...
   gnuplot> set yrange [-0.05:0.05]
   gnuplot> plot "out2" u 1:6 t "Shear stress" w line, "out2" u 1:2 t "Shear rate" w line
stress-strain.jpg

  • Files needed for reproducing this simulation
    • Input UDF file: fileshear_dc.udf fileshear_ac.udf
    • Define UDF file: filedefine.udf [v3.02]
    • Command (Remove "./" if you use Windows command prompt. Replace ">&" with "2>" if you use sh, bash or Windows command prompt.)
   > mkdir ./avs_dc
   > mkdir ./avs_dc/avs
   > ./kapsel -Ishear_dc.udf -Ooutput_dc.udf -Ddefine.udf -Rrestart_dc.udf >& out1
   > ./kapsel -Ishear_ac.udf -Ooutput_ac.udf -Ddefine.udf -Rrestart_ac.udf >& out2

  • Related Papers
    • Takuya Iwashita, Ryoichi Yamamoto, Direct numerical simulations for non-Newtonian rheology of concentrated particle dispersions, cond-mat arXiv:0905.0130

Attach file: filedefine.udf 23 download [Information] fileshear_dc.udf 78 download [Information] fileshear_avs.v 72 download [Information] fileshear_ac.udf 67 download [Information] fileparticleshow_velocity.py 79 download [Information] fileparticleshow.py 25 download [Information] filestress-strain.jpg 95 download [Information] fileviscosity.jpg 106 download [Information] fileviselaN500a.jpg 378 download [Information] filedc128_visco.jpg 347 download [Information]