* A colloidal dispersion under steady (DC) zigzag shear flow. [#scf7bfe8]
#youtube(n4KjvbCYAWk)
#youtube(qvhI4pFLNsw)
- 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
&br;&br;
- Data plot
> gnuplot
...
gnuplot> set yrange [0:10]
gnuplot> plot "out1" u 1:5 t "viscosity" w line
#ref(viscosity.jpg,,75%)
----
* A colloidal dispersion under oscillatory (AC) zigzag shear flow. [#l6655d17]
#youtube(ERlpTZ080wU)
#youtube(vP4m4t9upV0)
- 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
#ref(stress-strain.jpg,,75%)
//#ref(viselaN500a.jpg,,50%)
----
- Files needed for reproducing this simulation
-- Input UDF file: &ref(shear_dc.udf); &ref(shear_ac.udf);
-- Define UDF file: &ref(define.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
-- Visualization
--- GOURMET: &ref(particleshow_velocity.py);
--- AVS/Express:　&ref(shear_avs.v);
----
- Related Papers
-- Takuya Iwashita, Ryoichi Yamamoto, Direct numerical simulations for non-Newtonian rheology of concentrated particle dispersions, [[cond-mat arXiv:0905.0130:http://xxx.yukawa.kyoto-u.ac.jp/abs/0905.0130]]
