home | teaching
| cv |
publications | presentations
| movie gallery
Movie gallery
These are sample
results of direct and large-eddy flow simulations
All simulations are
three-dimensional and time-dependent
Simulations were performed at
Multi-Scale Physics Department,
Delft University of Technology
Chemical Engineering Department,
Princeton University
Chemical & Materials
Engineering Department, University of Alberta
Start-up
of solids suspension in a small stirred tank
fully resolved simulation
impeller Reynolds number is 2000
solid over liquid density ratio is 2.5
the contours in the mid-plane indicate the liquid velocity
dnsss.mpg Download 175
Mb
Sheared
granular bed under a mildly turbulent flow
fully resolved spheres
spheres colored by their streamwise velocity
the contours in the end plane indicate the liquid velocity
tshlds.mpg Download 25
Mb
Sheared
granular bed
solid particle motion as a result of a laminar liquid shear flow above
the
particle bed
spheres colored by their streamwise velocity
shgb.mpg Download
42 Mb
Sedimentation
and flocculation in a solid-liquid suspension
fully periodic boundary conditions; gravity down, pressure gradient up
spheres colored by the size of the aggregate they are part of
flocs.mpg Download 144
Mb
Sedimentation
of red-blood-cell-shaped particles through liquid
collision handling is a challenge when dealing with dense suspensions
of non-spherical particles
work by Orest Shardt
rbc_settling.avi Download
36 Mb
Agglomeration
& de-agglomeration in shear flow
spheres interact through a square-well potential; colors denote liquid
velocity
sqwp_shr.mpg Download
11.5 Mb
Startup
of turbulent solids suspension
side views
work by Inci Ayranci
side_exp.avi Download
6.7 Mb side_sim.mpg
Download 75.2 Mb
Particles
in Bingham liquid mobilized by agitation
particles colored by their speed
bingprt.mpg Download
7.8 Mb
Fiber
stretching and folding in shear flow
the fiber is modelled as spheres connected through hinges
sheared_fiber.mpg Download
6.7 Mb
Scalar
mixing by granular particles
colors indicate scalar concentration
granmix.mpg Download
1.5 Mb
Mixing
by fluidized particles in a micro-channel
the channel-based Reynolds numbers is 12
colors indicate scalar concentration
microfluidization.mpg Download
6 Mb
LES
of scalar mixing in a stirred tank
left: vertical cross section
right: horizontal
colors indicate scalar concentration
scalar mixing.mpg Download
13 Mb
Solid-liquid suspension in a
stirred tank
vertical cross-section
through 3D domain
Ruhton turbine, baffled tank
solid_liquid_mixing.avi Download 17 Mb
Particles dissolving in a
turbulently stirred tank
vertical cross-section; colors indicate particle size
work done by Hugo Hartmann
dissolution.avi Download
46 Mb
In
unbaffled mixing tanks particles tend to demix
side view
unbaffled_demixing.mpg Download
71 Mb
Vortex
breakdown in a contracting, strongly swirling flow
cross-section, colors are velocity magnitude
vortex_breakdown.mpg Download 1.5 Mb
Gas-solid separation in a cyclone separator
blue: large particles, red: small particles
gas_cyclone.mpg Download
13 Mb
Sphere sedimenting in a closed container
left: lattice-Boltzmann simulation, rigth: PIV experiment
colors indicate the absolute value of the velocity
work done by Andreas ten Cate
and Kees Nieuwstad
sedimenting_sphere_exp_lb.avi Download 28 Mb
Spherical particles resuspending in a
turbulent shear flow
cross-section through a 3D domain
all spheres have the same size
colors indicate absolute value of the fluid velocity
resuspension.mpg Download 22 Mb
DNS of void formation in a liquid-fluidized
bed
gravity points to the left
periodic boundary conditions in all three dimensions
initial condition is a planar wave instability
fluidization.mpg Download 9.5 Mb
Ordering of a high-Stokes number
solid-liquid suspension under shear
uniformely sized particles
cross section through 3D domain
solids volume fraction is 55%
colors indicate absolute value of fluid velocity
shear_induced_ordering.mpg Download 66 Mb
Liquid-liquid dispersion undergoing a
turbulent burst
cross section through fully periodic 3D domain
turbulent_dispersion.mpg Download 3.5 Mb