Direct Simulation of the Motion of Particles in Flowing Liquids

Group Discussion

Two size of solid particles resuspended in a Newtonian fluid -- by Peter Huang

Animation video in GIF form

Angular Slip Velocity and Lift -- by Douglas Ocando

The draft of the paper in MS Word

Sedimentation and Fluidization:

Numerical results of the fluidization of 240 circular particles in a 2-D channel by Peter Huang with Partmover code; the experimental results by Runyuan Bai and Peter Huang. The graphs are in postscript:

Figure 1: History of fluidization (Height vs. time) (Numerical solution).
Figure 2: Height of fluidized bed vs. inlet velocity (Numerical solution).
Figure 3: Comparison of Height of fluidized bed vs. inlet velocity (Numeric/Experiment).
Figure 4: Particle positions at different time with U=0.25 (Numeric).
Figure 5: Particle positions at different time with U=1.0 (Numeric).

Fluidization results by Dr. Tsorng-Whay Pan with DML code can be found in his web site. Here are some of the his results:

Figure 1: History of fluidization (Height vs. time) (with DML code).
DLM simulation of a fluided bed of 1204 1/4" spheres: 1) U=2.0 cm/s; 2) U=3.0 cm/s; 3) U=4.0 cm/s; 4) U=5.0 cm/s.
Figure 2: History of fluidization (Height vs. time) #2.

Sedimentation results by Matt Knepley with parallel PM code can be found in his Computational Fluid Mechanics and under tittle Movies.

Lift off of Solid Particles in a Poiseuille Flow:

Numerical results with Partmover code by Peter Huang. The following figures are the effects of elasticity number on the lift off of one circular particle in a Poiseuille flow of a Maxwell fluid.

Conditions:
Channel: width=12*d;
Particle: diameter (d)=1 cm, density=1.01 g/cc;
Fluid: viscosity=1 g/cm s.
Figure 1: The effect of elasticity number on the slip velocity of the lift off.
Figure 2: The effect of elasticity number on the height of the lift off.

Matt Knepley's PM Physical Analysis:

Some other recent results in connection to the NSF Grand Challenge Project by Tsorng-Whay Pan at University of Houston. Choose the appropriate title to download a postscript file.

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Last updated November 30, 2000