Video Animations

Earlier work on Flows (1992) in D.D. Joseph's laboratory

Howard Hu:

• 1109 particles in a channel flow:
  • Case1: up flow;   [36M QuickTime]
  • Case 2: down flow;   [39M QuickTime]
  • Case 3: Poiseuille flow.   [5.2M QuickTime]

• 10 Particles chaining in viscoelastic fluids in an infinite channel:
  • in a strong viscoelastic fluid: Re=0.2, De=1.2, M=0.49;   [6.4M QuickTime]
  • in a weak viscoelastic fluid: Re=1.5, De=1.2, M=1.34;   [5.6M QuickTime]
  • in a Newtonian fluid.   [6M QuickTime]

Adam Huang:

• 6 particles falling under gravity in an Oldroyd B fluid [1.5 MB mpg] made from an actual dynamical simulation. It shows particles behave differently in viscoelastic fluids than they do in Newtonian fluids. In Newtonian fluids, particles draft, kiss, and tumble. In viscoelastic fluids, by contrast, particles draft, kiss, and chain. Long chains fall faster than short chains.

Peter Huang:

• Sedimentation of two elliptic particles in a 2-D channel of an Oldroyd-B fluid   [2.5M]. The particles are released side by side initially and wish to chain with their major axis vertical. Particles behave as tumbling, kissing and chaining in a viscoelastic fluid. See the details in the paper "Direct simulation of the sedimentation of elliptic particles in Oldroyd-B fluids".
• Sedimentation of 240 circular particles in a closed box of a Newtonian fluid.   [6.5M]
• Fluidization of 240 circular particles in a Newtonian fluid (inflow velocity U=1.0cm/s).   [5.1M]

Migration of 56 neutrally buoyant particles in a pressure driven flow:

• in a Newtonian fluid: Re=12.5;   [9.6M]
• in a generalized Newtonian fluid (n=0.5): Re=42;   [4.9M]
• in a generalized Newtonian fluid (n=0.4): Re=56;   [2.6M]
• in an Oldroyd-B fluid: Re=0.156, De=2.50, E=16, M=0.625;   [4.7M]
• in an Oldroyd-B fluid with shear thinning (n=0.5): Re=0.161, De=2.57, E=16, M=0.643;   [1.9N]
• in an Oldroyd-B fluid with shear thinning (n=0.4): Re=0.162, De=2.59, E=16, M=0.647;   [2M]

Lift off and equilibrium of particles in Newtonian and viscoelastic fluids:

• Single particle with Re=0.6, De=0.12, E=0.20;   [0.8M]
• Single particle with Re=0.6, De=0.30, E=0.50;   [1.3M]
• Single particle with Re=1.5, De=0.00, E=0.00;   [1.3M]
• Single particle with Re=1.5, De=0.75, E=0.50;   [1.7M]
• Two layers of particles with Re=0.6, De=0.12, E=0.20;   [4.1M]
• Two layers of particles with Re=0.6, De=0.30, E=0.50;   [4.7M]
• One neutrally buoyant particle with rotation in a Newtonian fluid: Re=5.4;   [2.4M]
• One neutrally buoyant particle without rotation in a Newtonian fluid: Re=5.4;   [3.8M]
• One non-neutrally buoyant particle with rotation in a Newtonian fluid: Re=5.4;   [1.4M]
• One non-neutrally buoyant particle without rotation in a Newtonian fluid: Re=5.4;   [1.4M]
• One non-neutrally buoyant particle with rotation in a Newtonian fluid: Re=16.2;   [1.4M]
• One non-neutrally buoyant particle without rotation in a Newtonian fluid: Re=16.2.   [4.3M]
• Saltation of 180 particles in a Newtonian fluid: Re=180, particle density=1.01g/cc.   [2.6M]

Lift off of large number of particles (density=1.01g/cc) in Newtonian fluids (dp/dx=2.7, Re=16.2) with parallel computations:

• 180 particles: by meshtv [3.8M] or  by Tecplot;   [0.4M]
• 10,240 particles: by Tecplot.   [0.2M]

Neelesh A. Patankar:

• Direct simulation of resuspension of two layers of circular parcels in a Newtonian fluid.   [4.7M]
• 2D-Lagrangian numerical simulation of the sedimentation of 17640 parcels.   [0.5M]
• 3D-Lagrangian numerical simulation of the sedimentation of 17280 parcels.   [1M]
• Lagrangian numerical simulation of the sedimentation of a monolayer of 288 spherical parcels.   [0.5M]
• Lagrangian numerical simulation of the sedimentation of 1024 spherical parcels.   [0.6M]
• Lagrangian numerical simulation of a bubbling fluidized bed of a monolayer of 1169 spherical parcels.   [0.8M]
• Lagrangian numerical simulation of a bubbling fluidized bed of a monolayer of 1204 spherical parcels.   [0.7M]
• 3D Lagrangian numerical simulation of a bubbling fluidized bed (due to a jet) with 9720 parcels. (3D View).   [0.6M]   (2D View).   [0.6M]
• 3D-Lagrangian numerical simulation of the slot problem. 2D view of contour plot for volume fraction. Maximum number of parcels: 117000.   []0.3M
• 3D-Lagrangian numerical simulation of the slot problem. 2D view of contour plot for volume fraction. Maximum number of parcels: 198000.   [0.6M]

Hyung G. Choi:

• Parallel computation of sedimentation of 1000 particles in container of a Newtonian fluid.   [1M]
• Parallel computation of suspension of 200 particles in a Newtonian fluid: particle density=1.2, dp/dx=1.0   [5M]     (or movie #2)   [3.6M]
• Parallel computation of suspension of 250 particles in a Newtonian fluid: particle density=1.1, dp/dx=2.0.   [3.6M]
• Splitting computation of 1 particle resuspension at dpdx=5.0(fluid viscosity=0.01,particle density=1.2).   [14M]
• Splitting computation of 300 particles resuspension at dpdx=5.0(fluid viscosity=0.01,particle density=1.2 part.1).   [1.8M]
• Splitting computation of 300 particles resuspension at dpdx=5.0(fluid viscosity=0.01,particle density=1.2 part.2).   [3.7M]
• Splitting computation of 300 particles resuspension at dpdx=5.0(fluid viscosity=0.01,particle density=2.0 part.1).   [2M]
• Splitting computation of 300 particles resuspension at dpdx=5.0(fluid viscosity=0.01,particle density=2.0 part.2).   [2.5M]
• Splitting computation of 300 particles resuspension at dpdx=0.02(fluid viscosity=0.01,particle density=1.01).   [9.5M]
• Splitting computation of 300 particles resuspension at dpdx=2.7(fluid viscosity=1.0,particle density=1.01 ).  [7.7M]

Tsorng-Whay Pan:

Fluidized bed of 1204 spheres in a 3-D channel:

• Case 1: U=4;  [6.4M]
• Case 2: U=5.  [4.7M]
• Case 3:  U4  [2.6M]
• Case 4:  U4.5  [2M]
• Case 5:  New U4  [10M]
• Case 6:  New U4.5  [8.9M]

Taehwan Ko

Numerical simulation of 300 circular particles in a plane Poiseuille flow of a Newtonian fluid ( fluid viscosity=0.1, Shear Reynolds Number=1800 )

• 300 particles [4MB] a CD may be obtained showing smoother animation [64M].