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Mao-Bin HU ( 胡茂彬 ), G.C. Yang( 杨果成 ), Q.Y. Liu( 刘启一 ), R. Jiang ( 姜锐 ), Q.S. Wu( 吴清松 ) [email protected] granular Chute flow with Two turnings : Flowing behavior and Its optimization. Contents. 1. Motivations 2. Experiment Setup 3. Flowing Behavior 4. Simulation

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Mao bin hu g c yang q y liu r jiang q s wu humaobin@ustc edu cn

Mao-Bin HU (胡茂彬), G.C. Yang(杨果成),

Q.Y. Liu(刘启一), R. Jiang (姜锐), Q.S. Wu(吴清松)

[email protected]

granular Chute flow with Two turnings:Flowing behavior and Its optimization


Contents
Contents

  • 1. Motivations

  • 2. Experiment Setup

  • 3. Flowing Behavior

  • 4. Simulation

  • 5. Optimization Discussions




Bio systems bottleneck bending
Bio-systems (bottleneck & bending)

Molecule Motor

Blood Cell


Bottlenecks in coal pipelines
Bottlenecks in Coal Pipelines

Merging &

Width Decrease

Bending





Dilute dense flow transition
Dilute - Dense flow transition

K. To, P.-Y. Lai, H. K. Pak, Phys. Rev. Lett. 86, 71 (2001).

M. Hou, K. Lu, C.K. Chan, Phys. Rev. Lett.91, 204301 (2003).



Initial condition dependence
Initial Condition Dependence

Dilute

Dense

Dense

Dilute Flow

Dense Flow

Dilute

Dense

High Initial Flux

Low Initial Flux


Initial flux depends on packing
Initial Flux depends on Packing

Crystal pack

Loose pack

Huang D, Sun G, Lu K, Phys. Rev. E 74, 061306 (2006). c



Effective

Width

Increase

Stable

Heap


Stable heap
Stable Heap

N. Taberlet, etal, Phys. Rev. Lett. 91, 264301 (2003).




v

v


Optimization discussions
Optimization Discussions

  • 1. Adjust the main section width below the dilute-dense transition point

  • 2. Watch that no stable heap can develop in the main section

  • 3. In the bi-stable region, get a higher initial flux

  • 4. Increase outlet width D2, so that only turning A plays the role of bottleneck



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