### Abstract

Microchannel blockage phenomena by hard, spherical particles have been investigated experimentally and theoretically. The study was performed over a range of particle-to-channel diameter ratios of 0.14 < R < 0.65. Two mechanisms have been investigated: orthokinetic flocculation and hydrokinetic arching. Arching appears to be the main mechanism for large, hard particles. In the absence of Brownian motion and inter-particle repulsive forces, other than simple Hertzian contact force, the blockage phenomenon is described by three non-dimensional parameters, N, R and β. The mean total number of particles in the channel having length L is N. Ratio of a diameter of particle (d _{p}) and a diameter of channel (D) is R. Blockage efficiency factor β is determined experimentally. The data shows that a critical value N _{c} exists as a function of R. N > N _{c} implies high likelihood of blockage; if N < N _{c}, blockages were never observed. The critical number decreases dramatically with increasing R. Blockages can occur at surprisingly low values of the volume concentration (φ). The experimental results matches well with the theory for the combinations of straight glass capillary, 76<D<156μm, 100mm-length, and spherical polymer particle, 22>d _{p}<48μm.

Original language | English (US) |
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Title of host publication | International Conference on Microchannels and Minichannels |

Editors | S.G. Kandlikar |

Pages | 851-857 |

Number of pages | 7 |

Volume | 1 |

State | Published - 2003 |

Externally published | Yes |

Event | First International Conference on Microchannels and Minichannels - Rochester, NY, United States Duration: Apr 24 2003 → Apr 25 2003 |

### Other

Other | First International Conference on Microchannels and Minichannels |
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Country | United States |

City | Rochester, NY |

Period | 4/24/03 → 4/25/03 |

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### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*International Conference on Microchannels and Minichannels*(Vol. 1, pp. 851-857)

**Theoretical and experimental study of microchannel blockage phenomena.** / Yamaguchi, Eiichiro; Adrian, Ronald.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*International Conference on Microchannels and Minichannels.*vol. 1, pp. 851-857, First International Conference on Microchannels and Minichannels, Rochester, NY, United States, 4/24/03.

}

TY - GEN

T1 - Theoretical and experimental study of microchannel blockage phenomena

AU - Yamaguchi, Eiichiro

AU - Adrian, Ronald

PY - 2003

Y1 - 2003

N2 - Microchannel blockage phenomena by hard, spherical particles have been investigated experimentally and theoretically. The study was performed over a range of particle-to-channel diameter ratios of 0.14 < R < 0.65. Two mechanisms have been investigated: orthokinetic flocculation and hydrokinetic arching. Arching appears to be the main mechanism for large, hard particles. In the absence of Brownian motion and inter-particle repulsive forces, other than simple Hertzian contact force, the blockage phenomenon is described by three non-dimensional parameters, N, R and β. The mean total number of particles in the channel having length L is N. Ratio of a diameter of particle (d p) and a diameter of channel (D) is R. Blockage efficiency factor β is determined experimentally. The data shows that a critical value N c exists as a function of R. N > N c implies high likelihood of blockage; if N < N c, blockages were never observed. The critical number decreases dramatically with increasing R. Blockages can occur at surprisingly low values of the volume concentration (φ). The experimental results matches well with the theory for the combinations of straight glass capillary, 76<D<156μm, 100mm-length, and spherical polymer particle, 22>d p<48μm.

AB - Microchannel blockage phenomena by hard, spherical particles have been investigated experimentally and theoretically. The study was performed over a range of particle-to-channel diameter ratios of 0.14 < R < 0.65. Two mechanisms have been investigated: orthokinetic flocculation and hydrokinetic arching. Arching appears to be the main mechanism for large, hard particles. In the absence of Brownian motion and inter-particle repulsive forces, other than simple Hertzian contact force, the blockage phenomenon is described by three non-dimensional parameters, N, R and β. The mean total number of particles in the channel having length L is N. Ratio of a diameter of particle (d p) and a diameter of channel (D) is R. Blockage efficiency factor β is determined experimentally. The data shows that a critical value N c exists as a function of R. N > N c implies high likelihood of blockage; if N < N c, blockages were never observed. The critical number decreases dramatically with increasing R. Blockages can occur at surprisingly low values of the volume concentration (φ). The experimental results matches well with the theory for the combinations of straight glass capillary, 76<D<156μm, 100mm-length, and spherical polymer particle, 22>d p<48μm.

UR - http://www.scopus.com/inward/record.url?scp=1242286591&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1242286591&partnerID=8YFLogxK

M3 - Conference contribution

SN - 0791836673

SN - 9780791836675

VL - 1

SP - 851

EP - 857

BT - International Conference on Microchannels and Minichannels

A2 - Kandlikar, S.G.

ER -