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| Title: | Effect of relative particle size on large particle detachment from a microchannel |
| Author (s): | Shukla, Nimisha Henthorn, Kimberly |
| Department/Lab Affiliations: | Chemical & Biological Engineering Environmental Research Center |
| Keywords: | PDMS adhesion detachment particle |
| Issue Date: | 2009-04 |
| Publisher: | Springer Verlag |
| Citation: | Shukla, Nimisha and Kimberly H. Henthorn. "Effect of Relative Particle Size on Large Particle Detachment from a Microchannel" Microfluidics Nanofluidis, Vol. 6, No. 4, (April 2009): 521-527. |
| Abstract: | The detachment of a single rigid sphere in a cylindrical PDMS microchannel has been investigated for systems where the particle occupies greater than 50% of the channel cross-sectional area. The fluid velocity required to detach a particle adhering to a microchannel wall is a function of many variables; however, only the effect of particle size is considered in this paper. Experiments were performed for Reynolds numbers less than 0.1, and the ratio of particle diameter, d p, to channel dimension, D, was varied from 0.50 to 0.95 in a 230 μm channel. A nonionic surfactant (Tween 80) was used to minimize the effect of adhesive forces other than van der Waals forces. In addition, a simple force-balance model based on particle lift, buoyancy, drag, gravitational forces, and adhesion due to van der Waals forces has been developed to predict the velocity required for particle detachment. The predicted and experimentally measured velocities agree relatively well within the limit of experimental error. The detachment velocity was qualitatively found to increase with decreasing d(p) /D. |
| Type: | Article - Journal text |
| In Title: | Microfluidics and Nanofluidics |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Pre-print: author can archive; Post-print: author can archive; FULL COPYRIGHT INFORMATION: |
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| title | Effect of relative particle size on large particle detachment from a microchannel |
| contributor.author | Shukla, Nimisha |
| contributor.author | Henthorn, Kimberly |
| contributor.deptlab | Chemical & Biological Engineering |
| contributor.deptlab | Environmental Research Center |
| contributor.sponsor | University of Missouri Research Board |
| subject | PDMS |
| subject | adhesion |
| subject | detachment |
| subject | particle |
| date.issued | 2009-04 |
| publisher | Springer Verlag |
| identifier.citation | Shukla, Nimisha and Kimberly H. Henthorn. "Effect of Relative Particle Size on Large Particle Detachment from a Microchannel" Microfluidics Nanofluidis, Vol. 6, No. 4, (April 2009): 521-527. |
| identifier.pub.URI | |
| description.abstract | The detachment of a single rigid sphere in a cylindrical PDMS microchannel has been investigated for systems where the particle occupies greater than 50% of the channel cross-sectional area. The fluid velocity required to detach a particle adhering to a microchannel wall is a function of many variables; however, only the effect of particle size is considered in this paper. Experiments were performed for Reynolds numbers less than 0.1, and the ratio of particle diameter, d p, to channel dimension, D, was varied from 0.50 to 0.95 in a 230 μm channel. A nonionic surfactant (Tween 80) was used to minimize the effect of adhesive forces other than van der Waals forces. In addition, a simple force-balance model based on particle lift, buoyancy, drag, gravitational forces, and adhesion due to van der Waals forces has been developed to predict the velocity required for particle detachment. The predicted and experimentally measured velocities agree relatively well within the limit of experimental error. The detachment velocity was qualitatively found to increase with decreasing d(p) /D. |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Postprint |
| relation.isPartOf | Microfluidics and Nanofluidics |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights | Pre-print: author can archive; Post-print: author can archive; |
| rights.URI | |
| rights.URI | |
| identifier.persist.URI | |
| date.available | 2009-05-06T17:24:23Z |