Generation of Dielectrophoretic Force under Uniform Electric Field
Effective dipole moment method has been widely accepted as the de facto technique in predicting the dielectrophoretic force due to the non-uniform electric field. In this method, a finite-particle is modeled as an equivalent point-dipole that would induce a same electric field under the external ele...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2005
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| Online Access: | http://hdl.handle.net/1721.1/29834 |
| _version_ | 1811084100950294528 |
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| author | Kua, C.H. Yang, C. Goh, S. Isabel, R. Youcef-Toumi, Kamal Lam, Yee Cheong |
| author_facet | Kua, C.H. Yang, C. Goh, S. Isabel, R. Youcef-Toumi, Kamal Lam, Yee Cheong |
| author_sort | Kua, C.H. |
| collection | MIT |
| description | Effective dipole moment method has been widely accepted as the de facto technique in predicting the dielectrophoretic force due to the non-uniform electric field. In this method, a finite-particle is modeled as an equivalent point-dipole that would induce a same electric field under the external electric field. This approach is only valid when the particle size is significantly smaller than the characteristic length of interest. This assumption is often violated in a microfluidic device, where the thickness or width of the microchannel can be as small as the particle. It is shown in this numerical study that when the dimensions of the particle were in the same order of magnitude as the characteristic length of the device, dielectrophoretic force can be induced even in a uniform electric field. This force arises due to the disturbance of the particle and the bounding wall. |
| first_indexed | 2024-09-23T12:44:50Z |
| format | Article |
| id | mit-1721.1/29834 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:44:50Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | mit-1721.1/298342019-04-12T07:24:07Z Generation of Dielectrophoretic Force under Uniform Electric Field Kua, C.H. Yang, C. Goh, S. Isabel, R. Youcef-Toumi, Kamal Lam, Yee Cheong electrostatic force dipole moment dielectrophoresis Effective dipole moment method has been widely accepted as the de facto technique in predicting the dielectrophoretic force due to the non-uniform electric field. In this method, a finite-particle is modeled as an equivalent point-dipole that would induce a same electric field under the external electric field. This approach is only valid when the particle size is significantly smaller than the characteristic length of interest. This assumption is often violated in a microfluidic device, where the thickness or width of the microchannel can be as small as the particle. It is shown in this numerical study that when the dimensions of the particle were in the same order of magnitude as the characteristic length of the device, dielectrophoretic force can be induced even in a uniform electric field. This force arises due to the disturbance of the particle and the bounding wall. Singapore-MIT Alliance (SMA) 2005-12-13T17:43:20Z 2005-12-13T17:43:20Z 2006-01 Article http://hdl.handle.net/1721.1/29834 en Innovation in Manufacturing Systems and Technology (IMST) 59376 bytes application/pdf application/pdf |
| spellingShingle | electrostatic force dipole moment dielectrophoresis Kua, C.H. Yang, C. Goh, S. Isabel, R. Youcef-Toumi, Kamal Lam, Yee Cheong Generation of Dielectrophoretic Force under Uniform Electric Field |
| title | Generation of Dielectrophoretic Force under Uniform Electric Field |
| title_full | Generation of Dielectrophoretic Force under Uniform Electric Field |
| title_fullStr | Generation of Dielectrophoretic Force under Uniform Electric Field |
| title_full_unstemmed | Generation of Dielectrophoretic Force under Uniform Electric Field |
| title_short | Generation of Dielectrophoretic Force under Uniform Electric Field |
| title_sort | generation of dielectrophoretic force under uniform electric field |
| topic | electrostatic force dipole moment dielectrophoresis |
| url | http://hdl.handle.net/1721.1/29834 |
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