Tuning magnetofluidic spreading in microchannels
Magnetofluidic spreading (MFS) is a phenomenon in which a uniform magnetic field is used to induce spreading of a ferrofluid core cladded by diamagnetic fluidic streams in a three-stream channel. Applications of MFS include micromixing, cell sorting and novel microfluidic lab-on-a-chip design. Howev...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2016
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/84121 http://hdl.handle.net/10220/41622 |
| _version_ | 1826128700640329728 |
|---|---|
| author | Wang, Zhaomeng Varma, Vijaykumar B. Wang, Zhi Ping Ramanujan, Raju Vijayaraghavan |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Wang, Zhaomeng Varma, Vijaykumar B. Wang, Zhi Ping Ramanujan, Raju Vijayaraghavan |
| author_sort | Wang, Zhaomeng |
| collection | NTU |
| description | Magnetofluidic spreading (MFS) is a phenomenon in which a uniform magnetic field is used to induce spreading of a ferrofluid core cladded by diamagnetic fluidic streams in a three-stream channel. Applications of MFS include micromixing, cell sorting and novel microfluidic lab-on-a-chip design. However, the relative importance of the parameters which govern MFS is still unclear, leading to non-optimal control of MFS. Hence, in this work, the effect of various key parameters on MFS was experimentally and numerically studied. Our multi-physics model, which combines magnetic and fluidic analysis, showed excellent agreement between theory and experiment. It was found that spreading was mainly due to cross-sectional convection induced by magnetic forces, and can be enhanced by tuning various parameters. Smaller flow rate ratio, higher magnetic field, higher core stream or lower cladding stream dynamic viscosity, and larger magnetic particle size can increase MFS. These results can be used to tune magnetofluidic spreading in microchannels. |
| first_indexed | 2024-10-01T07:29:13Z |
| format | Journal Article |
| id | ntu-10356/84121 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:29:13Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/841212020-06-01T10:26:44Z Tuning magnetofluidic spreading in microchannels Wang, Zhaomeng Varma, Vijaykumar B. Wang, Zhi Ping Ramanujan, Raju Vijayaraghavan School of Materials Science & Engineering A*STAR SIMTech Magnetic fields Microfluidics Magnetofluidic spreading (MFS) is a phenomenon in which a uniform magnetic field is used to induce spreading of a ferrofluid core cladded by diamagnetic fluidic streams in a three-stream channel. Applications of MFS include micromixing, cell sorting and novel microfluidic lab-on-a-chip design. However, the relative importance of the parameters which govern MFS is still unclear, leading to non-optimal control of MFS. Hence, in this work, the effect of various key parameters on MFS was experimentally and numerically studied. Our multi-physics model, which combines magnetic and fluidic analysis, showed excellent agreement between theory and experiment. It was found that spreading was mainly due to cross-sectional convection induced by magnetic forces, and can be enhanced by tuning various parameters. Smaller flow rate ratio, higher magnetic field, higher core stream or lower cladding stream dynamic viscosity, and larger magnetic particle size can increase MFS. These results can be used to tune magnetofluidic spreading in microchannels. ASTAR (Agency for Sci., Tech. and Research, S’pore) 2016-11-04T04:05:00Z 2019-12-06T15:38:46Z 2016-11-04T04:05:00Z 2019-12-06T15:38:46Z 2015 Journal Article Wang, Z., Varma, V. B., Wang, Z. P., & Ramanujan, R. V. (2015). Tuning magnetofluidic spreading in microchannels. Journal of Micromechanics and Microengineering, 25(12), 124001-. 0960-1317 https://hdl.handle.net/10356/84121 http://hdl.handle.net/10220/41622 10.1088/0960-1317/25/12/124001 en Journal of Micromechanics and Microengineering © 2015 IOP Publishing Ltd. |
| spellingShingle | Magnetic fields Microfluidics Wang, Zhaomeng Varma, Vijaykumar B. Wang, Zhi Ping Ramanujan, Raju Vijayaraghavan Tuning magnetofluidic spreading in microchannels |
| title | Tuning magnetofluidic spreading in microchannels |
| title_full | Tuning magnetofluidic spreading in microchannels |
| title_fullStr | Tuning magnetofluidic spreading in microchannels |
| title_full_unstemmed | Tuning magnetofluidic spreading in microchannels |
| title_short | Tuning magnetofluidic spreading in microchannels |
| title_sort | tuning magnetofluidic spreading in microchannels |
| topic | Magnetic fields Microfluidics |
| url | https://hdl.handle.net/10356/84121 http://hdl.handle.net/10220/41622 |
| work_keys_str_mv | AT wangzhaomeng tuningmagnetofluidicspreadinginmicrochannels AT varmavijaykumarb tuningmagnetofluidicspreadinginmicrochannels AT wangzhiping tuningmagnetofluidicspreadinginmicrochannels AT ramanujanrajuvijayaraghavan tuningmagnetofluidicspreadinginmicrochannels |