Dissipative particle dynamics (DPD) is a mesoscopic particle-based simulation method, where each particle represents a group or packet of actual molecules of the flow field. Despite its usefulness, a fundamental problem of the DPD is that there is no straightforward procedure to relate the soft-particle model to a realistic continuum or molecular model. In the present work, we studied the dynamics of a simple fluid flow in a microchannel based on the coarse-graining of the molecules and expressed DPD units in terms of real units. To compare DPD methodology with continuum theory, a relation between the viscosity of the fluid and dissipative coefficient of DPD was established. DPD equations and parameters were expressed in non-dimensional forms and related to the known hydrodynamic parameters such as Reynolds number and Peclet number. Poiseuille flow of water in microchannel of height 35 μm was modeled for different parameters. Coarse-graining for water was ranged from 5×109 to 5×1010 for each DPD particle. Re and Pe of the flow were varied from 0.7 to 60 and 5 to 140, respectively. Simulated results were compared to the continuum results with a good agreement.
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ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels
June 23–25, 2008
Darmstadt, Germany
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4834-5
PROCEEDINGS PAPER
Mesoscopic Simulations of Flow in Microchannel and Comparison With Continuum Model Available to Purchase
Anurag Kumar,
Anurag Kumar
University of Rhode Island, Kingston, RI
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Yutaka Asako,
Yutaka Asako
Tokyo Metropolitan University, Tokyo, Japan
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Mohammad Faghri
Mohammad Faghri
University of Rhode Island, Kingston, RI
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Anurag Kumar
University of Rhode Island, Kingston, RI
Yutaka Asako
Tokyo Metropolitan University, Tokyo, Japan
Mohammad Faghri
University of Rhode Island, Kingston, RI
Paper No:
ICNMM2008-62280, pp. 977-983; 7 pages
Published Online:
June 11, 2009
Citation
Kumar, A, Asako, Y, & Faghri, M. "Mesoscopic Simulations of Flow in Microchannel and Comparison With Continuum Model." Proceedings of the ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. Darmstadt, Germany. June 23–25, 2008. pp. 977-983. ASME. https://doi.org/10.1115/ICNMM2008-62280
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