Modeling gas flow through microchannels and nanopores

Journal of Applied Physics - Tập 93 Số 8 - Trang 4870-4879 - 2003
Subrata Roy1, Reni Raju1, Helen F. Chuang2, Brett A. Cruden2, M. Meyyappan2
1Computational Plasma Dynamics Laboratory, Department of Mechanical Engineering Kettering University, Flint, Michigan 48504
2Center for Nanotechnology, NASA Ames Research Center, Moffett Field, California 94035

Tóm tắt

Microchannel based systems have emerged as a critical design trend in development of precise control and maneuvering of small devices. In microelectronics, space propulsion and biomedical areas, these systems are especially useful. Nanoscale pores are recently becoming of great interest due to their beneficial drag and heat transfer properties. However it is difficult to predict the flow performance of these microsystems and nanosystems numerically since the standard assumptions of using Navier–Stokes equations break down at micrometer scales, while the computational times of applicable molecular-dynamics codes become exorbitant. A two-dimensional finite-element based microscale flow model is developed to efficiently predict the overall flow characteristics up to the transition regime for reasonably high Knudsen number flow inside microchannels and nanopores. Presented two-dimensional numerical results for Poiseuille flow of a simple fluid through the microchannel are comparable to the numerical and experimental data published in the literature. The nanopore solutions are also validated with presented experimental data.

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Thông tin xuất bản

Journal of Applied Physics

Tập 93 Số 8

4870-4879

Thông tin tác giả