SIMULATION OF GAS FLOW IN MICROTUBES BY LATTICE BOLTZMANN METHOD

Haibo Huang () and Xi-Yun Lu
Additional contact information
Haibo Huang: Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China
Xi-Yun Lu: Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China

International Journal of Modern Physics C (IJMPC), 2009, vol. 20, issue 08, 1145-1153

Abstract: Isothermal gas flow in microtubes with a sudden expansion or contraction is studied numerically by lattice Boltzmann method. An axisymmetric D2Q9 model is used to simulate gas slip flow in micro-circular pipes. With the boundary condition combined specular and bounce-back schemes, the computed results are in excellent agreement with analytical solution for straight microtube. For the gas flow in the expanded or constricted tubes, we carried out simulations of several Knudsen numbers with inlet/outlet pressure ratio 3. It is found the pressure drop in each section can be predicted well by the theory of straight tubes. For smaller Knudsen number, flow separation in the expanded tube is observed. While for large Knudsen number, there is no vortex at corner and the streamlines are attached to boundary. In the constricted tube, the vortex at corner is very weak. These results are consistent with some experimental conclusions.

Keywords: Lattice Boltzmann; slip flow; microtube; microfluidics; Knudsen numbeer (search for similar items in EconPapers)
Date: 2009
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0129183109014266
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:ijmpcx:v:20:y:2009:i:08:n:s0129183109014266

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0129183109014266

Access Statistics for this article

International Journal of Modern Physics C (IJMPC) is currently edited by H. J. Herrmann

More articles in International Journal of Modern Physics C (IJMPC) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().