Numerical investigation into the performance of alternative Knudsen pump designs

Bond, D. M., Wheatley, V. and Goldsworthy, M. (2016) Numerical investigation into the performance of alternative Knudsen pump designs. International Journal of Heat and Mass Transfer, 93 1038-1058. doi:10.1016/j.ijheatmasstransfer.2015.10.069

Author Bond, D. M.
Wheatley, V.
Goldsworthy, M.
Title Numerical investigation into the performance of alternative Knudsen pump designs
Journal name International Journal of Heat and Mass Transfer   Check publisher's open access policy
ISSN 0017-9310
Publication date 2016-02-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.ijheatmasstransfer.2015.10.069
Open Access Status Not Open Access
Volume 93
Start page 1038
End page 1058
Total pages 21
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Subject 3104 Condensed Matter Physics
2210 Mechanical Engineering
1507 Fluid Flow and Transfer Processes
Abstract Micro scale pumps that are driven by the thermal transpiration effect are commonly known as Knudsen pumps. The performance of three Knudsen pump designs is numerically determined for a range of rarefaction levels and geometries. A newly developed Knudsen pump, based on a sinusoidal variation in channel width, is compared to previous curved channel designs as well as the canonical Knudsen pump design. A second Knudsen pump design is introduced based on individual pumping elements arranged in a matrix that displays no adverse flow effects. Flow structure, mass flow rate and pressure differential generation ability are investigated for all designs. Mass flow rate and pressure differential characteristics are found to be greatest for the canonical and matrix pump designs respectively. The ability of the matrix pump to vector flow is also demonstrated by a nine-element pump placed at the confluence of four channels and displays the versatility of the design.
Keyword Knudsen pump
Rarefied gas
Thermal transpiration
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 02 Dec 2015, 19:59:31 EST by Dr Vincent Wheatley on behalf of School of Mechanical and Mining Engineering