Hostname: page-component-7b7567c8c-7pwfn Total loading time: 0 Render date: 2026-11-15T04:58:24.983Z Has data issue: false hasContentIssue false

Shock waves in microchannels

Published online by Cambridge University Press:  29 April 2013

G. Mirshekari
Affiliation:
Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, Quebec, Canada J1K 2R1
M. Brouillette*
Affiliation:
Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, Quebec, Canada J1K 2R1
J. Giordano
Affiliation:
IUSTI UMR 7343 CNRS – Aix Marseille Université, 5 rue Enrico Fermi, 13453 Marseille, France
C. Hébert
Affiliation:
Department of Mechanical Engineering, Université de Sherbrooke, Sherbrooke, Quebec, Canada J1K 2R1
J.-D. Parisse
Affiliation:
IUSTI UMR 7343 CNRS – Aix Marseille Université, 5 rue Enrico Fermi, 13453 Marseille, France
P. Perrier
Affiliation:
IUSTI UMR 7343 CNRS – Aix Marseille Université, 5 rue Enrico Fermi, 13453 Marseille, France
*
†Email address for correspondence: Martin.Brouillette@USherbrooke.ca
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

A fully instrumented microscale shock tube, believed to be the smallest to date, has been fabricated and tested. This facility is used to study the transmission of a shock wave, produced in a large (37 mm) shock tube, into a 34  $\mathrm{\mu} \mathrm{m} $ hydraulic diameter and 2 mm long microchannel. Pressure microsensors of a novel design, with gigahertz bandwidth, are used to obtain pressure–time histories of the microchannel shock wave at five axial stations. In all cases the transmitted shock wave is found to be weaker than the incident shock wave, and is observed to decay both in pressure and velocity as it propagates down the microchannel. These results are compared with various analytical and numerical models, and the best agreement is obtained with a Navier–Stokes computational fluid dynamics computation, which assumes a no-slip isothermal wall boundary condition; good agreement is also obtained with a simple shock tube laminar boundary layer model. It is also found that the flow developing within the microchannel is highly dependent on conditions at the microchannel entrance, which control the mass flux entering into the device. Regardless of the micrometre dimensions of the present facility, shock wave propagation in a microchannel of that scale exhibits a behaviour similar to that observed in large-scale facilities operated at low pressures, and the shock attenuation can be explained in terms of accepted laminar boundary models.

Information

Type
Papers
Copyright
©2013 Cambridge University Press