The Richtmyer-Meshkov instability is experimentally investigated in a vertical shock tube using a new type of broadband initial condition imposed on an interface between a helium-acetone mixture and argon (A = 0.7). The initial condition is created by first setting up a gravitationally stable stagnation plane between the gases and then injecting the same two gases horizontally at the interface to create a shear layer. The perturbations along the shear layer create a statistically repeatable broadband initial condition. The interface is accelerated by a M = 1.6 planar shock wave, and the development of the ensuing turbulent mixing layer is investigated using planar laser induced fluorescence. By the latest experimental time, 2.1 ms after shock acceleration, the layer is shown to be fully turbulent, surpassing both turbulent transition criteria based on the Reynolds number and shear layer scale. Mixing structures are nearly isotropic by the latest time, as seen by the probability density function of gradient angles within the mixing layer. The scalar variance energy spectrum suggests a k−5/3 inertial range by the latest time and an exponential region at higher wavenumbers.
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July 2012
Research Article|
July 12 2012
Turbulent mixing measurements in the Richtmyer-Meshkov instability Available to Purchase
Christopher Weber;
Christopher Weber
1Department of Engineering Physics,
University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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Nicholas Haehn;
Nicholas Haehn
1Department of Engineering Physics,
University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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Jason Oakley;
Jason Oakley
1Department of Engineering Physics,
University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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David Rothamer;
David Rothamer
2Department of Mechanical Engineering,
University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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Riccardo Bonazza
Riccardo Bonazza
a)
1Department of Engineering Physics,
University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
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Christopher Weber
1
Nicholas Haehn
1
Jason Oakley
1
David Rothamer
2
Riccardo Bonazza
1,a)
1Department of Engineering Physics,
University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
2Department of Mechanical Engineering,
University of Wisconsin-Madison
, Madison, Wisconsin 53706, USA
a)
Electronic mail: [email protected]. URL: http://silver.neep.wisc.edu/∼shock/.
Physics of Fluids 24, 074105 (2012)
Article history
Received:
December 15 2011
Accepted:
June 19 2012
Citation
Christopher Weber, Nicholas Haehn, Jason Oakley, David Rothamer, Riccardo Bonazza; Turbulent mixing measurements in the Richtmyer-Meshkov instability. Physics of Fluids 1 July 2012; 24 (7): 074105. https://doi.org/10.1063/1.4733447
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