| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Effects of a Premixed Layer on the Richtmyer–Meshkov Instability |
| TIAN Bao-Lin1, ZHANG Xin-Ting2, QI Jin1**, WANG Shuang-Hu1
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1Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100094
2Ecole Centrale de Pekin, Beihang University, Beijing 100191
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| Cite this article: |
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TIAN Bao-Lin, ZHANG Xin-Ting, QI Jin et al 2011 Chin. Phys. Lett. 28 114701 |
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Abstract The effects of a premixed layer on the Richmyer–Meshkov instability (RMI) are studied by setting a density gradient for the first shocked fluid in the RMI problems. The RMI with initial density gradients are simulated by using a high resolution arbitrary Lagrangian–Eulerian method. The effects of density gradient and gradient width are analyzed on the basis of the simulation results for the shock from a light fluid to a heavy fluid and for the shock from a heavy fluid to a light fluid. Overall, the premixed layer can suppress the perturbation growth, and the detailed effects are different depending on the detailed premixed configuration. The width of the premixed layer has a very light influence on the perturbation, while the density gradient has quite a significant effect on two kinds of RMIs.
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| Keywords:
47.20.Ma
47.40.-x
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Received: 02 July 2011
Published: 30 October 2011
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| PACS: |
47.20.Ma
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(Interfacial instabilities (e.g., Rayleigh-Taylor))
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47.40.-x
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(Compressible flows; shock waves)
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