A numerical and experimental study of the time-evolution of a low Mach number jet |
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| Authors: | A Raga H Sobral M Villagrán-Muniz R Navarro-González E Masciadri |
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| Institution: | Instituto de Astronomía, UNAM, Ap. 70-264, 04510 DF, Mexico; Centro de Instrumentos, UNAM, Ap. 70-186, 04510 DF, Mexico; Instituto de Ciencias Nucleares, Ap. 70-543, 04510 DF, Mexico |
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| Abstract: | We present a comparison between a plasma-generated 'starting jet' experiment and an axisymmetric numerical simulation of the flow. The experimental flow and the numerical simulation give results that agree both qualitatively and quantitatively, showing that the complex vortical structures arising in the flow are surprisingly well reproduced by the numerical model. This result inspires confidence in the accuracy of astrophysical jet numerical simulations. Also, even though the Mach number of our laboratory jet is somewhat low ( M ～0.5), the dimensionless parameters of this jet are not very far from those expected for Faranoff–Riley class I radio jets. |
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| Keywords: | hydrodynamics turbulence methods: laboratory methods: numerical galaxies: jets |
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