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Bubble velocity in the nonlinear Rayleigh–Taylor instability at a deflagration front
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View: Figures


Image of FIG. 1.
FIG. 1.

The configuration of a light bubble rising in heavy matter.

Image of FIG. 2.
FIG. 2.

Profiles of scaled density, temperature, and the rate of energy release for a planar deflagration front. Dashed lines illustrate the computational grid.

Image of FIG. 3.
FIG. 3.

Density (a) and vorticity (b) at the deflagration front, propagating upwards for , , acceleration points to the left, from heavy to light plasma. Vorticity changes from to , and it is almost zero in the heavy plasma.

Image of FIG. 4.
FIG. 4.

Scaled deflagration speed vs time for , 40, 160.

Image of FIG. 5.
FIG. 5.

Temperature distribution for stationary deflagration fronts at , 40, 160 for (a), (b), (c), respectively.

Image of FIG. 6.
FIG. 6.

The deflagration speed vs for , (filled squares), , (empty squares), and , (circles). The dashed line corresponds to the Layzer formula, Eqs. (35) and (2) for . The solid line represents Eq. (39). The triangle stands for the simulation results (Ref. 8), and crosses show the results of Ref. 23.

Image of FIG. 7.
FIG. 7.

Scaled maximal vorticity in the light plasma vs scaled gravitational acceleration. The dashed and solid lines correspond to Eqs. (41) and (42), respectively. The empty markers indicate the simulation runs, for which bubble dynamics becomes nonstationary.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Bubble velocity in the nonlinear Rayleigh–Taylor instability at a deflagration front