非理想情况下磁化球形重质气体物理爆炸的数值模拟

发布时间：2018-05-19 12:35

  本文选题：不稳定性 + 爆炸　； 参考：《爆炸与冲击》2017年03期

【摘要】：采用磁流体力学(magnetohydrodynamics,MHD)方程组对非理想情况下磁场对球形重质气体物理爆炸的作用过程进行数值模拟,同时,为了保证每一步中磁场散度为零,引入由12-solve CTU算法衍生出的CTU+CT算法。结果清晰地显示了重质气体团在磁场影响下的整个爆炸过程。在非理想情况下,爆炸过程中气体团界面产生液滴状结构,随着气体团被压缩,不稳定性现象最终得到抑制。从结果中看出,电阻和双极扩散效应会阻碍磁场对气体团的作用,同时,双极扩散效应还会增大磁压力的作用范围。
[Abstract]:The magnetohydrodynamic (MHD) equations are used to simulate the effect of magnetic field on the physical explosion of spherical heavy gas under non-ideal conditions. In order to ensure that the magnetic field divergence is zero in each step, the CTU CT algorithm derived from the 12-solve CTU algorithm is introduced. The results clearly show the whole explosion process of the heavy gas mass under the influence of magnetic field. In the non-ideal case, the gas cluster interface produces droplet structure during explosion, and the instability is finally suppressed with the compression of the gas mass. It can be seen from the results that resistance and bipolar diffusion effect will hinder the effect of magnetic field on the gas cluster, and at the same time, the bipolar diffusion effect will increase the range of action of magnetic pressure.
【作者单位】： 南京理工大学瞬态物理国家重点实验室;解放军装备学院激光推进及应用国家重点实验室;
【基金】：国家自然科学基金项目(11272156)
【分类号】：O381
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本文编号：1910119