黏性、表面张力和磁场对Rayleigh-Taylor不稳定性气泡演化影响的理论分析

李源; 罗喜胜

doi:10.7498/aps.63.085203

摘要

采用理论分析的方法考察了磁场中非理想流体中Rayleigh-Taylor（RT）不稳定性气泡的演化过程. 在与磁场垂直的平面中，综合考虑流体黏性和表面张力的影响，推导了二维非理想磁流体RT不稳定性气泡运动的控制方程组，给出了不同情况下气泡速度的渐近解和数值解，分析了流体黏性、表面张力和磁场对气泡发展的影响. 分析结果表明：流体黏性和表面张力能够降低气泡速度和振幅，即能够抑制RT不稳定性；而磁场对RT不稳定性的影响是由非线性部分引起的，并且磁场非线性部分的方向决定了磁场是促进还是抑制RT 不稳定性的发展.

关键词:

Abstract

The evolution of bubble in Rayleigh-Taylor (RT) instability for non-ideal hydromagnetic fluid is investigated theoretically in this study. In a plane perpendicular to the magnetic field, the general governing equation describing the bubble evolution is derived by considering the influences of viscousity, surface tension and magnetic field. The numerical and asymptotic solutions of the bubble velocity in two-dimensional planar geometry are obtained under different conditions and the effects of fluid viscosity, surface tension and magnetic field on the bubble growth are then analyzed in detail. It is found that the bubble velocity is reduced by viscosity and surface tension, which indicates that viscosity and surface tension can suppress the RT instability. It is also observed that the influence of magnetic field on the RT instability is caused by its nonlinear part, and whether the RT instability can be suppressed or enhanced depends on the direction of the nonlinear part of magnetic field.

Keywords:

作者及机构信息

李源,
罗喜胜

1.
中国科学技术大学近代力学系, 先进推进实验室, 合肥 230026

Authors and contacts

1.
Advanced Propulsion Laboratory, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China

参考文献

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施引文献

[1]	Taylor G I 1950 Proc. R. Soc. London A 201 192
[2]	Kilkenny J D, Glendinning S G, Haan S W, Hammel B A, Lindl J D, Munro D, Verdon C P 1994 Phys. Plasmas 1 1379
[3]
[4]	Cabot W H, Cook A W 2006 Nature Phys. 2 562
[5]
[6]
[7]	Rayleigh L 1900 Scientific Papers (Vol. 2) (Cambridge: Cambridge University Press) pp200-207
[8]
[9]	Chandrasekhar S 1961 Hydrodynamic and Hydromagnetic Stability (Oxford: Clarendon Press) pp441-453
[10]
[11]	Zhang W L, Wu Z W, Li D 2005 Phys. Plasmas 12 042106
[12]
[13]	Layzer D 1955 Astrophys. J. 122 1
[14]
[15]	Zufiria J 1998 Phys. Fluids 31 440
[16]
[17]	Goncharov V N 2002 Phys. Rev. Lett. 88 134502
[18]	Sohn S I 2004 Phys. Rev. E 70 045301
[19]
[20]	Tao Y S, Wang L F, Ye W H, Zhang G C, Zhang T C, Zhang J C, Li Y J 2012 Acta Phys. Sin. 61 075207 (in Chinese) [陶烨晟, 王立峰, 叶文华, 张广财, 张天才, 张建成, 李英骏 2012 物理学报 61 075207]
[21]
[22]	Banerjee R, Mandal L, Khan M, Gupta M R 2013 Indian J. Phys. 87 929
[23]
[24]
[25]	Sohn S I 2009 Phys. Rev. E 80 055302(R)
[26]	Gupta M R, Banerjee R, Mandal L K, Bhar R, Pant H C, Khan M, Srivastava M K 2012 Indian J. Phys. 86 471
[27]
[28]
[29]	Huo X H, Wang L F, Tao Y S, Li Y J 2013 Acta Phys. Sin. 62 144705 (in Chinese) [霍新贺, 王立峰, 陶烨晟, 李英骏 2013 物理学报 62 144705]
[30]
[31]	Cao Y G, Guo H Z, Zhang Z F, Sun Z H, Chow W K 2011 J. Phys. A: Math. Theor. 44 275501
[32]	Xia T J, Dong Y Q, Cao Y G 2013 Acta Phys. Sin. 62 214702 (in Chinese) [夏同军, 董永强, 曹义刚 2013 物理学报 62 214702]
[33]
[34]	Khan M, Mandal L, Banerjee R, Roy S, Gupta M R 2011 Nuclear Instruments and Methods in Physics Research A 653 2
[35]
[36]	Gupta M R, Mandal L, Roy S, Khan M 2010 Phys. Plasmas 17 012306
[37]

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