首页|Growth of ablative Rayleigh-Taylor instability induced by time-varying heat-flux perturbation

Growth of ablative Rayleigh-Taylor instability induced by time-varying heat-flux perturbation

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The evolution of ablative Rayleigh-Taylor instability(ARTI)induced by single-mode stationary and time-varying perturbations in heat flux is studied numerically in two dimensions.Compared with the stationary case,time-varying heat-flux perturbation mitigates ARTI growth because of the enhanced thermal smoothing induced by the wave-like traveling heat flux.A resonance is found to form when the phase velocity of the heat-flux perturbation matches the average sound speed in the ablation region.In the resonant regime,the coherent density and temperature fluctuations enhance the electron thermal conduction in the ablation region and lead to larger ablation pressure and effective acceleration,which consequently yield higher linear growth rate and saturated bubble velocity.The enhanced effective acceleration offers increased implosion velocity but can also compromise the integrity of inertial confinement fusion shells by causing faster ARTI growth.

Yang Liu、De-Hua Zhang、Jing-Fei Xin、Yudong Pu、Jun Li、Tao Tao、Dejun Sun、Rui Yan、Jian Zheng

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Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026,China

Deep Space Exploration Laboratory,Hefei 230026,China

Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,China

Institute of Applied Physics and Computational Mathematics,Beijing 100094,China

Department of Plasma Physics and Fusion Engineering,University of Science and Technology of China,Hefei,Anhui 230026,China

Collaborative Innovation Center of IFSA(CICIFSA),Shanghai Jiao Tong University,Shanghai 200240,China

CAS Center for Excellence in Ultra-intense Laser Science,Shanghai 201800,China

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中国科学院战略规划重点项目中国科学院战略规划重点项目国家自然科学基金国家自然科学基金Frontier Scientific Research Program of the Deep Space Exploration Laboratory中央高校基本科研业务费专项

XDA25050400XDA2501020012175229123881012022-QYKYJH-HXYF-019

2024

10.1063/5.0157344

极端条件下的物质与辐射(英文)
中国工程物理研究院科技信息中心

极端条件下的物质与辐射(英文)

ISSN：2468-2047
年,卷(期)：2024.9(1)
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