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hydrogen layer
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  hydrogen layer
The results of investigations of the evolution of the shape of the equipotentially charged surface of a liquid hydrogen layer in the external electric field in the case when the effective gravitation acceleration is near to zero are presented.
      
A review of the results is presented, emphasizing the strengths and limitations of the use of solid hydrogen layer targets.
      
Emission of low energy pμ atoms from the hydrogen layer into adjacent vacuum was much higher than expected, based on calculations which ignored the solid nature of hydrogen.
      
Emission of muonic tritium from a solid hydrogen layer has been studied via imaging of the muon-decay electrons and the time-of-flight distributions have been compared with detailed Monte Carlo calculations.
      
The μd can drift almost freely through the hydrogen layer due to the Ramsauer-Townsend effect and may even leave the layer.
      
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When the C_7H_(16) was solubilized in the CTMAB / C_5H_(11)OH / H_2O system lamellar liquid crystal, the ability of formation and the stabilization of lamellar liquid crystal decreased and d_0 value increased, but the variational tendency for penetration of solvent and the interlayer spacing with weight ratio CTMAB/C_5H_(11)OH were not change. These results showcd that C_6H_7 was solubilized in the carbon-hydrogen layer of lamellar liquid crystal.

CTMAB/C_5H_(11)OH/H_2O体系层状液晶增溶C_7H_(16)后,层状液晶的生成能力及其稳定性皆降低,两亲双层厚度d_0增加,但溶剂渗透率和层间距d随重量比CTMAB/C_5H_(11)OH的变化趋势皆不变,这些结果表明,C_7H_(16)是被增溶在层状液晶两亲双层结构的碳氢层内。

The process of hydrogen diffusion in a nuclear reactor containment has been investigated which is of great importancc for fire safety applications of nuclear systems.The three dimensional unsteady mathematical model in cylindrical coordinate system has been used to describe the hydrogen diffusion process in a nuclear reactor containment with blocked computational domain.The k ε two equation turbulence modelling has been used with the correction of buoyancy effects,and the method of porosity has been adopted...

The process of hydrogen diffusion in a nuclear reactor containment has been investigated which is of great importancc for fire safety applications of nuclear systems.The three dimensional unsteady mathematical model in cylindrical coordinate system has been used to describe the hydrogen diffusion process in a nuclear reactor containment with blocked computational domain.The k ε two equation turbulence modelling has been used with the correction of buoyancy effects,and the method of porosity has been adopted to treat the irregular geometry within the computational domain.The numerical results show that,on the driven of buoyancy,the hydrogen in the bottom of the containment moves upwards and gradually accumulates over the top of the containment,and at last,a hydrogen layer is formed.The results given in this paper include velocity vector plots.

研究了对核能系统火灾安全具有重要意义的核动力装置安全壳内氢气的扩散传播过程。采用圆柱坐标下的三维非稳态数学模型研究了含阻挡物的半圆柱体形密闭壳体下部氢气在浮力作用下的运动过程。其中采用了一种考虑浮力修正的kε双方程湍流模型,并且使用圆柱坐标系下的空度方法来处理计算区域的阻挡物。数值模拟的结果表明:由安全壳下部向上运动的氢气在初始动量及浮力的驱动下,逐渐在壳体顶部积累,形成氢气层。计算结果中给出了速度矢量的分布图

It has been shown that the Young\|Laplace equation based on the balance of the gravitational force and interfacial tension alone cannot produce a valid solution for the profile of a continuous liquid hydrogen layer inside an inertia confinement fusion capsule shell. In the calculated results, the London\|van der Waals forces between the liquid and solid (shell) molecules must be included in the equation. The retardation effect of the London\|van der Waals forces needs to be taken into account for thick...

It has been shown that the Young\|Laplace equation based on the balance of the gravitational force and interfacial tension alone cannot produce a valid solution for the profile of a continuous liquid hydrogen layer inside an inertia confinement fusion capsule shell. In the calculated results, the London\|van der Waals forces between the liquid and solid (shell) molecules must be included in the equation. The retardation effect of the London\|van der Waals forces needs to be taken into account for thick liquid hydrogen isotopes layers. It has been also shown that, in an isothermal environment, a continuous liquid hydrogen isotopes layer with a uniform thickness can only be achieved inside the capsule shell, such as the spherical glass when the gravity is zero or the London constant between the solid and liquid molecules is infinity.

叙述了低温等温情况下,重力和界面张力平衡的激光惯性约束聚变靶丸内表面液氢层分布的YoungLaplace(YL) 方程.为了得到靶丸壳内连续液氢层分布的有效解,考虑了液体与固体( 衬底) 分子间的Londonvan der Waals 力以及该力的迟滞影响.计算结果表明,只有在靶丸内部引力为零或者固体液体分子间的London 常量为无穷大时,才能得到等温环境中有均匀厚度的连续液氢层

 
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