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1.
Zaixing Huang 《International Journal of Non》2004,39(6):951-962
In this paper, a general framework of continuum theory for a growing deformable body is established. Firstly, the so-called material accretion derivative is defined. Based on this definition, a general form of the equilibrium equation and its growing boundary condition describing motion of the growing deformable body are deduced in detail. From the process of deduction, the concept of coupling function of growth is derived, which reflects the influence of the accretive boundary surface. Then, the equilibrium equations, including the equation of mass, momentum, moment of momentum and energy, are discussed. Also, the entropy inequality is given according to the assumption of local equilibrium of non-equilibrium thermodynamics. In the meantime, the related constitutive equations are deduced. All these equations constitute a group of closed equations characterizing the growth and motion of the body. 相似文献
2.
壁面定常波纹状吹吸槽道流中湍流特性的研究 总被引:1,自引:0,他引:1
在非平衡湍流中,如具有周期性边界条件的流动,由于雷诺应力与平均流速的变形率有着
不同的性质,当周期性边界条件发生变化时,雷诺应力和平均流速变形率的相位对边界条件
的响应也不同,但是二者的相位差在相当大的范围内是稳定的. 这一特性加深了对雷诺应力
的认识,并对非平衡湍流中的模式理论及大涡模拟中亚格子雷诺应力模式的建立提出了许多
需要注意的问题. 利用层流模型,把空间周期性边界条件作为某种扰动,研究了扰动
及其非线性项的分布以及相位间的关系,得到了一些有益的结果. 相似文献
3.