瑞利数对对流扰动成长和对流斑图的影响

Influence of Rayleigh Number on Growth of Perturbation and Convective Patterns

通过2维扰动方程的数值模拟,探讨了分离比ψ=-0.6的对流发展情况.在长高比Γ_x=30情况下,系统首先发展成线性成长阶段,然后随着小扰动的成长系统发展成复杂的对流斑图.在向有缺陷的行波过渡的过程中,随着相对瑞利数r增加,对传波和具有缺陷的行波都形成的较早.对于不同的相对瑞利数r,系统最终都没有形成以中心为对称的具有缺陷的行波.讨论了其动力学特性.

Using the numerical simulations of the two-dimensional full perturbation equations of hydrodynamics, the convection development of separation ratio ψ=-0.6 is discussed. At large aspect-ratio Гx=30, the system first develops into a linear growth stage and then develops into a complex pattern with the growth of small disturbance. In the transition process of the traveling wave with defect, the traveling wave and the traveling wave with defect are early formed with the increase of the reduced Rayleigh number r. For different reduced Rayleigh numbers r, the system does dynamic behavior is discussed. not form a traveling wave with defect with a central symmetry. The