论文标题
计算流体动力学方法，用于理解振荡和相互作用的对流流
Computational fluid dynamics approach for understanding oscillating and interacting convective flows
论文作者
论文摘要
考虑了一种2D数值流体动力学方法，用于建模有关对流流的振荡和集体行为的最新实验结果。我们的模拟考虑了引力场中加热流体柱的动力学增加。模拟是在两个完全不同的长度尺度上进行的，还显示了所研究现象的一般性。对于单个加热流体柱的流动，研究了流入率和喷嘴直径的影响。与实验一致，对于恒定的喷嘴直径，振荡频率随着流量产量的函数而近似线性增加，而对于恒定流量，频率随着喷嘴直径的增加而随着功率定律而降低。关于附近两个流的集体行为，我们发现振荡的反相同步以及当流量之间的距离降低时，公共振荡频率的趋势增加。这些结果再次与实验结果一致。
A 2D numerical hydrodynamics approach is considered for modelling recent experimental results on the oscillation and collective behavior of convective flows. Our simulations consider the rising dynamics of heated fluid columns in a gravitational field. Simulations are done on two entirely different length-scales, showing also the generality of the investigated phenomena. For the flow of a single heated fluid column, the effect of the inflow yield and the nozzle diameter is studied. In agreement with the experiments, for a constant nozzle diameter the oscillation frequency increases approximately linearly as a function of the the flow yield and for a constant flow yield the frequency decreases as a power law with the increasing nozzle diameter. Concerning the collective behavior of two nearby flow we find a counter-phase synchronization of the oscillations and an increasing trend in the common oscillation frequency when the distance between the flows is decreased. These results are again in agreement with the experimental findings.
