Lagrangian and Eulerian models for simulating turbulent dispersion and coalescence of droplets within a spray
Lagrangian and Eulerian models for simulating turbulent dispersion and coalescence of droplets within a spray
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DOI：
10.1016/j.apm.2006.02.001
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发表时间：
2006-11
影响因子：
5
通讯作者：
J. Nijdam;B. Guo;David F. Fletcher;T. Langrish
中科院分区：
文献类型：
--
作者：
J. Nijdam;B. Guo;David F. Fletcher;T. Langrish
拉格朗日和欧拉建模方法进行了比较，模拟湍流分散和聚结液滴内的喷雾。这两种模型预测相似的液滴分散率和液滴尺寸分布的变化，由于在喷雾内的聚结，在很宽的范围内的液滴和气体流量，并在喷嘴出口处具有不同的液滴尺寸分布的喷雾。在一个稳定的轴对称喷雾的聚结模拟所需的计算机时间是一个类似的数量级，无论制定，欧拉或拉格朗日，采用。然而，拉格朗日公式在适用范围和易于实施方面更实用。
Lagrangian and Eulerian modelling approaches are compared for simulating turbulent dispersion and coalescence of droplets within a spray. Both models predict similar droplet dispersion rates and shifts in droplet size distribution due to coalescence within the spray, over a wide range of droplet and gas flows, and for sprays with different droplet-size distributions at the nozzle exit. The computer time required for simulating coalescence within a steady axisymmetric spray is of a similar order of magnitude regardless of which formulation, Eulerian or Lagrangian, is adopted. However, the Lagrangian formulation is more practical in terms of the range of applicability and ease of implementation.