Visualization and simulation of bubble growth in pore networks
Visualization and simulation of bubble growth in pore networks
复制标题
孔隙网络中气泡生长的可视化和模拟
DOI：
10.1002/aic.690410203
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发表时间：
1995
期刊：
影响因子：
3.7
通讯作者：
Y. Yortsos
中科院分区：
文献类型：
--
作者：
Xuehai Li;Y. Yortsos
多孔介质中气泡的成核与生长是压力衰竭、沸腾等过程中遇到的重要问题。为了了解它的基本方面，实验和数值模拟在微观模型的几何形状进行。在二维蚀刻玻璃微模型和Hele-Shaw池中进行了压力耗尽气泡生长实验。气泡的成核和随后的气体团簇的生长被可视化。相反的散装或Hele-Shaw细胞，气体簇的微观模型中有不规则和分歧的形状和共享的许多功能的外部入侵过程（例如，在排水过程中的渗流）。建立了多孔网络数值模型，模拟了不同条件下多气体团簇的生长过程。该模型是基于对流扩散方程的解决方案，也占毛细和粘性力，这在确定的增长模式中发挥了重要作用。数值模拟结果与实验结果吻合较好。
Bubble nucleation and bubble growth in porous media is an important problem encountered in processes, such as pressure depletion and boiling. To understand its basic aspects, experiments and numerical simulations in micromodel geometries were undertaken. Experiments of bubble growth by pressure depletion were carried out in 2-D etched-glass micromodels and in Hele-Shaw cells. Nucleation of bubbles and the subsequent growth of gas clusters were visualized. Contrary to the bulk or to Hele-Shaw cells, gas clusters in the micromodel have irregular and ramified shapes and share many of the features of an external invasion process (e.g. of percolation during drainage). A pore network numerical model was developed to simulate the growth of multiple gas clusters under various conditions. The model is based on the solution of the convection-diffusions equation and also accounts for capillary and viscous forces, which play an important role in determining the growth patterns. Numerical simulation resulted in good agreement with the experimental results.