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来自球体点源注射的反应混合前线的增长和停止
Luka Negrojević1, Pratyaksh Karan2, Joris Heyman2
1Nonlinear Physical Chemistry Unit, Université Libre de Bruxelles (ULB), CP231, 1050 Brussels, Belgium.
Environmental science & technology
|October 24, 2025
概括
研究人员在点源注射期间在3D多孔介质中发现了自我组织的静止球体,揭示了新的反应性运输动力学. 这一发现对于理解涉及化学前线的环境过程至关重要.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 流体动力学 流体动力学
背景情况:
- 环境中的反应过程通常涉及从点源注入到介质中的化学前线形成与另一个反应物.
- 在平面和圆柱体系统中,双分子反应前线得到了很好的研究,但在3D多孔介质中,球形配置尚未得到充分的探索.
- 了解这些动态对于环境应用来说至关重要,特别是地下溶液运输.
研究的目的:
- 实验性地研究二分子反应前线的动力学,其球形配置是通过点状注入3D多孔介质而产生的.
- 分析自我组织的静止反应区的形成.
- 为了验证对3D领域的反应性前线增长和停止的理论预测.
主要方法:
- 在基于水凝的介质中利用双分子氧化还原反应来模拟环境反应运输.
- 通过实验测量了产品分布,前部位置和产品随时间的形成.
- 进行了数值模拟,以分析反应剂扩散率差异对前端特征的影响.
主要成果:
- 证明了自我组织的静止球体的形成,其中反应区保持固定半径.
- 确定静止前半径与流量线性缩放,与扩散系数和度比率相反.
- 在受反应剂扩散性影响的反应运输中确定了新的动态模式.
结论:
- 在3D多孔介质中点状注入可以导致自组织的静止球形反应前线.
- 实验数据支持对3D中反应性前部停止的理论预测.
- 强调需要全面的3D建模,以便在涉及点注射的环境应用中准确模拟反应式运输.
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