Advanced numerical modeling of flow and reactive transport in porous systems

多孔系统中流动和反应输运的高级数值模拟

• 批准号: 34753567
• 负责人: Professor Dr. Sebastian Bauer
• 金额: --
• 依托单位: Department Umweltinformatik (ENVINF)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/34753567?language=en
• 关键词: Advanced; numerical; modeling; flow; reactive

Numerical methods for the coupled simulation of flow, multi-component transport, chemical reactions as well as microbiological degradation and fractionation processes in porous media will be developed, implemented and applied to the high quality experimental data generated within the Research Group. A mixed finite element formulation is to be implemented, using object and process-oriented concepts, which allows the high resolution modeling needed for the heterogeneous and transient flow conditions used in the tank experiments. Additionally, the specific features of the biological reactions as observed in the tank experiments as well as isotope fractionation processes will be implemented. The reactive tank experiments conducted provide excellent application test cases for the verification of the new code. Detailed scenario modeling studies will be used to investigate the effects of spatial structures of hydraulic heterogeneity on transverse dispersion, to test different formulations of the biodegradation reactions, and to identify the limiting processes governing the tank experiments. Coupled to the evaluation of measured and simulated isotopic ratios, this will allow for a high quality evaluation of the biologic kinetic reactions and to quantify the uncertainty related to the kinetic parameters. It is expected that this project will lead to an improved quantitative understanding of mixing controlled degradation processes in natural porous media.

将开发、实施和应用多孔介质中流动、多组分运输、化学反应以及微生物降解和分馏过程的耦合模拟的数值方法，用于研究组内产生的高质量实验数据。一个混合的有限元公式是要实现的，使用对象和面向过程的概念，这使得高分辨率建模所需的非均质和瞬态流条件下使用的坦克实验。此外，将实施在罐实验中观察到的生物反应的具体特征以及同位素分馏过程。反应罐实验为验证新代码提供了很好的应用测试案例。详细的情景模拟研究将被用来调查横向分散的水力异质性的空间结构的影响，测试不同的配方的生物降解反应，并确定限制过程的坦克实验。再加上测量和模拟同位素比值的评价，这将允许生物动力学反应的高质量评价，并量化与动力学参数相关的不确定性。预计该项目将导致在天然多孔介质中混合控制降解过程的定量理解得到改善。