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首页> 外文会议>International Conference on Remediation of Chlorinated and Recalcitrant Compounds >Estimation of Mass Discharge Emanating from DNAPL Source-Zones Using Upscaled Mass Transfer Coefficients
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Estimation of Mass Discharge Emanating from DNAPL Source-Zones Using Upscaled Mass Transfer Coefficients

机译：使用升高传质系数从DNAPL源区发出的质量排出的估计

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Recent studies have suggested that downgradient mass fluxes from dense non-aqueous phase liquid (DNAPL) source-zones are controlled to a large extent by the 'architecture' of the entrapped DNAPL. Detailed field-scale characterization of DNAPL architecture, however, is typically infeasible due to the heterogeneity of source zones. This fact, coupled with the large computational cost associated with numerical field-scale dissolution simulations for heterogeneous domains, has motivated research to develop simplified modeling approaches. Such models account for the effect of spatial variations in DNAPL saturations through the use of "upscaled" parameters. Upscaled modeling methods typically incorporate dilution effects, resulting from flow by-passing and irregu^ lar saturation distributions, into a single, lumped, upscaled mass transfer coefficient. Employment of an upscaled mass transfer coefficient enables prediction of source-zone mass discharge and source longevity using analytic solutions to the one-dimensional contaminant transport equation. Although conceptually attractive, the utility of these upscaled models for prediction of mass discharge from nonuniform, three-dimensional DNAPL source-zones has yet to be fully evaluated.
机译：最近的研究表明，来自浓度的非水相液（DNAPL）源区的降级质量通量在很大程度上被捕获的DNAPL的“架构”控制。然而，由于源区的异质性，DNAPL架构的详细场尺度表征通常是不可行的。这一事实，加上了与异构域的数值场稳定溶解模拟相关的大型计算成本，具有开发简化的建模方法的动力研究。这些模型通过使用“升高”参数来占地空间变化的影响。上部建模方法通常包含稀释效应，由流量旁通和urdu ^ Lar饱和分布产生，成单个，集成，升高的质量传递系数。使用升高的传质系数的就业使得利用分析解决方案对一维污染物传输方程的分析解来预测源区质量放电和源极限。虽然概念上具有吸引力，但是这些upscoded模型的效用用于预测来自非均匀，三维DNAPL源区的质量排放的预测尚未得到完全评估。

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