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Erschienen in:
2018 | OriginalPaper | Buchkapitel
Three-Dimensional Numerical Analysis of the Air Phase Flow During Air Sparging in Sands
verfasst von : Z. B. Liu, S. Y. Liu, Z. L. Chen, Y. Wang, L. L. Lu, G. Y. Du
Erschienen in: Proceedings of China-Europe Conference on Geotechnical Engineering
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Abstract
The simulator TOUGH2 was adopted to study the air phase flow during in situ air sparging in sands. It was found that the vertical profile of upward air flow is in the shape of water drop before reaching the groundwater table. As the air phase flows upwards, it also moves horizontally, especially when the air reaches the vadose zone. Finally, the zone of influence in air sparging connects the saturated zone with vadose zone and forms a U-shaped area. The air phase saturation degree is symmetrically distributed around sparging well. The air phase saturation degree decreases with the increase of the distance to the sparging well in the horizontal direction. From the sparging point up to the ground, the air phase saturation degree increases first and then decreases.