INVESTIGATION FOR NECESSITY OF DISPERSIVITY AND TORTUOSITY IN THE DUSTY GAS MODEL FOR A BINARY GAS SYSTEM IN SOIL
作者： Yoshihiko Hibi , Katsuyuki Fujinawa , Seiji Nishizaki , Kazuo Okamura , Masaharu Tasaki
DOI: 10.3208/SANDF.50.143
关键词:
摘要: Diffusion, dispersion, and advection are important processes in multi-gas systems soils. To date, both Fick's model the Dusty Gas (DG) have been used to movement of gases these systems. Dispersion is included dispersion-advection equation with Model for gas-phase soil, yet multi-component gas-soil considered be expressed more accurately by DG than model. However no study has investigated necessity considering dispersion We carried out column experiments nitrogen-methane, nitrogen-carbon dioxide, carbon dioxide-methane binary gas sandy also did simulations on same using A comparison results our confirmed that there was need consider advection-diffusion equations when velocity 0.05-0.4 cm/s Toyoura sand. Furthermore, showed that, rather tortuosity should taken into account application above condition.
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