成層土壌中熱・水分同時移動の数値解析

DOI Web Site 参考文献24件

書誌事項

タイトル別名
  • Numerical Simulation of Simultaneous Heat and Water Flow in Layered Soil Column
  • セイソウ ドジョウ チュウ ネツ スイブン ドウジ イドウ ノ スウチ カイセキ

この論文をさがす

抄録

For improving Aquifer Thermal Energy Storage (ATES) technique, precise analysis of coupled heat and water flow in saturated-unsaturated soils under thermal gradients is important. In this study, numerical simulations based on coupled equations were conducted and compared with measured data obtained from the heat and water flow experiments. Liquid and vapor flow, heat transfer with water flow, and an effect of lateral heat flow into and out of a soil column were all considered. The used soil column consists of two layers that are fine and coarse sands, both having relatively large pores, as often found in ATES.<BR>The code was found to be effective if various soil parameters were quantified adequately. Especially in the case temperature at the upper boundary of a soil column was higher than at the lower boundary, soil hydraulic conductivity function required careful determination. And vapor flow induced by pressure head gradient, temperature dependence of pressure head, and sensible heat fluxes were not negligible and correction factor for thermal vapor flow could not be considered constant. For the opposite thermal gradient, neglect or simplification of these factors was possible. Furthermore, effects of air movement, containing water vapor, could be included in thermal vapor diffusivity, however its degree had to be changed in response to the direction of thermal gradient against that of gravitational gradient.

収録刊行物

参考文献 (24)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ