Fig. 7From: Effect of groundwater forced seepage on heat transfer characteristics of borehole heat exchangersComparison of multi-tube (four tubes) numerical solution with Hecht-Méndez’s solution (Hecht-Méndez 2013): dimensionless mean temperature (\(\bar\theta\) = 4πλeΔ\(\bar{T}\)/q) change over FoBack to article page