The flow resistance of CDG in the fine and coarse sandpacks increased rapidly, after the solutions corresponding 21 and 65 times of porous volume were injected respectively.
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- CDG体系在粗砂中流动时,需流过65Vp(孔隙体积)的溶液,才能使填充砂管的阻力系数大大增加; 而要增加同样的阻力系数,细砂管只需流过21Vp的溶液。