考虑尺寸排除效应颗粒迁移模型的建立

Establishment of particulate transport:size exclusion effect

以地下水源热泵回灌中的物理堵塞问题作为研究背景,建立一种基于质量平衡方程来模拟多孔介质中颗粒迁移和沉积造成孔隙损伤的数学模型,同时考虑了多孔介质孔隙中悬浮颗粒浓度随时间的动态变化,引入了流量折减系数(rs,x,t)和进入系数(rs,x,t)这两个变量,充分考虑了尺寸排除效应的影响。堵塞的发生往往是由一个颗粒所引起的,即一个颗粒堵塞一个孔隙,反之亦然。研究结果为解决回灌井物理堵塞的室内外试验研究提供理论依据。

Study on the physical clogging of water source heat pump （WSHP） in recharge, and based on the mass balance equation to establish the mathematical model of transport and deposition of particulates. The suspended particle＇s concentration dynamic changes with time and bring into the two variable quantity of α（rs, x, t） and γ（rs, x, t） are introduced, and the size exclusion effect in model is considered fully. The occurrence of clogging is often caused by a particle that one particle plug a pore, and vice versa. The results of theoretical of the physical clogging of WSHP in recharge would directly bring into experiment research.