COMPARISON OF INTERFACIAL PARTITIONING TRACER TEST AND HIGH-RESOLUTION MICROTOMOGRAPHY MEASUREMENTS OF FLUID-FLUID INTERFACIAL AREAS FOR AN IDEAL POROUS MEDIUM.
COMPARISON OF INTERFACIAL PARTITIONING TRACER TEST AND HIGH-RESOLUTION MICROTOMOGRAPHY MEASUREMENTS OF FLUID-FLUID INTERFACIAL AREAS FOR AN IDEAL POROUS MEDIUM.
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DOI：
10.1029/2009wr008375
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发表时间：
2010-08
影响因子：
5.4
通讯作者：
Brusseau ML
中科院分区：
文献类型：
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作者：
Narter M;Brusseau ML
多孔介质体系的流体-流体界面面积可以用水相界面分配示踪法(IPTT)或高分辨率显微层析成像来测量。以前的研究结果表明，用IPTT方法测得的界面面积比用显微断层扫描法测得的值大。观测到的视差被假设为多孔介质表面粗糙度对薄膜结合界面面积的影响，其中由于分辨率的限制，表面粗糙度的影响在一定程度上是通过IPTT方法来表征的，而不是通过显微层析成像来表征。用这两种方法测量了不具有可测量表面粗糙度的理想玻璃微珠介质的有机不混溶液体与水之间的界面面积，从而验证了这一假设。示踪剂试验得到的平均界面面积为2.8(±5 cm−1)，而显微断层扫描得到的界面面积为2.7(±2 cm−1)。计算了最大比界面面积，相当于由非润湿流体体积归一化的面积，并与比固体表面积的测量结果进行了比较。归一化界面面积与用光滑球假设计算的比固体表面积和用N_2/BET法测得的比固体表面积相似。结果表明，IPTT和显微层析成像方法都能很好地刻画流体-流体界面区域，而且在不受表面粗糙度影响的情况下，两者具有可比性。
Fluid-fluid interfacial area for porous-media systems can be measured with the aqueous-phase interfacial partitioning tracer test (IPTT) method or with high-resolution microtomography. The results of prior studies have shown that interfacial areas measured with the IPTT method are larger than values measured with microtomography. The observed disparity has been hypothesized to result from the impact of porous-medium surface roughness on film-associated interfacial area, wherein the influence of surface roughness is characterized to some extent by the IPTT method but not by microtomography due to resolution constraints. This hypothesis was tested by using the two methods to measure interfacial area between an organic immiscible liquid and water for an ideal glass-beads medium that has no measurable surface roughness. The tracer tests yielded a mean interfacial area of 2.8 (± 5 cm−1), while microtomography produced an interfacial area of 2.7 (± 2 cm−1). Maximum specific interfacial areas, equivalent to areas normalized by non-wetting fluid volume, were calculated and compared to measures of the specific solid surface area. The normalized interfacial areas were similar to the specific solid surface area calculated using the smooth-sphere assumption, and to the specific solid surface area measured using the N2/BET method. The results presented herein indicate that both the IPTT and microtomography methods provide robust characterization of fluid-fluid interfacial area, and that they are comparable absent the impact of surface roughness.