Dispersion of imbibition fronts

被引：3
|
作者：
Mélean, Y [1 ]
Broseta, D
Hasmy, A
Blossey, R
机构：
[1] Inst Francais Petr, F-92852 Rueil Malmaison, France
[2] Inst Venezolano Invest Cient, Ctr Fis, Lab Fis Estadist Sistemas Desordenados, Caracas 1020A, Venezuela
[3] Univ Saarland, Ctr Bioinformat, D-66041 Saarbrucken, Germany
来源：
EUROPHYSICS LETTERS | 2003年 / 62卷 / 04期
关键词：
D O I：
10.1209/epl/i2003-00380-5
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have studied the dispersive behaviour of imbibition fronts in a porous medium by X-ray tomography. Injection velocities were varied and the porous medium was initially prewetted or not. At low velocity in the prewetted medium, the imbibition profiles are found to be distinctly hyperdispersive. The profiles are anomalously extended when compared to tracer fronts exhibiting conventional (Gaussian) dispersion. We observe a strong velocity dependence of the exponent characterizing the divergence of the dispersion coefficient for low wetting-fluid saturation. Hyperdispersion is absent at high imbibition velocities or when the medium is not prewetted.
引用
收藏
页码：505 / 511
页数：7
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