Small scale flow processes in aqueous heterogeneous porous media
- Lawrence Livermore National Lab., CA (United States). Environmental Programs Directorate
Small scale flow processes in aqueous heterogeneous porous systems have been studied experimentally via novel nonintrusive fluorescence imaging techniques. The techniques involve 3D visualization and quantification of flow fields within a refractive index-matched transparent porous column. The refractive index-matching yields a transparent porous medium, free from any scattering and refraction at the solid-liquid interfaces, as a result allowing direct optical probing at any point within the porous system. By illuminating the porous regions within the column with a planar sheet of laser beam, flow processes through the porous medium can be observed microscopically, and qualitative and quantitative in-pore transport information can be obtained at a good resolution and a good accuracy. A CCD camera is used to record the fluorescent images at every vertical plane location while sweeping back and forth across the column. These digitized flow images are then analyzed and accumulated over a 3D volume within the column. Series of flow experiments in aqueous, refractive index-matched, porous systems packed with natural mineral particles have been performed successfully in these laboratories.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 244573
- Report Number(s):
- UCRL-JC-124068; CONF-960738-5; ON: DE96011415; TRN: AHC29613%%48
- Resource Relation:
- Conference: 1996 American Society of Mechanical Engineers (ASME) Fluid Engineering Division summer meeting, San Diego, CA (United States), 7-11 Jul 1996; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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