Fluorescence imaging techniques: Application to measuring flow and transport in refractive index-matched porous media

摘要: Publisher Summary This chapter is part of an extensive research in laboratories to understand the nature microscopic flow and transport processes within porous media. A novel non-intrusive imaging approach has been used observe pore-scale behavior at high resolution accuracy. reports on: fluorescent particle tracking velocimetry concentration techniques, direct experimental evaluation dispersive fluxes dispersion coefficients, estimates representative elementary volume (REV), correlations velocity results medium, 3-D plots gain insights processes. The overall objective use these findings toward gaining understanding chemical a medium and, as result, provide basis for improved modeling Traditionally, there have three different approaches modelling first statistical method treating media random structure. second geometrical assuming similar geometry under study solve conservation equations. third (continuum) averaging procedure that helps describe terms macroscopic rather than scale variables. All result undetermined parameters must be evaluated from experiments.