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Modelling the dissolution of non-aqueous phase liquid blobs in sphere packings
Elisa Dalla1, Markus Hilpert, Casey Miller
1Dip. Scienze dell'Ambiente e del Territorio-Università degli Studi di Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, Italy. elisa.dalla@unimib.it
Annali Di Chimica
|August 28, 2003
Summary
This study models non-aqueous phase liquid (NAPL) dissolution in porous media using pore-scale simulations. Results offer insights into mass transfer coefficients for improved environmental remediation strategies.
Area of Science:
- Environmental science
- Geophysics
- Chemical engineering
Background:
- Pore-scale modeling bridges macroscopic and microscopic scales for multiphase porous media systems.
- Accurate quantification of non-aqueous phase liquid (NAPL) mass transfer is vital for effective decontamination studies.
Purpose of the Study:
- To develop a pore-scale simulation method for studying NAPL blob dissolution.
- To quantify NAPL mass transfer and its sensitivity to key parameters.
Main Methods:
- Simulated random sphere packing and residual NAPL distribution matching experimental descriptors.
- Employed lattice-Boltzmann for single-phase flow simulation.
- Solved advection-diffusion equation in pore space for mass transfer and transport.
Main Results:
- Evaluated mass transfer coefficient sensitivity to two non-dimensional parameters.
- Compared simulation outcomes with existing empirical relationships for NAPL dissolution.
Conclusions:
- The developed pore-scale simulation method accurately captures NAPL dissolution processes.
- Findings contribute to refining constitutive equations for multiphase porous media flow and transport.
- Provides a basis for improved environmental remediation strategies.