A numerical investigation to determine longitudinal dispersion coefficient in ideal and randomized reticulated porous structures using transient direct pore level simulation
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Date
2023
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Publisher
Elsevier Ltd
Abstract
The purpose of this numerical investigation is to characterize the longitudinal dispersion coefficients in open-cell reticulated porous structures. Open-cell foams are modelled using idealized Kelvin cell structures. Using the conventional Navier–Stokes equation, airflow has been calculated through various porous structures. Along with the flow, the dispersion of a tracer fluid is traced across the structures and analyzed in terms of the effective dispersion coefficient. Using direct pore level simulations (DPLS), a parametric study is performed to understand the influence of geometrical parameters on the dispersion in porous media. To evaluate the longitudinal dispersion coefficient (LDC), the analytic solution gradients were fitted into the simulated gradients. From the results, a new characteristic length correlation is proposed to calculate the Peclet number, and it is compared with experimental and numerical data that are available in the literature. © 2023 Elsevier Ltd
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Keywords
Cells, Cytology, Dispersions, Geometry, Navier Stokes equations, Porosity, Characterization, Direct pore level simulation, Kelvin cells, Longitudinal dispersion coefficient, Longitudinal dispersions, Numerical investigations, Open-cell, Open-cell foams, Porous medium, Porous structures, Porous materials
Citation
Chemical Engineering Science, 2023, 274, , pp. -