Multi-scale physical model simulation of particle filtration using computational fluid dynamics
Autor: | Haochen Li, John J. Sansalone |
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Rok vydání: | 2020 |
Předmět: |
Environmental Engineering
Scale (ratio) Computer science 0208 environmental biotechnology Flow (psychology) 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law Computational fluid dynamics 01 natural sciences law.invention Physics::Fluid Dynamics symbols.namesake law Particle Size Waste Management and Disposal Filtration 0105 earth and related environmental sciences business.industry Reynolds number General Medicine Mechanics Models Theoretical Unit operation 020801 environmental engineering Macroscopic scale Hydrodynamics symbols Particle Particulate Matter business |
Zdroj: | Journal of Environmental Management. 271:111021 |
ISSN: | 0301-4797 |
Popis: | Clarifiers integrating radial cartridge filtration (RCF) are a combined unit operation variant of millennia-old sedimentation-filtration systems. Similarly, RCF is a primarily horizontal flow variant with flow orthogonal to gravity and a radial velocity gradient, in contrast to traditional deep-bed vertical filtration. These granular filters function at lower finite granular Reynolds numbers. A proposed computational fluid dynamics framework, implementing the Navier-Stokes equations, couples a pore-scale filter model with a macroscopic scale sedimentation-filtration model to create a tool examining non-Brownian particle separation. Validation is conducted using previous physical testing from a full-scale sedimentation-filtration system under steady flow and particulate loads. Model results illustrate a two-zone filtration structure with respect to particle diameter, similar to vertical filtration. The computational tool predicts particulate matter separation of 86.1% compared to 87.8% for physical testing. The physical-based computational framework does not need high-level calibration as compared to analytical, lumped, or empirical models; conferring direct extensibility to similar unit operation systems. The novel multi-scale tool simulates particulate matter fate in a modern re-incarnation of a sedimentation-filtration unit operation. The tool functions as an adjuvant that complements regulatory or certification testing. The tool can provide guidance for design or maintenance as well as system management with respect to particle fate in, and breakthrough from, granular filters in a combined unit operation. |
Databáze: | OpenAIRE |
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