Simulation of colloidal fouling by coupling a dynamically updating velocity profile and electric field interactions with Force Bias Monte Carlo methods for membrane filtration.
← Research streamForce Bias Monte Carlo simulations of pressure-driven crossflow membrane filtration predicted particle deposition influenced by Brownian diffusion, shear-induced diffusion, convection, and particle-particle/particle-membrane interactions (electrostatic double…
Study snapshot
Abstract
Pressure-driven flow through a channel with membrane walls is modeled for high particulate volume fractions of 10%. Particle transport is influenced by Brownian diffusion, shear-induced diffusion, and convection due to the axial crossflow. The particles are also subject to electrostatic double layer repulsion and van der Waals attraction, from both particle-particle and particle-membrane interactions. Force Bias Monte Carlo (FBMC) simulations predict the deposition of the particles onto the membranes, where both hydrodynamics and the change in particle potentials determine the probability that a proposed move is accepted. The particle volume fraction is used to determine an apparent local viscosity observed by the continuum flow. As particles migrate, the crossflow velocity field evolves in quasi-steady fashion with each time instance appearing fully developed in the downstream direction. Particles subject to combined hydrodynamic and electric effects (electrostatic double layer repulsion and van der Waals attraction) reach a more stable steady-state as compared to systems with only hydrodynamic effects considered. As expected, at higher crossflow Reynolds numbers more particles remain in the crossflow free stream.
AI evidence extraction
Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.
Main findings
Force Bias Monte Carlo simulations of pressure-driven crossflow membrane filtration predicted particle deposition influenced by Brownian diffusion, shear-induced diffusion, convection, and particle-particle/particle-membrane interactions (electrostatic double layer repulsion and van der Waals attraction). Including combined hydrodynamic and electric interaction effects led to a more stable steady-state than hydrodynamics-only simulations, and higher crossflow Reynolds numbers resulted in more particles remaining in the free stream.
Outcomes measured
- Particle deposition onto membranes (colloidal fouling)
- Steady-state particle distribution under crossflow
- Effect of electrostatic double layer repulsion and van der Waals attraction on transport/deposition
Limitations
- Simulation/modeling study rather than empirical measurements
- No EMF exposure parameters (frequency, field strength, SAR) reported; electric effects described as electrostatic double layer interactions in colloidal systems
View raw extracted JSON
{
"study_type": "engineering",
"exposure": {
"band": null,
"source": null,
"frequency_mhz": null,
"sar_wkg": null,
"duration": null
},
"population": null,
"sample_size": null,
"outcomes": [
"Particle deposition onto membranes (colloidal fouling)",
"Steady-state particle distribution under crossflow",
"Effect of electrostatic double layer repulsion and van der Waals attraction on transport/deposition"
],
"main_findings": "Force Bias Monte Carlo simulations of pressure-driven crossflow membrane filtration predicted particle deposition influenced by Brownian diffusion, shear-induced diffusion, convection, and particle-particle/particle-membrane interactions (electrostatic double layer repulsion and van der Waals attraction). Including combined hydrodynamic and electric interaction effects led to a more stable steady-state than hydrodynamics-only simulations, and higher crossflow Reynolds numbers resulted in more particles remaining in the free stream.",
"effect_direction": "unclear",
"limitations": [
"Simulation/modeling study rather than empirical measurements",
"No EMF exposure parameters (frequency, field strength, SAR) reported; electric effects described as electrostatic double layer interactions in colloidal systems"
],
"evidence_strength": "insufficient",
"confidence": 0.74,
"peer_reviewed_likely": "yes",
"keywords": [
"membrane filtration",
"colloidal fouling",
"Force Bias Monte Carlo",
"crossflow",
"Brownian diffusion",
"shear-induced diffusion",
"electrostatic double layer",
"van der Waals",
"particle deposition",
"hydrodynamics"
],
"suggested_hubs": []
}AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.
Identifiers and source
DOI: 10.1016/j.jcis.2012.10.074
PubMed: 23540433