A5076667060- Lattice Boltzmann Simulation Studies
- Air Quality and Health Impacts
- Enhanced Oil Recovery Techniques
- Groundwater flow and contamination studies
- Aerosol Filtration and Electrostatic Precipitation
- Surface Modification and Superhydrophobicity
- Soil and Unsaturated Flow
- Heat and Mass Transfer in Porous Media
- Electrostatics and Colloid Interactions
- Noise Effects and Management
- Fluid Dynamics and Heat Transfer
- Heavy Metal Exposure and Toxicity
- Hydrocarbon exploration and reservoir analysis
- Hydraulic Fracturing and Reservoir Analysis
- Air Quality Monitoring and Forecasting
- Ecology, Conservation, and Geographical Studies
- Vehicle emissions and performance
- Climate Change and Health Impacts
- Wind and Air Flow Studies
- COVID-19 impact on air quality
- Fecal contamination and water quality
- Pickering emulsions and particle stabilization
- Urban Transport and Accessibility
- Spacecraft and Cryogenic Technologies
- Molecular Communication and Nanonetworks
Columbia University
2016-2024
Charles River Laboratories (Netherlands)
2024
University of Augsburg
2002-2023
Lamont-Doherty Earth Observatory
2022
Center for Environmental Health
2021
National Institute of Environmental Health Sciences
2021
John Wiley & Sons (United States)
2016-2020
Johns Hopkins University
2007-2016
University of Baltimore
2005
University of North Carolina at Chapel Hill
1999-2003
We simulate two‐fluid‐phase flow at the pore scale using a lattice Boltzmann (LB) approach. Using parallel processing version of Shan‐Chen model that we developed, set ideal two‐fluid systems and porous medium system comprised synthetic packing with relatively uniform distribution spheres. use two‐phase to validate approach provide parameter information, which then sphere‐pack system. The is designed mimic laboratory experiments conducted evaluate hysteretic capillary pressure saturation...
Background: Electronic cigarettes (e-cigarettes) generate an aerosol by heating a solution (e-liquid) with metallic coil. Whether metals are transferred from the coil to is unknown. Objective: Our goal was investigate transfer of e-liquid in e-cigarette tank and generated aerosol. Methods: We sampled 56 devices daily users obtained samples refilling dispenser, aerosol, remaining tank. Aerosol liquid collected via deposition droplets series conical pipette tips. Metals were reported as mass...
We use two pore-scale approaches, lattice-Boltzmann (LB) and pore-network modeling, to simulate single-phase flow in simulated sphere packings that vary porosity sphere-size distribution. For both modeling we determine the size of representative elementary volume with respect permeability. Permeabilities obtained by LB agree well Rumpf Gupte's experiments for small Reynolds numbers. The simulations empirical Ergun equation intermediate but not suggest a modified form Ergun's describe low...
We herein demonstrate the cause of well-observed variant transport behaviors for apparently identical colloids in porous media under conditions colloid-collector repulsion (unfavorable attachment conditions). that colloid behavior unfavorable can be explained by inherently variable residence times prior to arrest on grains (collectors). time distributions derived from particle trajectory simulations incorporating representative nanoscale heterogeneity provide quantitative prediction...
In this paper, we develop a new correlation for the clean-bed filter coefficient (lambda0) Brownian particles, which diffusion is main deposition mechanism. The based on numerical Lattice-Boltzmann (LB) simulations in random packings of spheres uniform diameter. We use LB methods to solve Navier-Stokes equation flow and then advection-diffusion particle transport. determine an "equivalent" single-collector efficiency, etaD, so that can compare our predictions "true" correlations stemming...
[1] We revisit the classic upscaling approach for predicting Darcy-scale colloid retention based on pore-scale processes, and explore implicit assumption that is a Markov process. Whereas this holds under favorable attachment conditions, it cannot be assumed to hold unfavorable conditions due accumulation of colloids in near-surface fluid domain. develop novel link between two-layer mass transfer parameters topologies pore collector domains, starting with an elegant outcome filtration...
Pulp and paper waste water is one of the major sources industrial pollution. This study tested suitability ceramic tubular membrane technology as an alternative to conventional treatment in pulp industry. In this context, series batch semi-batch processes comprising microfiltration, ultrafiltration nanofiltration, membranes were developed reduce chemical oxygen demand (COD) remove residual lignin from effluent flow during sulfite production. A comparison terms separation efficiency...
We investigate the excitation by sound waves of capillary trapped oil blobs. The three‐phase contact lines either remain pinned to heterogeneities solid surface or slide if are applied. derive approximate, analytical expressions for resonance blobs in tubes both types line behavior. Based upon these simple model systems, we conclude that is significant coarse‐grained but not fine‐grained media.
The connection between farm-generated animal waste and the dissemination of antibiotic resistance in soil microbial communities, via mobile genetic elements, remains obscure. In this study, electromagnetic induction (EMI) surveying a broiler chicken farm assisted sampling from chicken-waste-impacted site marginally affected site. Consistent with EMI survey, disparity existed two sites regard to pH, tetracycline (Tc(r)) levels among culturable bacteria, incidence prevalence several tet erm...
To mitigate the COVID-19 pandemic and prevent overwhelming healthcare system, social-distancing policies such as school closure, stay-at-home orders, indoor dining closure have been utilized worldwide. These function by reducing rate of close contact within populations result in decreased human mobility. Adherence to social distancing can substantially reduce disease spread. Thus, quantifying mobility compliance, especially at high temporal resolution, provide great insight into impact...
Abstract We examined the effects of acoustic excitations on water retention curve, i.e., relationship between capillary pressure and saturation in unsaturated porous media, during drainage. The curves were measured under static dynamic conditions, where was withdrawn from a sandbox with three different pumping rates, 12.6, 19.7, 25.2 mL/s. Excitations frequencies 75, 100, 125, 150 Hz applied. had no effect curve but altered curve. lowered , especially condition rate mL/s when varied 0.6...
We used a recently developed simple mathematical network model to upscale pore-scale colloid transport information determined under unfavorable attachment conditions. Classical log-linear and non-monotonic retention profiles, both well-reported favorable conditions, respectively, emerged from our upscaling. The primary attribute of the is transfer between bulk pore fluid, near surface fluid domain (NSFD), (treated as irreversible). accounts for NSFD down-gradient grains reentrainment via...