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DOI10.1016/j.jhazmat.2012.11.021
Computational fluid dynamics simulation of transport and retention of nanoparticle in saturated sand filters
Hassan, Ashraf Aly1; Li, Zhen2; Sahle-Demessie, Endalkachew1; Sorial, George A.2
发表日期2013-01-15
ISSN0304-3894
卷号244页码:251-258
英文摘要

Experimental and computational investigation of the transport parameters of nanoparticles (NPs) flowing through porous media has been made. This work intends to develop a simulation applicable to the transport and retention of NPs in saturated porous media for investigating the effect of process conditions and operating parameters such, as ion strength, and filtration efficiency. Experimental data obtained from tracer and nano-ceria, CeO2, breakthrough studies were used to characterize dispersion of nanoparticle with the flow and their interaction with sand packed columns with different heights. Nanoparticle transport and concentration dynamics were solved using the Eulerian computational fluid dynamics (CFD) solver ANSYS/FLUENT (R) based on a scaled down flow model. A numerical study using the Navier-Stokes equation with second order interaction terms was used to simulate the process. Parameters were estimated by fitting tracer, experimental NP transport data, and interaction of NP with the sand media. The model considers different concentrations of steady state inflow of NPs and different amounts of spike concentrations. Results suggest that steady state flow of dispersant-coated NPs would not be retained by a sand filter, while spike concentrations could be dampened effectively. Unlike analytical solutions, the CFD allows estimating flow profiles for structures with complex irregular geometry and uneven packing. Published by Elsevier B.V.


英文关键词Computational fluid dynamics (CFD);Nanoparticles;Flow through porous media;Modeling transport and deposition
语种英语
WOS记录号WOS:000315001000029
来源期刊JOURNAL OF HAZARDOUS MATERIALS
来源机构美国环保署
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/57249
作者单位1.US EPA, Off Res & Dev, Natl Risk Management Res Lab, Cincinnati, OH 45268 USA;
2.Univ Cincinnati, Environm Engn Program, Sch Energy Environm Biol & Med Engn, Cincinnati, OH USA
推荐引用方式
GB/T 7714
Hassan, Ashraf Aly,Li, Zhen,Sahle-Demessie, Endalkachew,et al. Computational fluid dynamics simulation of transport and retention of nanoparticle in saturated sand filters[J]. 美国环保署,2013,244:251-258.
APA Hassan, Ashraf Aly,Li, Zhen,Sahle-Demessie, Endalkachew,&Sorial, George A..(2013).Computational fluid dynamics simulation of transport and retention of nanoparticle in saturated sand filters.JOURNAL OF HAZARDOUS MATERIALS,244,251-258.
MLA Hassan, Ashraf Aly,et al."Computational fluid dynamics simulation of transport and retention of nanoparticle in saturated sand filters".JOURNAL OF HAZARDOUS MATERIALS 244(2013):251-258.
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