Simulation of aerosol dynamics and transport in chemically reacting particulate matter laden flows. Part II: Application to CVD reactors

Kommu, Srikanth; Khomami, Bamin; Biswas, Pratim

doi:10.1016/j.ces.2003.05.010

Cited by 21 publications

(9 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the distance particles with diameters of 3-50 nm travel in 1 s by diffusion is in range of 1.2 mm (3 nm particles) to 0.07 mm (50 nm particles) and by thermophoresis with a temperature gradient of 247 K/0.01 m the distance is »1 mm for particle less than about 50 nm (temperature gradient due to difference in nozzle and ambient air temperature, see SI section S5 for details). Thermophoretic force might affect the particle tracks (Kommu et al 2004) and previous model results showed »40% increase in aerosol diffusional deposition rates onto surfaces when considering thermophoresis at high temperature (Bai and Biswas 1990). This indicates the small aerosols (e.g., <50 nm) might be collected by a combination of diffusion and thermophoresis before they grow and are advected out of the control volume.…”

Section: Discussionmentioning

confidence: 91%

Investigating particle emissions and aerosol dynamics from a consumer fused deposition modeling 3D printer with a lognormal moment aerosol model

Zhang

Sharma

Wong

et al. 2018

Aerosol Science and Technology

Self Cite

View full text Add to dashboard Cite

Particle emissions from consumer-fused deposition modeling 3D printers have been reported previously; however, the complex processes leading to observed aerosols have not been investigated. We measured particle concentrations and size distributions between 7 nm and 25 mm emitted from a 3D printer under different conditions in an emission test chamber. The experimental data was combined with a moment lognormal aerosol dynamic model to better understand particle formation and subsequent evolution mechanisms. The model was based on particles being formed from nucleation of unknown semivolatile compounds emitted from the heated filament during printing, which evolve due to condensation of emitted vapors and coagulation, all within a small volume near the printer extruder nozzle. The model captured observed steady state particle number size distribution parameters (total number, geometric mean diameter and geometric standard deviation) with errors nominally within 20%. Model solutions provided a range of vapor generation rates, saturation vapor pressures and vapor condensation factors consistent with measured steady state particle concentrations and size distributions. Vapor generation rate was a crucial factor that was linked to printer extruder temperature and largely accounted for differences between filament material and brands. For the unknown condensing vapor species, saturation vapor pressures were in the range of 10 ¡3 to 10 ¡1 Pa. The model suggests particles could be removed by design of collection surfaces near the extruder tip.

show abstract

Section: Discussionmentioning

confidence: 91%

Investigating particle emissions and aerosol dynamics from a consumer fused deposition modeling 3D printer with a lognormal moment aerosol model

Zhang

Sharma

Wong

et al. 2018

Aerosol Science and Technology

Self Cite

View full text Add to dashboard Cite

show abstract

“…In recent years, based on the developments along different lines described above, successful attempts have been made in using simulation not only to optimize hydrodynamic reactor design and eliminate flow recirculations [77,85] and to predict and optimize deposition rate and uniformity [74,78,131,132], but also to optimize temperature uniformity [47,133], to predict and control formation and transport of particles [134,135], to scale-up existing reactors to larger wafer diameters [136,137], to optimize processing conditions with respect to deposition conformality [52], to predict the influence of process conditions on doping rates [138], to evaluate loading effects on selective deposition rates [15], to study the influence of operating conditions on selectivity loss [123], etc. Also, some studies have been performed that apply transport phenomena modeling to study and optimize the use of CVD in the manufacture of coated powder particles [139,140].…”

Section: Cvd Simulation Models: a Literature Reviewmentioning

confidence: 99%

Multi-scale modeling of chemical vapor deposition processes for thin film technology

Kleijn

Dorsman

Kuijlaars

et al. 2007

Journal of Crystal Growth

View full text Add to dashboard Cite

“…The route of particle formation for the different precursor feed conditions was simulated. Later, the discrete-model was successfully applied in modeling an ACVD reactor to simulate the particle formation and deposition. , In addition, Gao et al (2017) used this model to simulate the ultrafine particle formation in a high sodium lignite combustion reactor. Further, Dhamale et al (2018) coupled the discrete-section model with CFD to study the nucleation and growth of Y 2 O 3 nanoparticles in a thermal plasma reactor.…”

Section: Multiscale Simulations For Aerosol Reactor Systemmentioning

confidence: 99%

Mini Review on Gas-Phase Synthesis for Energy Nanomaterials

Zhang

Zhou

et al. 2020

Energy Fuels

Self Cite

View full text Add to dashboard Cite

Gas-phase routes have emerged as a promising method for synthesizing functional nanomaterials. A review of the state-of-the-art on aerosol reactors, such as flame aerosol reactors, plasma aerosol reactors, furnace aerosol reactors, and chemical vapor deposition used for gas-phase synthesis is discussed. This is followed by a discussion of applications of gas-phase synthesized nanomaterials in photocatalysis, photovoltaics, and energy storage. A description of modeling approaches to predict and elucidate the physical and chemical processes in aerosol reactors is discussed. Multiscale modeling methods from the atomic to molecular scale, to primary particles and clusters, to larger aggregates are elucidated. Aerosol dynamics simulation for predicting the size distribution of both single- and multicomponent particles is systematically examined. Further, high-flow differential mobility analyzers used for characterizing sub 2 nm particles are discussed, along with an in situ laser diagnostic approach for measuring physical and chemical properties of as-formed particles. Finally, remarks of future trends are directed for gas-phase synthesis routines in producing energy nanomaterials.

show abstract

Simulation of aerosol dynamics and transport in chemically reacting particulate matter laden flows. Part II: Application to CVD reactors

Cited by 21 publications

References 30 publications

Investigating particle emissions and aerosol dynamics from a consumer fused deposition modeling 3D printer with a lognormal moment aerosol model

Investigating particle emissions and aerosol dynamics from a consumer fused deposition modeling 3D printer with a lognormal moment aerosol model

Multi-scale modeling of chemical vapor deposition processes for thin film technology

Mini Review on Gas-Phase Synthesis for Energy Nanomaterials

Contact Info

Product

Resources

About