scholarly journals Comparison of Voxel‐Based and Mesh‐Based CFD Models for Aerosol Deposition on Complex Fibrous Filters

2021 ◽  
Vol 44 (6) ◽  
pp. 1153-1153
Author(s):  
Dennis Hoch ◽  
Mehdi Azimian ◽  
André Baumann ◽  
Jens Behringer ◽  
Jennifer Niessner
Keyword(s):  
Aerosol Deposition ◽  
Cfd Models ◽  
Fibrous Filters

scholarly journals Comparison of Voxel‐Based and Mesh‐Based CFD Models for Aerosol Deposition on Complex Fibrous Filters

2020 ◽  
Vol 43 (12) ◽  
pp. 2538-2547
Author(s):  
Dennis Hoch ◽  
Mehdi Azimian ◽  
André Baumann ◽  
Jens Behringer ◽  
Jennifer Niessner
Keyword(s):  
Aerosol Deposition ◽  
Cfd Models ◽  
Fibrous Filters

Uptake of Soluble Gases in the Entire Respiratory Systems of Rats and Humans Using Transient CFD/PBPK Models

2013 ◽  
Author(s):  
S. Kabilan ◽  
A. Kuprat ◽  
D. Einstein ◽  
J. Carson ◽  
R. Jacob ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Hydrogen Sulfide ◽  
Three Dimensional ◽  
Aerosol Deposition ◽  
Water Soluble ◽  
Computational Techniques ◽  
Nasal Airways ◽  
Cfd Models ◽  
Pbpk Models ◽  
Computational Fluid Dynamics Cfd

With the advancement of experimental and computational techniques, three-dimensional (3D) computational fluid dynamics (CFD) airflow models of the respiratory system have increasingly been used to evaluate aerosol deposition, gas exchange and airflow characteristics under various physiological and/or disease conditions. One specific application that is emerging in the field of toxicology is assessing the risk for exposure to highly reactive, water-soluble gases and vapors including formaldehyde, acetaldehyde, hydrogen sulfide, and acrolein by coupling CFD models of nasal airways of rats and humans to physiological based pharmacokinetic (PBPK) models.

Imaging-Based Multiscale Models of the Respiratory System That Account for Regional Heterogeneity in Health and Disease

2013 ◽  
Author(s):  
S. Kabilan ◽  
D. R. Einstein ◽  
R. E. Jacob ◽  
J. P. Carson ◽  
A. P. Kuprat ◽  
...  
Keyword(s):  
Differential Equations ◽  
Fluid Dynamic ◽  
Three Dimensional ◽  
Aerosol Deposition ◽  
Computational Techniques ◽  
Multiscale Models ◽  
Regional Heterogeneity ◽  
Disease States ◽  
Cfd Models ◽  
Health And Disease

Multiscale computational fluid dynamic (CFD) models are fast gaining importance in the field of respiratory systems modeling due to recent advancements in experimental and computational techniques. These models couple imaging-based, physiologically realistic, three-dimensional (3D) geometries to lower-dimensional ordinary differential equations (ODE) or partial differential equations (PDE) that represent the unseen lung. Local deviations from nominal heterogeneity and compliance in disease states such as emphysema and fibrosis have both important clinical and pathological implications. Hence, it is important to incorporate regional heterogeneity in the CFD models while modeling airflow characteristics, aerosol deposition, drug delivery, and risk assessment.

Film Condensation and Aerosol Deposition in Turbulent Flows with Noncondensable Gases

1997 ◽  
Vol 28 (4-6) ◽  
pp. 277-288
Author(s):  
Leonid I. Zaichik ◽  
Bulat I. Nigmatulin ◽  
Vladimir M. Alipchenkov ◽  
V. A. Belov
Keyword(s):  
Turbulent Flows ◽  
Aerosol Deposition ◽  
Film Condensation ◽  
Noncondensable Gases

Integrating High Purity Oxygen, Process Modeling, and CFD Models for Doubling Treatment Capacity in a Full Scale Leachate Wastewater Treatment

2015 ◽  
Vol 2015 (6) ◽  
pp. 1647-1657
Author(s):  
Malcolm Fabiyi ◽  
Asun Larrea ◽  
Wladimir Sarmiento-Darkin ◽  
Tony Wang ◽  
Simon Ho ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Process Modeling ◽  
High Purity ◽  
Full Scale ◽  
Cfd Models ◽  
Oxygen Process

Hybrid Aerosol Deposition Process for Ceramic Coatings

2018 ◽  
Vol 87 (2) ◽  
pp. 136-143 ◽  
Author(s):  
Kentaro SHINODA ◽  
Takanori SAEKI ◽  
Jun AKEDO
Keyword(s):  
Aerosol Deposition ◽  
Deposition Process ◽  
Ceramic Coatings

scholarly journals Uncertainties Analysis on the Prediction of Flow and Heat Transfer of Liquid Sodium with CFD Technology

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Zhanwei Liu ◽  
Xinyu Li ◽  
Tenglong Cong ◽  
Rui Zhang ◽  
Lingyun Zheng ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Nusselt Number ◽  
Friction Coefficient ◽  
Liquid Sodium ◽  
Heat Transfer Characteristics ◽  
Backward Facing Step ◽  
Heating Wall ◽  
Transfer Characteristics ◽  
Cfd Models ◽  
Flow And Heat Transfer

The prediction of flow and heat transfer characteristics of liquid sodium with CFD technology is of significant importance for the design and safety analysis of sodium-cooled fast reactor. The accuracies and uncertainties of the CFD models should be evaluated to improve the confidence of the numerical results. In this work, the uncertainties from the turbulent model, boundary conditions, and physical properties for the flow and heat transfer of liquid sodium were evaluated against the experimental data. The results of uncertainty quantization show that the maximum uncertainties of the Nusselt number and friction coefficient occurred in the transition zone from the inlet to the fully developed region in the circular tube, while they occurred near the reattachment point in the backward-facing step. Furthermore, in backward-facing step flow, the maximum uncertainty of temperature migrated from the heating wall to the geometric center of the channel, while the maximum uncertainty of velocity occurred near the vortex zone. The results of sensitivity analysis illustrate that the Nusselt number was negatively correlated with the thermal conductivity and turbulent Prandtl number, while the friction coefficient was positively correlated with the density and Von Karman constant. This work can be a reference to evaluate the accuracy of the standard k-ε model in predicting the flow and heat transfer characteristics of liquid sodium.

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