3D Numerical Simulation of Aerodynamic Characteristics of a Gas Filter

Si, Fangfang; Lian, Pengfei; Yang, Derui; Han, Guolin; Hao, Shaoyue; Ye, Pingwei

doi:10.4236/jamp.2019.78132

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…The simulation has presented the flow behavior of the preferential flow in the porous media filter as well as predicted the area of the dead zone. The dead zone normally occurred in the region of high-pressure drop as well as insufficient adsorption rate [12,19]. However, several researchers had done the simulation on the gas mask canister [7,10,20,24].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Preferential Flow at the Front Mesh Cartridge of the Gas Mask Filter: Cases in Malaysia Climate Environment

Noraini¹,

Azmir

Taib

et al. 2022

ARASET

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A gas mask respirator is essential for human protection from the hazardous and toxic chemical environment. The gas mask filter should be regularly checked, and the filter must be changed abruptly based on the temporal exposure to the toxic environment. Furthermore, the filter is exposed to a highly humid climate, and the high gas concentration speeds up the expiry cycle of the gas mask filter. Thus, this study aims to investigate the preferential flow absorbed into the gas mask filter and predict the potential area that presents the dead zone. In this study, a three-dimensional model of the commercial gas mask filter was modeled using the computational aided design (CAD) software. Four different humidity ratios of 50%, 60%,70%, and 80% as well as Five different filter concentrations of 20ppm, 100ppm, 200ppm, 300ppm, and 1000 ppm were simulated. The computational fluid dynamic (CFD) method was governed by continuity and Navier-stokes equation to investigate the presence of the dead zone based on several flow parameters. The result showed that the effects of the pressure, velocity, temperature, humidity, and concentration on the gas mask filter were analyzed. The pressure drop is seen in the charcoal filter region which experiences high-velocity circulation. The highest effect on the pressure drop, humidity, and concentration was seen for the case V filter. The high humidity ratio with the pressure drop in the gas mask filter also decreases the efficiency of filter concentration even though the temperature is constant. The high humidity ratio in the mask filter will retain the heat inside the gas mask filter, thus reducing the life cycle of the filter.

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Section: Introductionmentioning

confidence: 99%

Analysis of Preferential Flow at the Front Mesh Cartridge of the Gas Mask Filter: Cases in Malaysia Climate Environment

Noraini¹,

Azmir

Taib

et al. 2022

ARASET

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Numerical and Experimental Investigation of Three-Dimensional Flow in Combined Protective Canister Filters

Sedlář¹,

Krátký²,

Langer

2022

Fluids

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This work deals with the numerical and experimental investigation of flow in the protective filters which combine fibrous pleats and the absorbent cartridge. The flow through the complete 3D geometry of all parts of the filters, including complex geometry of the pleats, is numerically modeled using high-quality computational grids. The sorbent filling, textile dividers as well as the material of filtration pleats are modeled as the porous media with the coefficients of the quadratic Forchheimer equation derived from the experiments in the laboratory located at the SIGMA Research and Development Institute. A comprehensive CFD analysis has been carried out using the ANSYS CFX package with the SST turbulence model, which combines advantages of both the high- and the low-Reynolds number turbulence models. The fully parametric description of the pleats enables the generation of high-quality structured computational grids for a wide range of pleat heights and widths and to use numerical shape optimization process. The numerical simulations show very good agreement of calculated and measured pressure drop for all variants of the complex geometry of the combined filter. To simulate a real application of the protective filter, the unsteady simulations which follow the human breathing pattern have been performed with the flow rate corresponding to the increased human activity.

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3D Numerical Simulation of Aerodynamic Characteristics of a Gas Filter

Cited by 2 publications

References 7 publications

Analysis of Preferential Flow at the Front Mesh Cartridge of the Gas Mask Filter: Cases in Malaysia Climate Environment

Analysis of Preferential Flow at the Front Mesh Cartridge of the Gas Mask Filter: Cases in Malaysia Climate Environment

Numerical and Experimental Investigation of Three-Dimensional Flow in Combined Protective Canister Filters

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