scholarly journals Investigation of dust particle removal efficiency of self-priming venturi scrubber using computational fluid dynamics

2018 ◽  
Vol 50 (5) ◽  
pp. 665-672 ◽  
Author(s):  
Sarim Ahmed ◽  
Hassan Mohsin ◽  
Kamran Qureshi ◽  
Ajmal Shah ◽  
Waseem Siddique ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Dust Particle ◽  
Removal Efficiency ◽  
Particle Removal ◽  
Venturi Scrubber

Dust particle removal efficiency of a venturi scrubber

2013 ◽  
Vol 54 ◽  
pp. 178-183 ◽  
Author(s):  
Majid Ali ◽  
Changqi Yan ◽  
Zhongning Sun ◽  
Haifeng Gu ◽  
Khurram Mehboob
Keyword(s):  
Dust Particle ◽  
Removal Efficiency ◽  
Particle Removal ◽  
Venturi Scrubber

CFD simulation of dust particle removal efficiency of a venturi scrubber in CFX

2013 ◽  
Vol 256 ◽  
pp. 169-177 ◽  
Author(s):  
Majid Ali ◽  
Changqi Yan ◽  
Zhongning Sun ◽  
Jianjun Wang ◽  
Haifeng Gu
Keyword(s):  
Dust Particle ◽  
Removal Efficiency ◽  
Cfd Simulation ◽  
Particle Removal ◽  
Venturi Scrubber

Improving the design of a pickup head for particle removal using computational fluid dynamics

2011 ◽  
Vol 225 (4) ◽  
pp. 939-948 ◽  
Author(s):  
B Wu ◽  
J Men ◽  
J Chen
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Pressure Drop ◽  
Removal Efficiency ◽  
Inclination Angle ◽  
Gas Flow ◽  
Road Surface ◽  
Particle Model ◽  
Particle Removal ◽  
Inclination Angles

The purpose of this article is to optimize the design of a pickup head that removes particles from road surface. A validated computational fluid dynamics model was proposed to evaluate the particle removal performance of the designed pickup head with different inclination angles. The gas-particle flow through the pickup head was modelled using the EulerianLagrangian approach. The realizable k model and the discrete particle model were adopted to simulate gas flow field and solid particle trajectories, respectively. The results indicate that the inclination angle of the rear edge wall and the pressure drop across the pickup head have great impact on the particle removal performance. Both the particle overall removal efficiency and the grade efficiency increase with the increment of inclination angle, and higher pressure drop can pick up more particles from the road surface, but it would induce unnecessary energy consumption. Therefore, it is necessary to design a pickup head with high removal efficiency and low pressure drop. Through simulation, the optimal angle should be 135 for the range of the inclination angle in this study, and pressure drop is about 2400Pa. Furthermore, more information can be acquired for pickup head design.

Numerical Investigation of Dusts Removal from Tramway Surface by Street Vacuum Sweeper

2011 ◽  
Vol 236-238 ◽  
pp. 1619-1622 ◽  
Author(s):  
Bo Fu Wu ◽  
Jin Lai Men ◽  
Jie Chen
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Numerical Model ◽  
Pressure Drop ◽  
Removal Efficiency ◽  
Pressure Drops ◽  
Operational Safety ◽  
Airflow Field ◽  
Computational Fluid Dynamics Cfd ◽  
Cfd Method

In order to enhance the operational safety of tram vehicle and reduce the wear of guide wheels mounted on the vehicle, it is necessary to remove particles such as dusts and silts from tramway surface. The aim of this paper is to evaluate the effectiveness of street vacuum sweeper for sucking up dusts from tramway surface. A numerical model was developed based on dusts removal process. Under different pressure drops across the pickup head of the street vacuum sweeper, the flow field and dusts removal efficiency were analyzed with computational fluid dynamics (CFD) method. The numerical results show that a higher pressure drop can improve the airflow field in the pickup head and results in higher dusts removal efficiency, but higher pressure drop definitely need more energy. Therefore, a balance should be taken into consideration.

scholarly journals Structural improvements on hydrodynamic separators: a computational fluid dynamics approach

2016 ◽  
Vol 74 (12) ◽  
pp. 2898-2908
Author(s):  
Joseph Albert Mendoza ◽  
Dong Hoon Lee ◽  
Sang-Il Lee ◽  
Joo-Hyon Kang
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fine Particles ◽  
Swirling Flow ◽  
Particle Removal ◽  
Gravity Settling ◽  
Large Particles ◽  
Removal Efficiencies ◽  
Structural Configurations ◽  
Plate Type

Hydrodynamic separators (HDSs) have been used extensively to reduce stormwater pollutants from urbanized areas before entering the receiving water bodies. They primarily remove particulates and associated pollutants using gravity settling. Two types of HDSs with different structural configurations of the inner vortex-inducing components were presented in this study. One configuration consisted of a dip cylindrical plate with a center shaft while the other one has a hollow screen inside. With the help of computational fluid dynamics, the performance of these different types of HDSs have been evaluated and comparatively analyzed. The results showed that the particle removal efficiency was better with the cylindrical plate type HDSs than the screen type HDSs because of the larger swirling flow regime formed inside the device. Plate type HDSs were found more effective in removing fine particles (∼50 μm) than the screen type HDSs that were only efficient in removing large particles (≥250 μm). Structural improvements in a HDS such as increase in diameter and angle of the inlet pipe can enhance the removal efficiencies by up to 20% for plate type HDS while increase in the screen diameter can increase removal efficiencies of the screen type HDS.

Experiment on Removal Efficiency of Dust Particle Using a Ventilation Test House

2013 ◽  
Vol 726-731 ◽  
pp. 2173-2176
Author(s):  
Yang Lv ◽  
Genta Kurihara ◽  
Hiroshi Yoshino
Keyword(s):  
Dust Particle ◽  
Removal Efficiency ◽  
Experimental Studies ◽  
Exhaust System ◽  
Clear Relationship ◽  
Particle Removal ◽  
Particle Count ◽  
Test House ◽  
Animal Dander ◽  
Ventilation Systems

Dust particle which includes corpses and feces of the mite, animal dander, cockroaches, and mould spores can reach the lung of human and then trigger asthma disease easily. In this research, experimental studies were carried out in order to examine particle removal efficiency in a room with two ventilation systems: a ceiling exhaust system and a slit exhaust system. The results indicated that there was no clear relationship between removal efficiency and two different outlet locations. Also, from the results after the decay, the particle count in the case of the ceiling exhaust was higher than that in the case of the slit exhaust.

scholarly journals Minimising exposure to droplet and aerosolised pathogens: a computational fluid dynamics study

2020 ◽  
Author(s):  
Paolo Perella ◽  
Mohammad Tabarra ◽  
Ertan Hataysal ◽  
Amir Pournasr ◽  
Ian Renfrew
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Suction Catheter ◽  
Particle Removal ◽  
Ansys Fluent ◽  
Protective Shield ◽  
Pragmatic Clinical Trials ◽  
Fluent Software ◽  
Dynamics Modelling ◽  
Suction Flow

BackgroundHazardous pathogens are spread in either droplets or aerosols produced during aerosol generating procedures (AGP). Adjuncts minimising exposure of healthcare workers to hazardous pathogens released during AGP may be beneficial. We used state-of-the-art Computational Fluid Dynamics modelling to optimise the performance of a custom-designed shield.MethodsWe modelled airflow patterns and trajectories of particles (size range 1–500µm) emitted during a typical cough using Computational Fluid Dynamics (ANSYS Fluent software), in the presence and absence of a protective shield enclosing the head of a patient. We modelled the effect of different shield designs, suction tube position, and suction flow rate on particle escape from the shield.ResultsUse of the shield prevented escape of 99.1–100% of particles, which were either trapped on the shield walls (16–21%) or extracted via suction (79–82%). At most, 0.9% particles remained floating inside the shield. Suction flow rates (40–160L min−1) had no effect on the final location of particles in a closed system. Particle removal from within the shield was optimal when a suction catheter was placed vertically next to the head of the patient. Addition of multiple openings in the shield reduced the purging performance from 99% at 160 L min−1 to 67% at 40 L min−1.ConclusionComputational fluid dynamics modelling provides information to guide optimisation of the efficient removal of hazardous pathogens released during AGP from a custom-designed shield. These data are essential to establish before clinical use and/or pragmatic clinical trials.

Sign in / Sign up

Export Citation Format

Share Document