Prediction of initial particle size of the tungsten carbide synthesized by electrical discharge erosion method based on general dynamic equation of aerosols

Kabirinia, Farid; Shabgard, Mohammad Reza; Tabrizi, Nooshin Salman

doi:10.1016/j.powtec.2019.01.084

Cited by 9 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Recently, Kim et al used computational fluid dynamics (CFD) to simulate vehicle induced turbulence in traffic-related pollutant dispersion and first proposed that through superimposing the TPT of a single vehicle in the vehicle fleet, total TPT from multiple vehicles could be estimated [17]. In CFD code ANSYS Fluent, theoretical equations have been provided as available tools for turbulence simulation, such as RANS (Reynolds-averaged Navier-Stokes) [18][19][20][21], LES (large eddy simulations) [22][23][24], GDE (general dynamic equation) [25][26][27], and so on. However, existing studies have seldom made further efforts to explore the specific impact of TPT on emission diffusion.…”

Section: Introductionmentioning

confidence: 99%

Modeling Emission Flow Pattern of a Single Cruising Vehicle on Urban Streets with CFD Simulation and Wind Tunnel Validation

Shi

Sun

Zhang

et al. 2020

IJERPH

View full text Add to dashboard Cite

Transportation has become one of the primary sources of urban atmospheric pollutants and it causes severe diseases among city residents. This study focuses on assessing the pollutant dispersion pattern using computational fluid dynamics (CFD) numerical simulation, with the effect and results validated by the results from wind tunnel experiments. First, the wind tunnel experiment was carefully designed to preliminarily assess the flow pattern of vehicle emissions. Next, the spatiotemporal distribution of pollutant concentrations around the motor vehicle was modeled using a CFD numerical simulation. The pollutant concentration contours indicated that the diffusion process of carbon monoxide mainly occurred in the range of 0−2 m above the ground. Meanwhile, to verify the correctness of the CFD simulation, pressure distributions of seven selected points that were perpendicular along the midline of the vehicle surface were obtained from both the wind tunnel experiment and the CFD numerical simulation. The Pearson correlation coefficient between the numerical simulation and the wind tunnel measurement was 0.98, indicating a strong positive correlation. Therefore, the distribution trend of all pressure coefficients in the numerical simulation was considered to be consistent with those from the measurements. The findings of this study could shed light on the concentration distribution of platoon-based vehicles and the future application of CFD simulations to estimate the concentration of pollutants along urban street canyons.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling Emission Flow Pattern of a Single Cruising Vehicle on Urban Streets with CFD Simulation and Wind Tunnel Validation

Shi

Sun

Zhang

et al. 2020

IJERPH

View full text Add to dashboard Cite

show abstract

“…6б) от кристаллизации паровой фазы и пиролиза жидкости. Диаметры наночастиц, зависящие от температуры разрядного канала [20,30,41], мало влияют на средний диаметр частиц, так как находятся в виде агломератов, близких по размеру к сферическим частицам. Средний диаметр сферических частиц зависит от объема струи расплава, выбрасываемой из кратера, а также от свойств материала.…”

Section: морфология и гранулометрический состав порошковunclassified

“…После завершения искрового разряда пузырек пара схлопывается, а расплавленный и кипящий материал выбрасывается в межэлектродный промежуток и охлаждается со скоростью 10 6 -10 9 °С/с [39]. В результате закалки образуются наноразмерные [20,21,25,26,35,40,41], ультрамелкозернистые [27, 31,32,42,43] и аморфные частицы сферической формы. Эти сферические частицы, полученные методом ЭЭД, могут быть использованы в производстве ультрамелкозернистого твердого сплава, 3D-печати для изготовления индивидуальных изделий сложной формы [44][45][46] и нанесении покрытий методом высокоскоростного газопламенного напыления [47].…”

Section: Introductionunclassified

Influence of Liquid Composition and Discharge Energy on Process Performance, Composition, and Properties of Particles Formed During Electric Discharge Erosion of WC-5TiC-10Co Alloy

Dvornik¹,

Burkov²,

Mihailenko³

et al. 2023

EOM

View full text Add to dashboard Cite

Increasing the hardness and wear resistance of powder alloys and coatings through the use of ultrafine-grained powders and metastable phases is a promising way in powder metallurgy. This paper presents the results of the studies of the process of obtaining ultrafine powders by the electric discharge erosion of the cemented carbide waste WC-5TiC-10Co on a special installation. An empirical model that describes the dependence of the productivity of the process on the discharge energy and properties of the liquid is provided. The dependence of the chemical and phase compositions of the obtained powder on the composition of the used liquid and specific energy consumption has been investigated. The effect of the discharge energy on the morphological composition and average particle diameter has been examined. It is revealed that the formation of a metastable solid solution (W, Ti)C and a decrease in the concentration of cobalt induce an increase in the hardness of the resulting spherical particles from 1410HV0.05 to 2540HV0.05.

show abstract

“…A positively charged holes remain and produce an OH 0 radical by adsorbing OHions in the environment. The following reactions describe the production of hydroxyl radicals in titanium dioxide 33 :…”

Section: Effect Of Naphthalene Concentrationmentioning

confidence: 99%

Photocatalytic Degradation of Naphthalene By UV/Zno: Kinetics, Influencing Factors and Mechanisms

et al. 2021

View full text Add to dashboard Cite

Conventional wastewater treatment is not able to effectively remove Aromatic hydrocarbons such as Naphthalene, so it is important to remove the remaining antibiotics from the environment. The aim of this study was to evaluate the efficiency of UV/ZnOphotocatalytic process in removing naphthalene antibiotics from aqueous solutions.This was an experimental-applied study that was performed in a batch system on a laboratory scale. The variables studied in this study include the initial pH of the solution, the dose of ZnO, reaction time and initial concentration of Naphthalene were examined. The amount of naphthalene in the samples was measured using GC.The results showed that by decreasing the pH and decreasing the initial concentration of naphthalene and increasing the contact time, the efficiency of the process was developed. However, an increase in the dose of nanoparticles to 0.8 g/L had enhance the efficiency of the process was enhanced, while increasing its amount to values higher than 0.8 g/L has been associated with a decrease in removal efficiency.The results of this study showed that the use of UV/ZnOphotocatalytic process can be addressed as a well-organized method to remove naphthalene from aqueous solutions.

show abstract

Prediction of initial particle size of the tungsten carbide synthesized by electrical discharge erosion method based on general dynamic equation of aerosols

Cited by 9 publications

References 23 publications

Modeling Emission Flow Pattern of a Single Cruising Vehicle on Urban Streets with CFD Simulation and Wind Tunnel Validation

Modeling Emission Flow Pattern of a Single Cruising Vehicle on Urban Streets with CFD Simulation and Wind Tunnel Validation

Influence of Liquid Composition and Discharge Energy on Process Performance, Composition, and Properties of Particles Formed During Electric Discharge Erosion of WC-5TiC-10Co Alloy

Photocatalytic Degradation of Naphthalene By UV/Zno: Kinetics, Influencing Factors and Mechanisms

Contact Info

Product

Resources

About