Article
Engineering, Chemical
Bingjie Wang, Ziqiang Hu, Shijie Yan, Xiaoyong Yang, Shaohuan Tan, Zhishan Bai
Summary: This paper systematically studied the internal flow field characteristics of a hydrocyclone and the effect of continuous phase viscosity on particle classification efficiency using computational fluid dynamics. The results demonstrated that the hydrocyclone not only participated in particle classification but also indirectly promoted particle growth. Satisfied classification efficiency was obtained by adopting the optimized condition parameter.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Energy & Fuels
Yu-long Chang, Wang-qiang Ti, Hua-lin Wang, Shou-wei Zhou, Yuan Huang, Jian-ping Li, Guo-rong Wang, Qiang Fu, Hai-tao Lin, Ji-wei Wu
Summary: This study aims to improve the performance of a hydrocyclone suitable for subsea gas hydrate extraction by studying the effects of operating and geometric parameters through experiments and computational fluid dynamics (CFD) method. Results show that the optimal flow rate is 7 m(3)/h, and separation efficiency decreases while pressure drop increases as the solid content of the inlet increases.
Article
Engineering, Chemical
Peikun Liu, Ying Song, Lanyue Jiang, Xinghua Yang, Yuekan Zhang, Xiaoyu Li, Rui Zhang
Summary: This study investigates the wear of various components of the hydrocyclone using a combination of numerical simulation and experimental study. The results show that the wear degree varies among different components and exhibits specific distribution patterns. The findings provide useful guidance for improving the performance of the hydrocyclone and reducing production accidents.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Xinfeng Lv, Lan Xiang, Tiefeng Wang, Shanjun Du
Summary: In the face of decreasing high-quality phosphate rock resources, beneficiation and purification of low-grade phosphate ore can alleviate the scarcity for strategic phosphorus resources. The study investigated the industrial beneficiation of low-grade phosphate ore using a novel hydraulic barrier-hydrocyclone. Computational fluid dynamics (CFD) simulation showed that the semi-through hydraulic barrier (S-Hb) hydrocyclone had optimal performance with reduced short-circuit flow, increased classification efficiency, and improved separation sharpness. Practical industrial experiments confirmed the effectiveness of the hydrocyclone in upgrading the phosphate ore. The investigation provides an economically viable route for beneficiating low-grade phosphate ore and supporting sustainable development of phosphorus resources.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Acoustics
Yongfei Yang, Weidong Shi, Linwei Tan, Wei Li, Songping Chen, Bo Pan
Summary: This study investigates the shear cavitation in submerged high-pressure water jet using different turbulence models, with the finding that both the DDES and SBES models can effectively capture vortexes in the shear layer, with the SBES model providing more turbulence details. Experimental results show that under low cavitation number conditions, an intensive shear layer is formed at the nozzle exit with a relatively high mass transfer rate in the region.
SHOCK AND VIBRATION
(2021)
Article
Thermodynamics
P. Katare, A. Krupan, A. Dewasthale, A. Datar, A. S. Dalkilic
Summary: This study focuses on the industrial application of hydrocyclones for fine filtration, designing a hydrocyclone for cleaning machine filtration system and analyzing its performance efficiency through computational fluid dynamics software. Results show increasing pressure from center to wall and initial increase then decrease in velocity inside the cyclone. The study concludes with an efficiency of 76.19% for the hydrocyclone.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Yuekan Zhang, Mingyuan Xu, Yaoxu Duan, Xinghua Yang, Junru Yang, Xiangcheng Tang
Summary: The study showed that as the feed rate increased, static pressure, tangential velocity, and radial velocity also increased, facilitating the separation effect of the flow field. However, the increase in feed rate also led to an increase in axial velocity and turbulent kinetic energy, which was not conducive to improving separation accuracy.
Article
Mechanics
Joseph Amponsah, Pius Ohene Darko
Summary: This study investigates the radial velocity profiles near the impeller tip in a baffled stirred tank through experimental measurements and computational fluid dynamics (CFD) simulations. The results show that double turbine impellers generate localized turbulence, while pitched blade turbines with down-pumping produce high-intensity turbulence zones throughout the tank. The CFD simulations align closely with experimental data and provide further insight into flow patterns.
Article
Multidisciplinary Sciences
Heng Zhang, Hongjian Ni
Summary: Solid phase is an important component of drilling fluid, but a high solid content can lead to decreased rate of penetration and waste of energy. This paper presents a new near-bit hydrocyclone (NBHC) for solid-liquid separation based on hydrocyclone technology. The NBHC can separate solids, especially plugging particles, from the drilling fluid, reducing the solid content that flows into the bit and improving the rock-breaking environment and rate of penetration. Simulation results show that the NBHC has a strong solid separation ability, with a mass separation efficiency of 79.30%. The study also analyzes the effects of various parameters on the separation efficiency and pressure drop of the NBHC.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Civil
Ehsan Afaridegan, Nosratollah Amanian, AmirHamzeh Haghiabi, Abbas Parsaie, Alireza Goodarzi-Mohammadi
Summary: In this study, the flow characteristics over modified semi-cylindrical weirs were investigated using computational fluid dynamics simulations. The results were compared to laboratory observations and showed good agreement. Different turbulence models were evaluated and the standard k-epsilon model performed the best. The analysis of streamline patterns and pressure distribution provided insights into the flow behavior and hydraulic characteristics of the weirs.
WATER RESOURCES MANAGEMENT
(2023)
Article
Engineering, Marine
Oguz Simsek, Huseyin Islek
Summary: In this study, dam-break flows on different downstream/upstream water depth ratios and obstacle shapes are modeled using 2D and 3D numerical simulations. The Finite Volume Method is applied for governing equations and the Volume of Fluid method is used for calculating the water-air interfaces. Four turbulence models (RNG, SST, DES, LES) are employed for the simulations. Comparison with experimental results shows that DES is more successful for all depth ratios, while SST performs better for triangular and trapezoidal obstacles. The 3D LES model is found to be more compatible with experimental water surface profiles compared to the other models. Overall, turbulence models considering strain tensor are successful in modeling dam-break propagation waves.
Article
Engineering, Multidisciplinary
Ganesh Jogur, Devershi Mourya, R. Alagirusamy, Apurba Das
Summary: The study demonstrates the superiority of using nozzles with forwarding airflow to produce commingled yarns for thermoplastic composite applications. Nozzle configurations I and III exhibit better performance, mixing both reinforcement and matrix filaments effectively, and providing better yarn quality parameters at low processing pressure.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Environmental
Narendra Khatri, Mandeep Singh, Sumit Pokhriyal, Eldon R. Rene
Summary: This paper presents a computational fluid dynamics (CFD) study on the classification of primary sludge using a Rietema type hydrocyclone in an activated sludge process (ASP) based wastewater treatment plant. The CFD simulation was performed to study various parameters and validate the experimental results. The installation of the hydrocyclone for primary sludge classification resulted in energy savings of 3194 kWh/year for wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yan Zheng, Fanfei Min, Hongzheng Zhu
Summary: A novelty-designed wide-neck classifier (WNC) was proposed to enhance the passing ability and classification efficiency of fine particles. Computational fluid dynamics (CFD) was used to study the flow field and velocity distribution in the newly designed WNC. The experimental results showed that the classification efficiency increased with increasing feed velocity but decreased as the feed concentration, spigot diameter, and overflow outlet diameter increased. Predictive models for classification efficiency influenced by operational and structural parameters were constructed at high correlation coefficients, with an average error of 0.28%. These results can provide valuable insights into the development of mineral classification.
Article
Engineering, Mechanical
Dennis Fischer, Stephan von Goeldel, Georg Jacobs, Andreas Stratmann
Summary: This study examines the oil flow around a rolling point contact under limited oil volume and in dependence of oil wettability using CFD simulations. The effects of lubricant starvation at high rolling speeds are investigated, focusing on the replenishment of oil.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jing Chang, Huaizhi Shao, Bo Liu, Rogerio Manica, Zhen Li, Qingxia Liu, Zhenghe Xu
Summary: The self-assembly of platy clay particles is influenced by the anisotropic surface charging properties of the particles, which can be controlled by solution pH. By adjusting pH, desired nanostructures can be formed through self-assembly of clay particles. This pH-dependent self-assembly can also be applied to other platy particles with anisotropic surface properties.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Chemical
Yi Lu, Rui Li, Rogerio Manica, Qingxia Liu, Zhenghe Xu
Summary: CO2-responsive surfactants can enhance heavy oil recovery by adjusting their interfacial activity and can be partially recycled for water treatment, showing promising applications in various industries.
Article
Chemistry, Physical
Fan Yang, Xiao He, Wen Tan, Gang Liu, Tingting Yi, Qingye Lu, Xiaoting Wei, Hanjie Xie, Qiurong Long, GuiChao Wang, Chuanfei Guo, Erica Pensini, Zhouguang Lu, Qingxia Liu, Zhenghe Xu
Summary: The unique adhesion-shielding method was used to synthesize magnetic Janus nanoparticles (IM-JNPs) with excellent interfacial properties and efficient removal of oily wastewater under an external magnetic field.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Subhash Ayirala, Abdulkareem Sofi, Zuoli Li, Zhenghe Xu
Summary: The use of surfactants and surfactant-polymers on carbonate surfaces can enhance oil recovery efficiency by altering wettability and reducing interfacial tension, as demonstrated by microscale experiments in this study.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Environmental Sciences
Xin Cong, Sifang Zhou, Tong Wang, Guibin Pang, Zhenghe Xu
Summary: The study found that biochar application can decrease preferential flow, improve soil water retention capacity, enhance nutrient retention, and increase crop yield. This research is of great significance for improving crop water and fertilizer use efficiency, as well as protecting the ecological environment.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2022)
Article
Engineering, Chemical
Jessica V. Fuentes, Edgar B. Zamora, Anirban Chakraborty, Gerardo Zavala, Zhenghe Xu, William McCaffrey, Zuoli Li, Flavio Vazquez, Cesar A. Flores
Summary: A novel random acrylic terpolymer based on butyl acrylate, 2-(dimethylamino)ethyl acrylate, and 2-carboxyethyl acrylate monomers showed efficient demulsifying properties in heavy crude oils with stable water-in-oil emulsions. The best water removal performance was achieved with terpolymers containing 90-80% of the hydrophobic monomer B and small amounts of the hydrophilic monomers Ae and Ce. The correlation between molecular parameters of the terpolymers and physicochemical parameters of the crude oils allows for accurate prediction of water removal efficiency, aiding in selecting the best demulsifier for a specific petroleum stream.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Hongbiao Tao, Yue Yang, Shengming Xu, Qi Liu, Guoyong Huang, Zhenghe Xu
Summary: The study introduces a selective leaching strategy based on defect-induced lattice instability, allowing simultaneous recovery and separation of high-value metals from spent cathode materials without the need for a separation step. This technique demonstrates high recoveries of lithium, nickel/cobalt, and manganese using different leaching agents and provides new insights for developing advanced recycling strategies.
Article
Engineering, Environmental
Jiming Lu, Prashant Kumar Mishra, Timothy N. Hunter, Fan Yang, Zhouguang Lu, David Harbottle, Zhenghe Xu
Summary: This study demonstrates the effectiveness of functionalized bio-sorbents derived from pomelo peel in rapidly and efficiently decontaminating water, with the potential for large-scale remediation strategies of contaminated wastewater.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Yi Lu, Rui Li, Rogerio Manica, Zhiqing Zhang, Qingxia Liu, Zhenghe Xu
Summary: This study demonstrates the feasibility and advantages of using CO2-responsive surfactants in water-based oil sands extraction to enhance bitumen recovery. By adjusting interfacial tension, both bitumen liberation and aeration can be significantly improved. The use of these surfactants not only increases the recovery rate but also produces cleaner bituminous froths and reduces energy consumption.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Xiangyu Chen, Xinrui Ma, Tony Yeung, Dejun Sun, Zhenghe Xu
Summary: This study presents a method of using CO2-responsive microemulsions to treat oil-contaminated soils. The method effectively cleans oil-contaminated soils at low energy consumption and allows for the recovery of value-added oil.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Wen Tan, Fan Yang, Tingting Yi, Gang Liu, Xiaoting Wei, Qiurong Long, Yi Liu, Yingzhi Li, Chuanfei Guo, Kun Liu, Zhouguang Lu, Qingxia Liu, Zhenghe Xu
Summary: Carbon coating is a common method to improve the performance of Li-ion batteries, but conventional carbon coatings are brittle. This study proposes a scalable and low-cost synthesis method to deposit a highly-elastic fullerene-like protective carbon layer on silicon nanoparticles, which exhibits high cycle stability and capacity retention.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wen Tan, Lina Wang, Zhouguang Lu, Fan Yang, Zhenghe Xu
Summary: Researchers have successfully synthesized a stable and scalable Si/C nanocomposite for lithium-ion battery anodes by controlling the concentration of asphaltenes. The resulting electrode exhibits high reversible capacity, capacity retention, and stability under high mass loading and area capacity conditions.
Article
Chemistry, Physical
Wen Tan, Fan Yang, Zhouguang Lu, Zhenghe Xu
Summary: This study improves the electrochemical performance of carbon-coated silicon anodes by forming uniform carbon coatings with different degrees of graphitization. The high elasticity and high Li+ diffusion coefficient of the carbon coating greatly enhance the stability and rate capability of the electrode.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Lingfei Liu, Mingshan Zhang, Zhouguang Lu, Zhehui Jin, Yi Lu, Dejun Sun, Zhenghe Xu
Summary: This study investigates the impact of the molecular structure of pseudo-Gemini surfactants (PGS) on the stability and switchability of emulsions. The findings suggest that increasing the spacer length improves the interfacial activity, while introducing an amino group enhances the CO2 responsivity of PGS.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yunhui Hua, Zhenghe Xu, Baojun Zhao, Zuotai Zhang
Summary: An electrochemical approach was developed to evaluate redox abilities and a salt leaching method using water-soluble NH4Fe(SO4)(2) as a redox intermediate was proposed for the synergistic recovery of valuable metals from spent lithium-ion batteries, achieving high efficiency and selectivity.