Article
Energy & Fuels
Dangfei Wang, Guorong Wang, Lin Zhong, Xing Fang
Summary: This study investigates the effect of underflow diameter on the performance of the hydrocyclone using computational fluid dynamics method. The results show that with the increase of back pressure, the split ratio decreases linearly, and the LAVV gradually increases. The larger the underflow diameter is, the smaller the pressure drop. However, beyond a back pressure of 60 kPa, the hydrocyclone may fail. The study provides insights for the design and optimization of hydrocyclone structure and hydrate production process parameters.
PETROLEUM SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Lin Liu, Lixin Zhao, Samuel Reifsnyder, Sheng Gao, Minzheng Jiang, Xueqiang Huang, Minghu Jiang, Yang Liu, Diego Rosso
Summary: Hydrocyclones use density gradients for centrifugal separation of dispersions in liquid, with optimization usually based on computational fluid dynamics that has long computational times. A new rapid optimization method, DUOM, reduced computational time by 31.1% compared to the common SFOM method.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Engineering, Chemical
Peikun Liu, Wenxiu Fu, Lanyue Jiang, Yuekan Zhang, Xiaoyu Li, Xinghua Yang, Bo Chen
Summary: This study uses numerical simulation to investigate the effect of overflow back pressure on the internal flow field and separation performance of hydrocyclones. The results indicate that increasing the overflow back pressure leads to higher energy consumption, increased solid phase yield, higher content of fine particles, lower content of coarse particles, and reduced separation accuracy of the hydrocyclones.
Article
Pharmacology & Pharmacy
Julia Marushka, Hana Hurychova, Zdenka Sklubalova, Jurjen Duintjer Tebbens
Summary: Flowability is an important property of powders, and this study aimed to find an accurate mathematical model for predicting the mass flow rate of pharmaceutical excipient sorbitol with different particle sizes. Validating with experimental data, a simple regression based on orifice size achieved the best results for individual particle size fractions. However, a fully quadratic model incorporating the interaction between particle and orifice size provided higher accuracy in a broader particle size range.
Article
Chemistry, Analytical
Muhammad Punhal Sahto, Wei Wang, Ali Nawaz Sanjrani, Chengxu Hao, Sadiq Ali Shah
Summary: This research evaluates the impact of throttling characteristics of small size orifice on stiffness and stability optimization of aerostatic thrust bearings. Results show that with an increase in the number and size of orifices, the damping characteristics of the bearings change accordingly.
Article
Agronomy
Hongbo Xu, Peng Zhang, Fengwei Gu, Zhichao Hu, Hongguang Yang, Enrong Mao, Yuefeng Du
Summary: A cyclone separation dust suppression device was proposed to reduce dust emission from peanut whole-feed combines, which cause air pollution and environmental change. A computational fluid dynamics model was established to simulate the dust capturing effect of the device, and a dust suppression test system was used to verify its effectiveness. The results showed that the device significantly improved the separation efficiency of dust particles and reduced their size, providing a reference for dust suppression optimization of agricultural machines.
Article
Engineering, Chemical
Qiang Zhao, Duanxu Hou, Baoyu Cui, Dezhou Wei, Tao Song, Yuqing Feng
Summary: The study developed an integrated multichannel inlet design for hydrocyclones, which significantly improves flow field symmetry, reduces short-circuit flow and circulation flow, and provides strong particle separation effects. Compared to traditional designs, the novel spiral inlet exhibits superior classification performance, including smaller cut-size, higher cut sharpness, and higher capacity.
ADVANCED POWDER TECHNOLOGY
(2021)
Review
Engineering, Multidisciplinary
Sravani Vemulapalli, Santhosh Krishnan Venkata
Summary: This paper focuses on the basics of flow measurement and the characteristics of orifice flow meter, which is widely used for flow measurement. It provides a detailed analysis of the effects of orifice plate dimensions, fluid types, and other parameters on measurement. Computational Fluid Dynamics is used to validate the performance of the orifice plate and enhance the understanding of its dynamic nature.
AIN SHAMS ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Duanxu Hou, Qiang Zhao, Peikun Liu, Lanyue Jiang, Baoyu Cui, Dezhou Wei
Summary: This study designs eight unique bottom profiles to regulate the particle circulating flow in the cylindrical hydrocyclone and explores the effects on flow field characteristics, particle spatial distribution, circulation flow rates, and grade efficiency. The findings suggest that adjusting the bottom profile parameters can improve separation performance by mitigating the misplacement of coarse particles and lowering turbulence intensity.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Environmental Sciences
Andres M. Aguirre-Mendoza, Duban A. Paternina-Verona, Sebastian Oyuela, Oscar E. Coronado-Hernandez, Mohsen Besharat, Vicente S. Fuertes-Miquel, Pedro L. Iglesias-Rey, Helena M. Ramos
Summary: The sizing of air valves is crucial for design in rapid filling processes. Mathematical models have been developed to simulate the behavior of air valves during filling processes, but the analysis of uncontrolled filling processes has not been considered.
Article
Engineering, Chemical
Mandakini Padhi, Narasimha Mangadoddy, Aubrey N. Mainza, Mohan Anand
Summary: This study explores the interaction of different density particles in a hydrocyclone affecting the separation process, particularly at high feed solids concentrations. Experimental data shows that the cut-size and beta parameters increase with higher feed solids concentration. The study also examines the suspension rheology and hindered settling rate to understand the influence of fine and coarse particle interaction on hydrocyclone performance.
Article
Computer Science, Interdisciplinary Applications
Tengfei Tang, Lei Lei, Li Xiao, Yili Peng, Hongjian Zhou
Summary: An optimization framework based on Optimized Latin Hypercube Sampling and Bayesian optimization is proposed for efficient design of throttle elements. The framework is validated through numerical cases and shows good performance in engineering problems, with computational fluid dynamics error less than 5% compared to experimental data.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Materials Science, Coatings & Films
S. Batkova, T. Kozak, S. Haviar, P. Mares, J. Capek
Summary: By changing the diameter of the exit orifice of the gas-aggregation source, the size and growth time of Cu nanoparticles can be influenced. The pressure to flow rate ratio is the key parameter in determining the growth of nanoparticles.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Hilman Syaeful Alam, Priyono Sutikno, Tubagus Ahmad Fauzi Soelaiman, Anto Tri Sugiarto
Summary: In this study, a hydrodynamic model was developed to predict bubble size distribution in a swirling-flow nanobubble generator. The model combined computational fluid dynamics and population balance method and was evaluated with several combinations of turbulence, coalescence, and breakage models. It was found that the combination of turbulence coalescence and Luo breakage models predicted the best. The selection of appropriate turbulence models improved the modeling accuracy.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2022)
Article
Engineering, Chemical
Lanyue Jiang, Peikun Liu, Yuekan Zhang, Xiaoyu Li, Xinghua Yang, Duanxu Hou, Bo Chen
Summary: The optimization of cone section structure is crucial for improving the separation performance of hydrocyclones, and the combination of multiple cone angles has more advantages than a single cone angle. In this study, CFD technology was used to simulate a biconical hydrocyclone with different cone section combinations. The influence of the combination form on internal multiphase flow motion was analyzed, and the effects of the structural parameters of double-cone hydrocyclone on separation efficiency were explored. The results showed that changing the cone section transition diameter could decrease the cut size, increase the total separation effectiveness, and improve the accuracy of separation.
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.