Article
Environmental Sciences
Zeyuan Liu, Marco Di Luccio, Sergio Garcia, Jaume Puig-Bargues, Xiao Zhao, Alfredo Trueba, Tahir Muhammad, Yang Xiao, Yunkai Li
Summary: Magnetic Field (MF) technology shows significant effects in controlling calcium-silica fouling by reducing the content of calcium carbonate fouling and silica fouling, promoting the transformation of crystal structure and decreasing the accumulation of fouling. Permanent MF possesses higher anti-fouling ability compared to electric MF.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Longqian Xu, Shuai Peng, Yunfeng Mao, Yang Zong, Xiaomeng Zhang, Deli Wu
Summary: Flow-electrode capacitive deionization (FCDI) is an electrodriven technology for desalination of brackish water. This study proposes a magnetic field-assisted FCDI system (magnetic FCDI) using magnetic activated carbon (MAC) as flow electrodes, achieving enhanced desalination performance. The magnetic field assistance significantly improves the salt removal rate and stable desalination performance, as well as enables electrode particle regeneration.
Article
Engineering, Chemical
Wenbin Jiang, Xuesong Xu, David Johnson, Lu Lin, Huiyao Wang, Pei Xu
Summary: The study found that EMF was effective in controlling membrane scaling in RO systems, improving system performance under typical operating conditions. It significantly reduced membrane scaling, changed the nature of formed scales, and decreased the rate of decline in water permeability. Additionally, EMF treatment effectively removed pre-formed scales in pipelines and tanks, but had limited efficacy on pre-formed scales on RO membranes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Thermodynamics
Honggang Xing, Haozhe Jin, Xiaofei Liu, Rui Li, Mingxiang Wang, Hengyang Xiang, Chao Wang
Summary: This paper experimentally studies the heat transfer characteristics of heat exchange tubes with NH4Cl crystallization fouling. The results show that the local heat transfer coefficient varies with the circumferential angle and increases with fouling.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Chemical
Binghong Chen, Hongli Xie, Liguo Shen, Yanchao Xu, Meijia Zhang, Haiying Yu, Renjie Li, Hongjun Lin
Summary: A novel strategy was proposed for fabrication of a hydrophilic and conductive separation membrane with low cost, excellent filtration performance, and high chemical stability. The modified membrane showed outstanding separation efficiency, permeation flux, and cycle stability, especially when applied with an external electric field. External electric field significantly enhanced the filtration performance of the membrane, demonstrating improved flux recovery rate and stability.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Environmental Sciences
Tahir Muhammad, Lei Li, Yang Xiao, Yunpeng Zhou, Zeyuan Liu, Xin He, Nazir Ahmed Bazai, Yunkai Li
Summary: This study revealed that multiple fouling in brackish surface water distribution systems is mainly caused by strong interactions between different types of fouling, with binary interactions between precipitates and particulates contributing 51.1%, and ternary interactions between precipitates, particulates, and biofouling contributing 25.4%. Calcium silica, biomineralization, and bio-silicates play significant roles in fouling. Moreover, the use of low acid nitrogen fertilizers can disrupt the interaction of multiple fouling by altering the crystal parameters of precipitates and increasing repulsive forces between particulates, as well as disrupting microbial interactions in biofouling.
Article
Agronomy
Zeyuan Liu, Changjian Ma, Yang Xiao, Zhangzhong Lili, Tahir Muhammad, Yunkai Li
Summary: This study investigated the effect of chelated fertilizers on organic-inorganic fouling in brackish water drip irrigation systems (BWDIS). It was found that EDDHA-Fe effectively prevented multiple fouling, whereas FA-Fe reduced precipitate and particulate fouling and slightly increased organic fouling. AA-Fe decreased precipitate fouling but accelerated particulate and organic fouling. Chelated fertilizers demonstrated better anti-fouling effects compared to inorganic iron fertilizer, with FA-Fe being recommended for fouling mitigation and improving soil environmental health.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Energy & Fuels
Chengxu Qiu, Weixing Zhou, Dan Jin, Lin Long, Xuefeng Xiao
Summary: This study proposed a new Mullen field coupling method to inhibit the oxidation deposition of aviation fuel under high voltage environment. Experimental and numerical simulation results showed that discharge can reduce deposit diameter and decrease maximum coke formation on the reactor wall. The phenomenon of fuel stable discharge provided a new means for suppressing oxidation deposition.
Article
Engineering, Chemical
Jianglin Tu, Fan Fan, Cong Qi, Zi Ding, Lin Liang
Summary: This study experimentally investigated the potential application of magnetic nanofluids and twisted turbulators in heat exchangers. The results showed that the application of twisted turbulators and magnetic fields can effectively improve particle fouling resistance.
Article
Agronomy
Yayu Wang, Tahir Muhammad, Zeyuan Liu, Changjian Ma, Changsheng Zhang, Zhenhua Wang, Xin He, Yunkai Li
Summary: Brackish water drip irrigation (BWDI) is an effective method to overcome water scarcity and achieve sustainable agriculture development. This study evaluated the anti-clogging efficacy of compounding humic acid with conventional fertilizer in BWDI systems. The results showed that the humic acid compound fertilizer significantly reduced fouling in the drip irrigation system and the anti-clogging effect improved with increasing humic acid application.
AGRICULTURAL WATER MANAGEMENT
(2022)
Article
Thermodynamics
Rong Gao, Chao Shen, Xinlei Wang, Yang Yao
Summary: This study conducted long-term fouling tests on enhanced tubes and plain tubes to compare their heat transfer abilities under different operational conditions, revealing the effects of water velocity and tube geometries on the combined fouling process. Results showed that increasing water velocity continuously reduced the introduction period of fouling process, with different trends of asymptotic fouling resistance variation for enhanced tubes and plain tubes at varying water velocities.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Agronomy
Yayu Wang, Tahir Muhammad, Zeyuan Liu, Hongbang Liang, Xingpeng Wang, Zhenhua Wang, Changjian Ma, Yunkai Li
Summary: Water scarcity and deficiency of trace elements are major constraints to crop growth in arid and semi-arid areas. This study evaluated the mechanism of different types of trace element chelated fertilizers on the fouling of emitters in brackish water drip irrigation systems. The results showed that copper chelated fertilizer effectively alleviated the emitter fouling, while manganese chelated fertilizer aggravated the fouling. This study provides a new perspective on micronutrient fertilization in brackish water drip irrigation systems for sustainable development in arid and semi-arid areas.
AGRICULTURAL WATER MANAGEMENT
(2022)
Article
Thermodynamics
Rong Gao, Chao Shen, Xinlei Wang, Yang Yao
Summary: The research developed and validated two fouling prediction models based on experimental long-term tests, with high accuracy. Additionally, a valid concentration parameter for cooling water was defined, the impact of water velocity on fouling process was investigated, and multi-variable correlations for sticking probability and deposit bond strength were developed.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Afang Zhao, Na Zhang, Qiang Li, Lianwen Zhou, Huining Deng, Zhenghua Li, Yi Wang, Enguang Lv, Zhen Li, Mei Qiao, Jihua Wang
Summary: In this study, high-performance nanocomposite reverse osmosis membranes were fabricated by synthesizing functionalized carbon nanotubes and embedding silver nanoparticles. The membrane exhibited improved water permeability and NaCl rejection, as well as excellent fouling resistance to model foulants. The long-term performance stability of the membrane was attributed to the compatibility between carbon nanotubes and the polyamide matrix.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Yamin Li, Shengwei Sun
Summary: A multilayer-loaded hydrogel membrane with superior antifouling property is reported, which enhances the stability and fouling resistance of the membrane through cross-linking and super hydrophilic surface, showing practical application potential in the field of water treatment.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Thermodynamics
Cong Li, Jiali Wang, Chenhui Wang, Yanke Jin, Yina Yao, Rui Yang
Summary: This study investigates the impact of NaCl water droplets with various concentrations on a heated surface. The results show that the impact patterns can be categorized into different types, and models are established to predict the spreading behavior of droplets with different concentrations. Additionally, high concentration droplets exhibit more violent boiling and have lower residual energy and rebound time.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
C. Barrera, V. Castro, F. Escudero, J. J. Cruz, I. Verdugo, J. Yon, A. Fuentes
Summary: This study focuses on the characterization of soot maturity and sooting propensity of anisole fuel in a controlled laminar coflow diffusion flame. The results show that the spatial distribution of soot volume fraction is enhanced near the flame centerline, while soot production is promoted near the flame wings. The temperature increase also affects the maturity of soot particles.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Roman W. Morse, Jason Chan, Tiago A. Moreira, Jared J. Valois, Evan T. Hurlburt, Jean-Marie Le Corre, Arganthael Berson, Kristofer M. Dressler, Gregory F. Nellis
Summary: This study investigates the dryout of liquid film and the role of disturbance wave frequency. Experimental results indicate that the heat transfer coefficient associated with optimal boiling conditions is maximized when the surface is dry 5% of the time, independent of pulse amplitude and frequency. Liquid-film measurements, dryout statistics, and direct observation suggest that disturbance-wave frequency can be manipulated by density-wave oscillations in the flow field.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
E. J. Vega, J. M. Montanero
Summary: In this study, we experimentally investigated the bursting of a bubble covered with a surfactant. We found that the bubble bursting time is longer compared to a surfactant-free bubble due to interfacial elasticity. Furthermore, the Marangoni stress drives liquid flow that allows the jet to escape from the end-pinching mechanism within a certain surfactant concentration range.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Guofu Sun, Yi Zhan, Tomio Okawa, Mitsuhiro Aoyagi, Akihiro Uchibori, Yasushi Okano
Summary: Experiments were conducted on liquid jets ejected from oval nozzles to investigate the effects of nozzle orifice shape on jet behavior. The study found that the liquid jet exhibited different characteristics at different liquid flow rates. Correlations were established to predict the liquid jet state and characteristics of the secondary droplets produced during jet impact onto a solid surface. This research extended the available knowledge on liquid jet behavior.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Jeonghoon Lee, Laurent Zimmer, Takeshi Saito, Shinji Nakaya, Mitsuhiro Tsue
Summary: This study investigates the effects of spatial resolution on DMD amplitudes and spatial mode strengths, and proposes scaling factors to correct for the resolution differences. The results show that the proposed scaling factors successfully normalize the amplitudes and spatial modes, allowing for quantitative comparison of data obtained with different spatial resolutions. This study is significant for analyzing spatiotemporal data in various fields.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Yanli Zhao, Shibing Kuang, Xiaoliang Zhang, Mingjun Xu
Summary: This study experimentally investigates the dynamic process of water droplet impacting different wood surfaces and analyzes and discusses the impacting phenomena, phenomena distribution, droplet spreading dynamics, and maximum spread factor. The results show that the impacting process can be distinguished by Weber numbers and Reynolds numbers, and can be predicted by mathematical expressions.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Aakhash Sundaresan, Atul Srivastava, Callum Atkinson
Summary: This study presents the first-ever application of an advanced methodology, combining two-color laser-induced phosphorescence and particle image velocimetry, to investigate the heat transfer mechanisms on the surface of a cylinder placed inside a confined square duct. The technique allows for simultaneous measurement of velocity and temperature fields, reducing the complexity and costs associated with separately measuring temperature distributions. Experimental observations show that increasing the mass flow rate enhances heat removal from the cylinder surface, and increasing the cylinder heat input enhances heat transfer in the rear portion of the cylinder.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Harish K. Patel, Sukhjeet Arora, Rutuja Chavan, Bimlesh Kumar
Summary: This study experimentally analyzed the multiscale statistical assessment of scour depth surrounding spur dikes with downward seepage. The research found that seepage affects the morphological behavior and hydrodynamic characteristics of the channel bed, leading to changes in scour formation. The rate of scour depth changes initially increases with higher seepage velocity but eventually becomes constant over time.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Justas Sereika, Paulius Vilkinis, Gediminas Skarbalius, Algis Dziugys, Nerijus Pedisius
Summary: This study experimentally investigated the pulsatile flow structure based on a transitional-type cavity. It was found that the pulsation amplitude has a more significant effect on the dynamics of recirculation zone than the pulsation frequency. Pulsatile flow can reduce the size of the recirculation zone.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Merav Arogeti, Eran Sher, Tali Bar-Kohany
Summary: This study provides a detailed exploration of the events that occur when a droplet hits a dry solid surface of various small sizes, with a focus on the deposition, receding breakup, and prompt splash phases. By utilizing non-dimensional analysis and graphical representation, the boundaries between different events are defined, and criteria for differentiation based on target-to-drop ratio, Reynolds, and Webber numbers are presented.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Tianxiong Li, Fei Wen, Yingchun Wu, Botong Wen, Lei Wang, Jinxin Guo, Xuecheng Wu
Summary: This study investigates the structure of the flow field induced by a strut in a scramjet and its influence on flame stabilization. Experimental and numerical analyses reveal that the flow field exhibits features beneficial for flame stabilization, but the asymmetry of the flow poses a challenge to flame establishment.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Syed Ehtisham Gillani, Yasir M. Al-Abdeli
Summary: This study investigates the asymmetry in bluff-body stabilised annular jets and finds that swirl can significantly mitigate the asymmetry and restore the symmetry of the jets. Moreover, increasing the Reynolds number and the swirl intensity can both decrease the asymmetry of the jets.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Utsav Bhardwaj, Rabindra Kumar, Shyama Prasad Das
Summary: This study presents an experimental investigation on flooding phenomenon in a pulsating heat pipe (PHP) unit cell, and analyzes the impact of flooding on the performance of PHP. The study recognizes three different flooding mechanisms and finds that currently accepted correlations for predicting flooding velocity are inaccurate. The study emphasizes the need for further research on flooding in PHPs.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)
Article
Thermodynamics
Yunpeng Xue, Yongling Zhao, Shuo-Jun Mei, Yuan Chao, Jan Carmeliet
Summary: This study investigates the impact of building morphology on local climate, air quality, and urban microclimate. The researchers conducted an experimental investigation in a large-scale water tunnel, analyzing heat and flow fields using Laser-induced Fluorescence (LIF) and Particle Image Velocimetry (PIV). The findings show that factors such as canyon configuration, buoyant force, and approaching flow magnitude significantly influence fluid flow in street canyons, and the morphology of the street canyon dominates ventilation rate and heat flux. For example, changing the aspect ratio of a street canyon can lead to a significant change in air ventilation rate, ranging from 0.02 to 1.5 under the same flow conditions.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2024)