Article
Engineering, Chemical
Suyang Pan, Jiliang Ma, Daoyin Liu, Xiaoping Chen, Cai Liang
Summary: This paper studies the liquid transport behaviors in a top-sprayed fluidized bed using bed conductance analysis, pressure fluctuation analysis, and bubble image processing. The results show that liquid initially gets trapped in agglomerates before converting to free liquid and spreading from the upper-middle bed to the bottom bed. The disintegrating pattern of agglomerates affects the increase and saturation of free liquid in the bed. The liquid transport process is accelerated by increasing superficial air velocity and particle diameter, while it slows down with increased liquid viscosity and surface tension.
Article
Engineering, Chemical
Paula Berton, Yi N. Chen, Shokoufeh Manouchehr, Kyle Wong, Zohrab Ahmadi, Steven L. Bryant, Robin D. Rogers
Summary: The exploitation of mineable oil sands in Canada has generated significant tailings in ponds, posing environmental and financial burdens. The use of an ionic liquid designed to remove water from the fine tailings shows promise in improving the efficiency and operational flexibility of the dewatering process. This approach allows for targeted removal of water from the tailings, enhancing overall remediation efforts.
Article
Engineering, Chemical
Jiangtian Hou, John R. Grace, Xiaotao Bi
Summary: The electrostatic charge density and wall coverage of polyethylene and glass particles fluidized by different gases were investigated. Argon caused the least wall fouling, indicating the importance of dielectric breakdown of fluidizing gas on particle charge buildup. For polyethylene particles, wall fouling was strongly correlated with charge density, while for glass particles, the correlation was weaker. Moisture content in the gas had a more significant effect on wall fouling for glass particles, possibly due to adsorbed water layer. Highly charged small particles had a high tendency to attach to the wall.
Article
Energy & Fuels
Litao Chen, Carolyn A. Koh, Baojiang Sun
Summary: The plugging mechanism of water-continuous hydrate systems was extensively analyzed, and hydrate deposition and sloughing were observed to be the main cause of plugging.
Article
Engineering, Chemical
Tian Nan, Jesse Zhu
Summary: An inverse liquid-solid circulating conventional fluidized bed (I-CCFB) is realized by injecting particles from the top of a conventional liquid-solid fluidized bed, which is operated in a newly developed circulating conventional fluidization regime. The I-CCFB can achieve a higher solids holdup compared to both conventional and circulating liquid-solid fluidized beds. A new flow regime map is presented, including the I-CCFB and a variety of other liquid-solid fluidized beds.
Article
Engineering, Chemical
Tian Nan, Jesse Zhu
Summary: The hydrodynamics of inverse liquid-solid circulating fluidized bed were studied comprehensively, revealing specific flow patterns and solid distribution laws, influenced by factors such as particle size and flow velocity.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Tian Nan, Jesse Zhu, Dominic Pjontek, Salah Srabet, Haohao Zhou
Summary: The hydrodynamics of an IGLSCFB were studied, and the results showed that the gas and solids holdups in the bed were uniform under lower gas and liquid velocities, but became non-uniform at higher velocities. The gas holdup increased with gas and liquid velocities, while the solids holdup increased with solids circulation rate and gas velocity, but decreased with liquid velocity.
Article
Geosciences, Multidisciplinary
I. B. Smith, D. E. Lalich, C. Rezza, B. H. N. Horgan, J. L. Whitten, S. Nerozzi, J. W. Holt
Summary: The bright radar reflections observed beneath the south polar layered deposits on Mars were proposed to be caused by hydrated and cold clay-rich deposits, rather than liquid water. Experimental measurements and wave propagation modeling showed that these minerals, cooled to 230 K, have the potential to cause the bright reflections and are present in south polar orbital visible-near infrared reflectance spectra.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Engineering, Chemical
Lin Wang, Jesse Zhu, George Nakhla, Yuanyuan Shao
Summary: This study investigated the hydrodynamic characteristics of liquid-solid and gas-liquid-solid inverse fluidized beds with bare particles and particles with biofilm. The presence of biofilm was found to increase the fluidizability of the bed layers, suggesting an improvement in the fluidization behavior.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Thermodynamics
Alireza Razmavar, Gurubalan Annadurai, Adesola Olufade, Carey J. Simonson
Summary: Crystallization fouling is a significant factor in the design and operation of membrane-based separation processes. This paper presents a semi-empirical model that predicts the fouling rate of membranes in liquid-to-air membrane energy exchangers (LAMEEs), and validates the model using experimental data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Chemical
Frederik Zafiryadis, Anker Degn Jensen, Weigang Lin, Elisabeth Akoh Hove, Morten Boberg Larsen, Hao Wu
Summary: This study utilizes the Eulerian-Lagrangian multiphase particle-in-cell method to simulate the injection of a gas-liquid spray into a gas-solid fluidized bed. The model accurately predicts the gas temperature distribution within the injection region, but discrepancies may arise due to the presence of wet particle agglomerates in the spray region.
CHEMICAL ENGINEERING SCIENCE
(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, Environmental
Isaac A. Loge, Jakob R. Bentzon, Christopher G. Klingaa, Jens H. Walther, Benaiah U. Anabaraonye, Philip L. Fosbol
Summary: Crystallization fouling is a significant challenge in various industries, and understanding crystal formation is crucial for prevention and maintenance. The study demonstrates that deposition rates depend on detachment mechanisms and distribution characteristics. The influx of material and surface morphology govern deposition pattern.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Changzhi Bai, Hangil Park, Liguang Wang
Summary: A strong correlation between an index and the solids recovery in solid bowl centrifugation was identified based on analysis of literature data. A new solids concentration measuring tool was developed to measure the solids concentration of a slurry, showing high accuracy and reliability.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Zhengliang Huang, Jingyuan Sun, Xiaoqiang Fan, Yao Yang, Qiang Shi, Jianan Cheng, Jingdai Wang, Yongrong Yang
Summary: The characteristics and transition of particle fluidization in a hot gas-solid fluidized bed with liquid injection were investigated by analyzing the pressure drop, temperature distribution, and agglomerate weight fraction. It was found that the behavior of particle fluidization was controlled by liquid bridge force at low induction heating power, but both solid bridge force and liquid bridge force were involved in fluidization at higher induction heating power. The particle fluidization behavior exhibited four types with increasing liquid injection flowrate. Moreover, the transition behaviors between different fluidization types were studied and four fluidization regions were identified. A dimensionless number zeta was proposed to establish the connection between lab-scale experiments and industrial fluidized beds, providing guidelines for safe operation.
Article
Energy & Fuels
H. Zhou, I. E. E. de Sera, C. A. Infante Ferreira
Article
Thermodynamics
D. M. van de Bor, C. A. Infante Ferreira, Anton A. Kiss
Article
Thermodynamics
Dennis M. van de Bor, Catalina Vasilescu, Carlos Infante Ferreira
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2015)
Article
Thermodynamics
A. H. Mosaffa, L. Garousi Farshi, C. A. Infante Ferreira, M. A. Rosen
ENERGY CONVERSION AND MANAGEMENT
(2016)
Article
Thermodynamics
Hongxia Zhou, Catalina Vasilescu, Carlos Infante Ferreira
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2016)
Article
Thermodynamics
V. Gudjonsdottir, C. A. Infante Ferreira, Glenn Rexwinkel, Anton A. Kiss
Review
Thermodynamics
Carlos Infante Ferreira, Dong-Seon Kim
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2014)
Review
Thermodynamics
Catalina Vasilescu, Carlos Infante Ferreira
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2014)
Article
Thermodynamics
L. Garousi Farshi, C. A. Infante Ferreira, S. M. S. Mahmoudi, M. A. Rosen
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2014)
Article
Green & Sustainable Science & Technology
A. H. Mosaffa, L. Garousi Farshi, C. A. Infante Ferreira, M. A. Rosen
Article
Energy & Fuels
Meng Wang, Carlos A. Infante Ferreira
Article
Engineering, Chemical
Hongxia Zhou, Carlos Infante Ferreira
CHEMICAL ENGINEERING SCIENCE
(2017)
Proceedings Paper
Engineering, Mechanical
Meng Wang, Carlos A. Infante Ferreira
12TH IIR GUSTAV LORENTZEN NATURAL WORKING FLUIDS CONFERENCE
(2016)
Proceedings Paper
Thermodynamics
Hongxia Zhou, Carlos Infante Ferreira
11TH IIR GUSTAV LORENTZEN CONFERENCE ON NATURAL REFRIGERANTS (2014): NATURAL REFRIGERANTS AND ENVIRONMENTAL PROTECTION
(2014)
Proceedings Paper
Thermodynamics
C. W. M. Nefs, D. M. Van de Bor, C. A. Infante Ferreira
11TH IIR GUSTAV LORENTZEN CONFERENCE ON NATURAL REFRIGERANTS (2014): NATURAL REFRIGERANTS AND ENVIRONMENTAL PROTECTION
(2014)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
