Article
Chemistry, Multidisciplinary
Farqad T. Najim, Hayder I. Mohammed, Hussein M. Taqi Al-Najjar, Lakshmi Thangavelu, Mustafa Z. Mahmoud, Jasim M. Mahdi, Mohammadreza Ebrahimnataj Tiji, Wahiba Yaici, Pouyan Talebizadehsardari
Summary: This research investigates the potential enhancement of circular fins on intensifying the PCM thermal response in a vertical triple-tube casing. The results reveal that changing the fin dimensions and distribution patterns can improve the charging rate, storage rate, and temperature distribution of the PCM, leading to better performance.
Article
Energy & Fuels
Somayeh Davoodabadi Farahani, Amir Davoodabadi Farahani, Amirhossein Jazari Mamoei, Wei-Mon Yan
Summary: In this work, the numerical analysis of heat transfer and melting enhancement of phase change material (PCM) in a cylindrical thermal energy storage system was studied. The RT82 was used as PCM and the finite volume method was employed for numerical solution. The effects of strip fins, Fe3O4 nanoparticles, and uniform and non-uniform magnetic fields on PCM melting were investigated. The results showed that the new arrangement of strip fins reduced the melting time by about 51%. Addition of nanoparticles improved the melting time by 15-22%. The use of uniform magnetic field had little effect, but in finned cases it doubled the amount of releasing energy compared to those without magnetic field. The variable magnetic field improved the phase change process by 39% and a >60% reduction in melting time was observed with parabolic changes in the z-direction of magnetic field origin (electric voltage).
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Somayeh Davoodabadi Farahani, Amir Davoodabadi Farahani, Ebrahim Hajian, Hakan F. Oztop
Summary: This paper investigates the melting behavior of phase change materials inside a 3D cylindrical enclosure and proposes novel fin shapes to enhance the melting rate. The results show that employing fins increases the heat transfer area and improves the melting rate.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Somayeh Davoodabadi Farahani, Amir Davoodabadi Farahani, Fatemeh Tayebzadeh, Amir H. Mosavi
Summary: The study showed that the finned triple tube was more effective in enhancing the melting process of the non-Newtonian phase change material compared to the double tube. Increasing the radius of the middle tube and decreasing the length of the fins attached to it resulted in a slower melting process of the non-Newtonian fluid. Additionally, using a non-uniform magnetic field and increasing its intensity led to a 12-16% improvement in the melting performance of the triple-finned tube.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Yijie Zhuang, Hexin Li, Wenbin Xu, Si-Min Huang
Summary: This experimental study evaluates the melting performance of non-magnetic and magnetic nano-enhanced phase change materials (NEPCMs) in a non-uniform magnetic field. The results show that a 3 wt% Al2O3 NEPCM maximizes the enhancement of melting performance. The study also investigated the effects of filling height and porosity gradient on the heat transfer and energy storage characteristics.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Energy & Fuels
Ke Chen, Hayder Mohammed, Jasim M. Mahdi, Alireza Rahbari, Alasdair Cairns, Pouyan Talebizadehsardari
Summary: The study explores the impact of incorporating annular fins with nonuniform distribution on the thermal response of phase change material in a vertical triple-tube heat exchanger. By optimizing the distribution and sizes of the fins, significant uniformity of the melting rate and temperature field can be achieved. The results show improvements in melting time, charging rate, and overall reduction in melting and solidification times compared to cases with no fins.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Akhalesh Sharma, Rohit Kothari, Santosh Kumar Sahu
Summary: This study investigates the constrained melting behavior of phase change material in a spherical latent heat storage unit with a single fin, and finds that the location of the fin significantly affects the melting characteristics and heat transfer enhancement of PCM.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Wenbin Xu, Tianjiao Huang, Si-Min Huang, Yijie Zhuang
Summary: A numerical study is conducted to explore the regulation mechanism of magnetic field on the melting heat transfer and energy storage performance of nano-enhanced phase change material composited with metal foam. The results show that the addition of Fe3O4 nanoparticles can effectively promote melting and induce non-Newtonian effect of the molten material, while the influence of the magnetic field on the whole melting process depends on the Rayleigh number.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Rejane De Cesaro Oliveski, Fabio Becker, Luiz Alberto Oliveira Rocha, Cesare Biserni, Gabriel Eduardo Strohm Eberhardt
Summary: The study analyzed the melting process of lauric acid PCM in a finned rectangular cavity by conducting a parametric study of 78 different fin configurations. The results showed that an increase in fin length led to a reduction in the total time of the melting process.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Abdelghani Laouer, Muslum Arici, Mohamed Teggar, Said Bouabdallah, Cagatay Yildiz, Kamal A. R. Ismail, Seyed Soheil Mousavi Ajarostaghi, El Hacene Mezaache
Summary: This paper investigates the combined effect of a uniform magnetic field and nanoparticle volume fraction on the melting process of copper-water as Nano-enhanced Phase Change Material. The results show that the melting time is extended at high Ra as the Ha is increased, while the addition of nanoparticles contributes to a shorter melting time at low Ra but extends it at high Ra in the presence of a magnetic field. These findings may provide insights into controlling the melting process of electrically-conducting materials, specifically nano-enhanced energy storage materials.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Yubin Fan, Meng Yu, Chunwei Zhang, Long Jiang, Xuejun Zhang, Yang Zhao
Summary: A method to accelerate PCM melting based on convection intensification is proposed in this paper, which leads to significant reduction in total melting time and improvement in melting performance, as demonstrated by experiments.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Fei Liu, Guanmin Zhang
Summary: A new fin structure is proposed to improve the heat transfer characteristics of the triple-tube latent heat storage system. Numerical calculations and a melting/solidification model are used to analyze the effects of the new fins on the PCM process. The results show that the new fins significantly reduce the melting and solidification time, improving the overall heat storage and release rate.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Umit Nazli Temel, Ferhat Kilinc
Summary: This study proposes a new technique to determine liquid fractions of phase change material (PCM) during the melting process and investigates the effects of variable fin length arrangements on the melting performance experimentally. Detailed information about solid, mushy, and liquid ratios was obtained through analysing real thermal images. The use of variable-length fins shortens the melting time by 14.9% and reduces the average temperature of the latent heat thermal energy storage (LHTES) by around 10 degrees C compared to equal-length fin arrangement.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Se Hyun Kim, Seong Hyun Park, Sudhanshu Pandey, Man Yeong Ha
Summary: Numerical simulations were conducted to investigate the influence of horizontal fin arrangement on thermal performance of a PCM-filled heat sink. Six different fin positions were compared and analyzed. The enthalpy-porosity method was used to study phase change process and track the working fluid. Results showed that aligning fins at the center of the heat sink resulted in longer time to reach the lowest temperature and higher storage ratio. The presence of horizontal fins improved energy storage rate by 3.8%. Additionally, the energy storage ratio varied by 2.7% depending on fin arrangement, suggesting an effective way to store thermal energy input into the heat sink.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Wenxuan He, Yijie Zhuang, Yijun Chen, Changhong Wang
Summary: This study investigates the effects and mechanisms of magnetic field on phase change using a thermomagnetic convection model and the enthalpy-porosity method. The results show that positive magnetic field inhibits melting while negative magnetic field promotes it. This regulation is attributed to the different motions of nanoparticles in the liquid phase.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Bibhutibhusan Nayak, S. Narayana Jammalamadaka
Summary: This article presents a method for remote detection of bovine serum albumin (BSA) using modified cantilever beam magnetometry (CBM). By combining a magnetostrictive Fe70Ga30 cantilever with optical detection technique, researchers were able to detect high concentrations of BSA remotely. The results of this study demonstrate the potential of this method in estimating the magnetostriction of thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yu Hao, R. E. Camley, Z. Celinski
Summary: Magnetic particles have various applications and their magnetic state is determined by their size and the strength of an applied magnetic field. Numerical simulations were performed to study the effect of an applied field on the critical size of single-domain magnetic particles, and the critical field at which a particle becomes single-domain was determined.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Nitesh Singh, Naresh Kumar, Dharohar Sahadot, Anil Annadi, Vidyadhar Singh, Murtaza Bohra
Summary: The unique magnetic properties of FM/AFM and hard-FM/soft-FM nanocomposite thin films have significant relevance for numerous applications. The composition and performance of different magnetic phases in the nanocomposite films can be significantly affected by the laser ablation conditions and annealing temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alya Ali Musaed, Samir Salem Al-Bawri, Khaled Aljaloud, Wazie M. Abdulkawi, Mohammad Tariqul Islam, Mandeep Jit Singh, Zaini Sakawi, Husam Hamid Ibrahim
Summary: This research presents a wideband tunable metamaterial for body-centric applications in the millimeter-wave frequency band. The proposed metamaterial has a wide operating frequency range and enhanced gain, making it suitable for improving the antenna performance in 5G wireless communication systems.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Haonan Li, Cong Li, Hailiang Huang, Guodong Hao, Fei Wang
Summary: The electronic structure and ferroelectric-ferromagnetic coupling properties of Y-doped and vacancy-containing GaN-ZnO heterojunctions are systematically investigated. The magnetism in vacancy-containing systems is generated by the spin polarization of unpaired electrons induced by cationic vacancies, while in Y-doped systems, bound magnetic polarons are formed by the orbital hybridization of s-state and d-state electrons of Y-doped elements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Muhammad Ijaz, Hafeez Ullah, Bandar Ali Al-Asbahi, Mati Ullah Khan, Zaheer Abbas, Sana Ullah Asif
Summary: M-type BaFe11.4-xAlxCo0.6O19 hexaferrites with Al3+ substitutions were synthesized using the co-precipitation method followed by Sonochemical process. The synthesized materials were characterized using XRD, FTIR, UV-vis spectroscopy, VSM, SEM, and LCR meter. The results showed that aluminum doping decreased the band gap and enhanced the magnetic and dielectric properties of the hexaferrites, making them suitable for various applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg I. Utesov
Summary: The elementary excitations spectrum of anisotropic frustrated antiferromagnets in the fan phase is discussed. It is found that the low-energy part of the spectrum consists of a gapless phason branch with linear dispersion and a gapped optical branch corresponding to the fan structure amplitude oscillations. In the high-energy part of the spectrum, the excitations are similar to the magnons of the fully polarized phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alexander Ya. Simonovskii, Alexander A. Yanovskii, Arthur R. Zakinyan
Summary: In this study, the departure frequency of vapor bubbles during boiling of ferrofluid in a horizontal magnetic field is experimentally investigated. Two methods, visual and inductive, are used to measure the frequency of bubble departure. The results show that the bubble departure frequency can decrease with increasing magnetic field strength and increase with increasing temperature of the heat-emitting surface. A linear stability analysis is conducted to analyze the influence of the magnetic field on the frequency of bubble formation during ferrofluid boiling.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg Heczko, Michal Rames, Vit Kopecky, Petr Vertat, Michal Varga, Ladislav Straka
Summary: Heusler Ni-Mn-Ga alloys are multiferroic materials that exhibit magnetic shape memory (MSM) phenomena. By doping transition elements into Ni2MnGa alloys, the transformation temperatures can be modified and complex behaviors can be observed, such as the variation in saturation magnetization and the effects of elemental substitution on compound properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Carlos Ariel Samudio Perez, Ariel Flaig de Marchi
Summary: This study investigates the electronic and magnetic properties of the Full-Heusler Fe2MnAs alloy using first-principles calculations. The alloy may form spontaneously and exhibits a ferromagnetic order and high spin-polarization. It can be transformed into a half-metal by contracting the lattice constant. Additionally, certain defects contribute to the spin-polarization of the alloy, making it a fully half-metallic material.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Satish Geeri, Aditya Kolakoti, Prasadarao Bobbili
Summary: In this study, an electromagnetic wave-absorbing material was fabricated using a polymer composite material with fiber orientation and Multiwall Carbon Nanotubes as filler materials, along with a Perfect Electric Conducting material. The experiments demonstrated strong electromagnetic absorbing properties for the composites with PEC-coated and non-PEC-coated materials. Mechanical, thermal, and morphological analysis confirmed the similar trend in properties. CRITIC analysis helped identify the sequence order of sustaining properties for the fabricated composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yankai Chen, Ruoxue Zhang, Yukai An
Summary: The piezoelectricity, valley character, and magnetic properties of 2H-VS2 monolayer were studied, revealing its potential applications in spintronics and valleytronics due to its bipolar magnetic semiconductor characteristics and superior physical properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Leonardo S. Lima
Summary: This study investigates the thermodynamic quantities, such as entropy, specific heat, and magnetic susceptibility, in the next-nearest-neighbors Heisenberg model on a honeycomb-kagome lattice. The linear spin-wave approach is applied to obtain the temperature-dependent behavior of these quantities. Additionally, the entanglement negativity, a quantifier of quantum entanglement, and the spin Hall conductivity are also studied. The results show that all the thermodynamic quantities, as well as the entanglement negativity and spin Hall conductivity, exhibit an increasing trend with temperature. Furthermore, it is found that all the analyzed quantities approach zero in the low-temperature limit, consistent with experimental observations.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxing Wang, Maximilian Kai Reimann, Wang Chen, Yikun Zhang, Rainer Poettgen
Summary: The Mo2FeB2-type compounds RE2Ga2Mg (RE = Tm, Er, Ho) exhibit a large magnetocaloric effect, making them promising for cryogenic magnetic cooling applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)