Thermal analysis of high frequency electromagnetic heating of lossy porous media

Sadeghi, Asghar; Hassanzadeh, Hassan; Harding, Thomas G.

doi:10.1016/j.ces.2017.06.013

Cited by 31 publications

(4 citation statements)

References 20 publications

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“…The impact of magnetic fields on fluid flow and the challenges associated with generating millimeter-wave-to-terahertz and high-power microwaves have been extensively discussed. Additionally, the application of high-frequency electromagnetic fields in plasma processing, materials processing, and the electrical properties of foods has been investigated [26][27][28][29][30][31][32].…”

Section: Effect Of High-frequency Traveling-wave Magnetic Field Direc...mentioning

confidence: 99%

Impact of High-Frequency Traveling-Wave Magnetic Fields on Low-Conductivity Liquids: Investigation and Potential Applications in the Chemical Industry

Cui,

Na,

Wang

et al. 2024

Materials

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High-frequency traveling-wave magnetic fields refer to alternating magnetic fields that propagate through space in a wave-like manner at high frequencies. These magnetic fields are characterized by their ability to generate driving forces and induce currents in conductive materials, such as liquids or metals. This article investigates the application and approaches of a unique form of high-frequency traveling-wave magnetic fields to low-conductivity liquids with conductivity ranging from 1 to 102 S/m. Experiments were conducted using four representative electrolytic solutions commonly employed in the chemical industry: sulfuric acid (H2SO4), sodium hydroxide (NaOH), sodium chloride (NaCl), and ionic liquid ([Bmim]BF4). The investigation focuses on the impact of high-frequency magnetic fields on these solutions at the optimal operating point of the system, considering the effects of Joule heating. The findings reveal that the high-frequency traveling magnetic field exerts a significant volumetric force on all four low-conductivity liquids. This technology, characterized by its non-contact and pollution-free nature, high efficiency, large driving volume, and rapid driving speeds (up to several centimeters per second), also provides uniform velocity distribution and notable thermal effects. It holds considerable promise for applications in the chemical industry, metallurgy, and other sectors where enhanced three-phase transfer processes are essential.

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Section: Effect Of High-frequency Traveling-wave Magnetic Field Direc...mentioning

confidence: 99%

Impact of High-Frequency Traveling-Wave Magnetic Fields on Low-Conductivity Liquids: Investigation and Potential Applications in the Chemical Industry

Cui,

Na,

Wang

et al. 2024

Materials

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“…Electromagnetic waves can radiate energy which have been used in many fields for heating, information transmission, etc. [69][70][71]. In the fabrication of perovskite, the main electromagnetic waves that have been used in the perovskite annealing process are infrared light waves, visible light, lasers and microwaves [52,72,73].…”

Section: Electromagnetic Wave Annealingmentioning

confidence: 99%

Annealing Engineering in the Growth of Perovskite Grains

Wang

Liu

et al. 2022

Crystals

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Perovskite solar cells (PSCs) are a promising and fast-growing type of photovoltaic cell due to their low cost and high conversion efficiency. The high efficiency of PSCs is closely related to the quality of the photosensitive layer, and the high-quality light absorbing layer depends on the growth condition of the crystals. In the formation of high-quality crystals, annealing is an indispensable and crucial part, which serves to evaporate the solvent and drive the crystallization of the film. Various annealing methods have different effects on the promotion of the film growth process owing to the way they work. Here, this review will present a discussion of the growth puzzles and quality of perovskite crystals under different driving forces, and then explain the relationship between the annealing driving force and crystal growth. We divided the main current annealing methods into physical and chemical annealing, which has never been summarized before. The main annealing methods currently reported for crystal growth are summarized to visualize the impact of annealing design strategies on photovoltaic performance, while the growth mechanisms of thin films under multiple annealing methods are also discussed. Finally, we suggest future perspectives and trends in the industrial fabrication of PSCs in the future. The review promises industrial manufacturing of annealed PSCs. The review is expected to facilitate the industrial fabrication of PSCs.

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“…During experiments of microwave heating, chemical reaction process cannot be observed because of the non-transparent equipment, therefore numerical simulation has become an essential tool to predict and visualize the temperature field [13][14][15][16]. S. Yu et al [17] investigated the pyrolysis process of methyl ricinoleate using microwave-assisted heating.…”

Section: Of 11mentioning

confidence: 99%

Preparation of Cerium Oxide via Microwave Heating: Research on Effect of Temperature Field on Particles

Yin

Liu

et al. 2022

Crystals

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Micro–nano cerium oxide particles with regular morphology and good dispersity have been widely used in polishing and other industrial fields. Microwave heating is an effective, controllable and green heating technology. The Venturi reactor used for microwave heating developed by our team was the core equipment utilized to study the effects of pyrolysis conditions on the purity and microstructure of cerium oxide particles. The experiments were carried out and the products were characterized using XRD, SEM and EDS. Microwave heating, fluid flow and chemical reaction were coupled using numerical simulation, the effects of microwave power, reactor location and waveguide arrangement on temperature fields were investigated. The results showed that with the microwave power increasing, the degree of crystallinity and purity of cerium oxide improved. The morphology gradually became sphere-like. Varied reactor locations and waveguide arrangements changed the gradient and dispersity of temperature fields. Bulk particles and agglomeration could be avoided, and cerium oxide particles with average size of 80 nm were produced when the reactor was located in the center of the cavity. Vertical arrangement of waveguides had the advantages of higher temperature value, gentle gradient and better dispersity.

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Thermal analysis of high frequency electromagnetic heating of lossy porous media

Cited by 31 publications

References 20 publications

Impact of High-Frequency Traveling-Wave Magnetic Fields on Low-Conductivity Liquids: Investigation and Potential Applications in the Chemical Industry

Impact of High-Frequency Traveling-Wave Magnetic Fields on Low-Conductivity Liquids: Investigation and Potential Applications in the Chemical Industry

Annealing Engineering in the Growth of Perovskite Grains

Preparation of Cerium Oxide via Microwave Heating: Research on Effect of Temperature Field on Particles

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