Simulation of the electromagnetic field and temperature distribution in magnetic nanoparticles hyperthermia

2016 ◽  
Author(s):  
Eugeniusz Kurgan
Keyword(s):  
Electromagnetic Field ◽  
Magnetic Nanoparticles ◽  
Temperature Distribution

scholarly journals Shape Effect on the Temperature Field during Microwave Heating Process

2018 ◽  
Vol 2018 ◽  
pp. 1-24 ◽  
Author(s):  
Zhijun Zhang ◽  
Tianyi Su ◽  
Shiwei Zhang
Keyword(s):  
Electromagnetic Field ◽  
Heat Conduction ◽  
Temperature Distribution ◽  
Microwave Cavity ◽  
Heating Process ◽  
Shape Effect ◽  
Power Absorption ◽  
Sample Shape ◽  
Distribution Uniformity ◽  
Microwave Process

Aiming at improving the food quality during microwave process, this article mainly focused on the numerical simulation of shape effect, which was evaluated by microwave power absorption capability and temperature distribution uniformity in a single sample heated in a domestic microwave oven. This article only took the electromagnetic field and heat conduction in solid into consideration. The Maxwell equations were used to calculate the distribution of microwave electromagnetic field distribution in the microwave cavity and samples; then the electromagnetic energy was coupled as the heat source in the heat conduction process in samples. Quantitatively, the power absorption capability and temperature distribution uniformity were, respectively, described by power absorption efficiency (PAE) and the statistical variation of coefficient (COV). In addition, we defined the comprehensive evaluation coefficient (CEC) to describe the usability of a specific sample. In accordance with volume or the wave numbers and penetration numbers in the radial and axial directions of samples, they can be classified into different groups. And according to the PAE, COV, and CEC value and the specific need of microwave process, an optimal sample shape and orientation could be decided.

scholarly journals Evaluation of Microwave Applicator Design on Electromagnetic Field Distribution and Heating Pattern of Cooked Peeled Shrimp

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1903
Author(s):  
Érica S. Siguemoto ◽  
Jorge A. W. Gut ◽  
Georgios Dimitrakis ◽  
Sebastien Curet ◽  
Lionel Boillereaux
Keyword(s):  
Electromagnetic Field ◽  
Temperature Distribution ◽  
Microwave Heating ◽  
Field Distribution ◽  
Heating Process ◽  
Manufacturing Companies ◽  
Electromagnetic Field Distribution ◽  
Shrimp Sample ◽  
Microwave Applicator ◽  
Heating Pattern

Non-uniform temperature distribution within solid food is a major problem associated with microwave heating, which limits industrial applications. Therefore, an experimentally validated 3D model was proposed to study the effect of microwave applicator geometry on the electromagnetic field distribution and heating pattern of shrimp under different processing conditions. Simulation results were compared with physical experiments, in which a cooked peeled shrimp sample was heated using two different laboratory-scale microwave applicators (rectangular and cylindrical cavities). For the rectangular applicator, the temperature distribution within the shrimp, when examined in cross-section, was more homogeneous compared to that of the cylindrical applicator. The results showed the influence of the complex shape of the food on the temperature distribution during microwave heating, as well as of process parameters (input power and geometry cavity). Moreover, this modelling method could provide a better understanding of the microwave heating process and assist manufacturing companies to evaluate a suitable microwave applicator according to their specific purpose.

scholarly journals Effective electrodynamical parameters and microwave heating of radially heterogeneous pellets containing EAF dust and biochar

2021 ◽  
Vol 2015 (1) ◽  
pp. 012007
Author(s):  
Anton P Anzulevich ◽  
Leonid N Butko ◽  
Dmitry A Pavlov ◽  
Dmitry A Kalganov ◽  
Valentin A Tolkachev ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Temperature Distribution ◽  
Volume Fraction ◽  
Effective Permittivity ◽  
Electric Arc ◽  
Arc Furnace ◽  
Eaf Dust ◽  
Permittivity And Permeability ◽  
Composite Mixture ◽  
Effective Medium Approach

Abstract In this work, we investigated the effect of microwave radiation with radially heterogeneous pellets consisting of electric arc furnace (EAF) dust and biochar. We reviewed the possible content of EAF dust in terms of permittivity and permeability of its components and calculated effective permittivity and permeability of EAF dust by an effective medium approach. Using obtained values we calculated dependencies of effective permittivity and permeability of EAF dust - biochar composite mixture on the volume fraction of EAF dust and conductivity of biochar. Taking into account these dependencies we simulated electromagnetic field and temperature distribution within pellet with a radial dependency of volume fraction of EAF dust and effective permittivity correspondingly.

scholarly journals The Effects of Absorbing Materials on the Homogeneity of Composite Heating by Microwave Radiation

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7362
Author(s):  
Betime Nuhiji ◽  
Matthew P. Bower ◽  
William A. E. Proud ◽  
Steven J. Burpo ◽  
Richard J. Day ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Temperature Distribution ◽  
Electromagnetic Radiation ◽  
Heat Distribution ◽  
Temperature Uniformity ◽  
Geometric Complexity ◽  
Uniform Temperature ◽  
Better Regulation ◽  
Absorbing Materials ◽  
Complexity Increase

When cured in a microwave, flat thin composite panels can experience even heat distribution throughout the laminate. However, as load and geometric complexity increase, the electromagnetic field and resulting heat distribution is altered, making it difficult to cure the composite homogeneously. Materials that absorb and/or reflect incident electromagnetic radiation have the potential to influence how the field behaves, and therefore to tailor and improve the uniformity of heat distribution. In this study, an absorber was applied to a composite with non-uniform geometry to increase heating in the location which had previously been the coldest position, transforming it into the hottest. Although this result overshot the desired outcome of temperature uniformity, it shows the potential of absorbing materials to radically change the temperature distribution, demonstrating that with better regulation of the absorbing effect, a uniform temperature distribution is possible even in non-uniform composite geometries.

Modeling of induction heating of thermoplastic composites

2020 ◽  
pp. 089270572091197
Author(s):  
Maximilian Holland ◽  
Michel JL van Tooren ◽  
Darun Barazanchy ◽  
Jaspreet Pandher
Keyword(s):  
Electromagnetic Field ◽  
Temperature Distribution ◽  
Heat Generation ◽  
Induction Heating ◽  
Composite Plates ◽  
Current Density Distribution ◽  
Element Model ◽  
Layered Composite ◽  
Thermoplastic Composites ◽  
Current Densities

In this article, a hybrid finite element model is presented for the simulation of induction heating of layered composite plates. Modeling includes the alternating electromagnetic field generated by an alternating current running through a coil, the current densities in the composite plate resulting from the electromagnetic field, the heat generation resulting from the current density distribution, and the heat transfer resulting from the nonuniform heat generation in the plate and the temperature distribution in the plate. The different elements of the model are shown to capture the time-dependent temperature distribution resulting from a coil moving over the surface of a composite laminate.

scholarly journals Thermal Balance of the Magneto-Hydro-Dynamic Pump for Recovery of Platinum Group Metals from Spent Auto Catalysts

2016 ◽  
Vol 61 (1) ◽  
pp. 253-256 ◽  
Author(s):  
S. Gil ◽  
W. Bialik ◽  
M. Saternus ◽  
A. Fornalczyk
Keyword(s):  
Electromagnetic Field ◽  
Temperature Distribution ◽  
Chemical Compounds ◽  
Platinum Group Metals ◽  
Energetic Efficiency ◽  
Modified Method ◽  
Valuable Metals ◽  
Catalytic Role ◽  
Platinum Group ◽  
Dynamic Pump

Every new car should be equipped with the catalyst, which limits the amount of harmful chemical compounds such as NOx, CH and CO emitted to the air. Auto catalyst consists of the ceramic or metallic carrier, on which is the layer with Platinum Group Metals playing catalytic role. There are many methods using for recovery those valuable metals from spent auto catalyst, however evry of those methods have some limitations. Proces described in the article is the modified method of metal collector, which used magnetohydrodynamic pump. Rotary electromagnetic field generates in the liquid metal rotary current, which as a consequence washing out the PGM metals from the ceramic carriers. Considering the possibilities of commercialization of the described method, the energy balance was made. From that balance the energetic efficiency of the unit was determined and the analysis of the temperature distribution was shown thermographycally.

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