Statistical analysis of scarred electromagnetic field for microwave cavity

2014 ◽  
Author(s):  
Xin-Wu Zhuang ◽  
Zhi-Yong Yu ◽  
Guang-Bin Liu ◽  
Xiang-Ru Teng
Keyword(s):  
Electromagnetic Field ◽  
Statistical Analysis ◽  
Microwave Cavity

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.

Statistical analysis of personal radiofrequency electromagnetic field measurements with nondetects

2008 ◽  
Vol 29 (6) ◽  
pp. 471-478 ◽  
Author(s):  
Martin Röösli ◽  
Patrizia Frei ◽  
Evelyn Mohler ◽  
Charlotte Braun-Fahrländer ◽  
Alfred Bürgi ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Statistical Analysis ◽  
Field Measurements ◽  
Radiofrequency Electromagnetic Field

Mathematical Modelling of Microwave Pyrolysis

2013 ◽  
Vol 11 (1) ◽  
pp. 543-559
Author(s):  
Elham Khaghanikavkani ◽  
Mohammed M. Farid
Keyword(s):  
Silicon Carbide ◽  
Electromagnetic Field ◽  
Kinetic Equations ◽  
Single Mode ◽  
Single Step ◽  
Phase Changes ◽  
Microwave Cavity ◽  
Heating Process ◽  
Order Kinetic ◽  
Microwave Pyrolysis

Abstract This study deals with a detailed numerical investigation of the microwave heating process in plastic pyrolysis. The pyrolysis of high-density polyethylene (HDPE) was studied using a single-mode microwave cavity, TE10 mode, at 2.45 GHz with two different absorbents, as carbon and silicon carbide, and the results were compared. The temperature distribution inside the sample was determined by solving the conservation equations coupled with the microwave and chemical kinetic equations. Lambert’s law was applied to describe the electromagnetic field in the microwave cavity. The effective heat capacity method was used to account for the latent heat in the melting range of plastic. The heat of the reaction was taken into account using first-order kinetic equations assuming a single-step reaction. One-dimensional model equations were solved using the finite difference method utilising MATLAB codes. The model developed in this study provides a better understanding of the fundamental mechanisms of the microwave pyrolysis of HDPE based on a combination of electromagnetic field and thermal models. The primary focus was to incorporate and investigate the effect of the phase changes and reaction during microwave pyrolysis. The results show that the temperature profile strongly depends on the physical properties of the material. Silicon carbide provides more uniform heating distribution compared with carbon.

scholarly journals Entanglement of two dipole-coupled qubits induced by a thermal field of one-mode lossless cavity with Kerr medium

2021 ◽  
Vol 2086 (1) ◽  
pp. 012216
Author(s):  
R K Zakharov ◽  
E K Bashkirov
Keyword(s):  
Exact Solution ◽  
Electromagnetic Field ◽  
Thermal Field ◽  
Kerr Nonlinearity ◽  
Microwave Cavity ◽  
Kerr Medium ◽  
Coupled Qubits

Abstract We studied the dynamics of two qubits interacting with one-mode thermal quantum electromagnetic field of microwave cavity with Kerr medium. Using the exact solution for considered model we derived the qubit-qubit negativity for separa coherent initial qubits states. We showed that initial qubits coherencee interaction can greatly enhance the degree of qubits entanglement in the presence of the Kerr nonlinearity and dipole-dipole interactionyeven for high thermal field intensities.

Electromagnetic Field Modeling of a Loaded Microwave Cavity

1992 ◽  
Vol 269 ◽  
Author(s):  
P. Chaussecourte ◽  
J.F. Lamaudiere ◽  
B. Maestrali
Keyword(s):  
Finite Element Method ◽  
Electromagnetic Field ◽  
Industrial Applications ◽  
Microwave Cavity ◽  
External Excitation ◽  
Edge Elements ◽  
Field Modeling ◽  
Empty Cavity ◽  
Original Approach ◽  
Good Agreement

ABSTRACTThe unavoidable way of a better conception of cavities for industrial applications is electromagnetic field numerical computation with the aim of placing the fields E and H into the material, and furthermore to obtain some characteristics like the input impedance of the cavity or the dissipated power in the sample. From Maxwell's equations and using a Finite Element Method with 3D edge elements we get a linear system from which, after resolution, we can obtain several kinds of results: research of eigen modes of an empty or partially dielectric loaded cavity, that is, for a bounded domain, all the frequencies that could be excited, using only dimensionnal (L,l,h) and physical (εʹ,εʺ) characteristics, or response of a loaded cavity to an external excitation, that is, setting a TE10 mode in a waveguide feeding a cavity, obtain the distribution of field inside the oven and the dielectric. An original approach allows us, by projection of the excitation on eigen modes, to understand the behavior of the cavity and the interaction wave-product. Our computation is in very good agreement with analytical results we can obtain in some specific configurations (eigenvalues of an empty cavity, or transmission of only the TE10 mode in a correctly shaped waveguide).

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