Journal of Microwave Power and Electromagnetic Energy最新文献_第5页

Calculation of microwave heating temperature distribution based on SVD truncation 基于奇异值分解截断的微波加热温度分布计算

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-11-04 DOI: 10.1080/08327823.2022.2137748

Biao Yang, Hongbin Huang, Hongtao Ma, Lie-xing Zhou, Q. Du

{"title":"Calculation of microwave heating temperature distribution based on SVD truncation","authors":"Biao Yang, Hongbin Huang, Hongtao Ma, Lie-xing Zhou, Q. Du","doi":"10.1080/08327823.2022.2137748","DOIUrl":"https://doi.org/10.1080/08327823.2022.2137748","url":null,"abstract":"Abstract In mathematical models of microwave heating with infinite-dimensional characteristics, it is difficult to use traditional numerical methods to improve computational efficiency. In this work, we propose a fast and accurate method to calculate the temperature distribution of materials under microwave heating. First, we analysed the relationship between the choice of model order and the solution accuracy by downscaling the infinite-dimensional heat conduction partial differential equation (PDE) model into a finite-dimensional ordinary differential equation (ODE) model. Additionally, the effect of different boundary conditions on the global temperature distribution was analysed. Second, the equilibrium conversion matrix was calculated using the singular value decomposition (SVD) truncation method under homogeneous boundary conditions. Using this matrix, a lower-dimensional microwave heating ODE model was further obtained. Finally, the numerical simulation results showed that the root mean square error (RMSE) was only 0.07 and the maximum relative error was only −0.85%. The computation time of the equilibrium conversion matrix was 2.12 ∼ 3.00 ms, and the model calculation time was reduced by 97.78%. We compared the calculated temperature rise curves with those obtained using the conventional COMSOL model. The SVD truncation method achieved an efficient and accurate solution for the microwave heating model.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":"6 8","pages":"238 - 258"},"PeriodicalIF":1.5,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72447450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Drops deformation influence on the microwaves interaction with a magnetodielectric emulsion 降低变形对磁介电乳液微波相互作用的影响

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-10-31 DOI: 10.1080/08327823.2022.2141043

S. Turkin, Yuri Dikansky, A. Zakinyan

引用次数: 0

Editor’s message: pondering hard and soft data in research and knowledge generation 编者按:在研究和知识生成中思考硬数据和软数据

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-10-02 DOI: 10.1080/08327823.2022.2140748

J. Aguilar-Garib

引用次数: 0

Evaluation of graphite and TiO2 as susceptors for microwave dewaxing in ceramic shell casting processes of artworks 石墨和TiO2作为微波脱蜡感受器在艺术品陶瓷壳体铸造工艺中的评价

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-08-10 DOI: 10.1080/08327823.2022.2106730

I. Pérez-Conesa, J. Fayos-Fernández, J. A. Aguilar Galea, J. Monzó-Cabrera, R. Pérez-Campos

{"title":"Evaluation of graphite and TiO2 as susceptors for microwave dewaxing in ceramic shell casting processes of artworks","authors":"I. Pérez-Conesa, J. Fayos-Fernández, J. A. Aguilar Galea, J. Monzó-Cabrera, R. Pérez-Campos","doi":"10.1080/08327823.2022.2106730","DOIUrl":"https://doi.org/10.1080/08327823.2022.2106730","url":null,"abstract":"Abstract The main problems of the traditional foundry dewaxing processes in fine arts workshops are the emission of gases, the loss of 80% of the wax, the high electrical consumption, and the high risks for the operators. The introduction of the microwave technology for dewaxing of ceramic shell molds allows to minimize some of these problems, although the use of electromagnetic susceptors that capture the radiated energy and transform it into heat is required. This article describes different microwave dewaxing tests using TiO2 and graphite as susceptors. The results obtained show that this technique is viable, allowing the casting process to be carried out with a low percentage of breakage problems in the mold and significantly reducing the emitted gases and electricity consumption. The technique allows to recover in the same operation around 90% of the wax used in small and medium format objects. The tests show that the selection of the material used as a susceptor, the area of application and the power regimes, are fundamental to enable a controlled, soft and non-aggressive dewaxing, both for the art molds and for the environment, as opposed to the traditional Flash Dewaxing technique. In this way, it is possible to change the foundry of ceramic shells for artworks to achieve high levels of performance and safety, and to save energy, time and materials.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":"77 1","pages":"201 - 215"},"PeriodicalIF":1.5,"publicationDate":"2022-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83922923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dielectric properties of eggshell powder at 2.45 and 5.8 GHz relevant to dielectric heating 蛋壳粉在2.45 GHz和5.8 GHz下的介电特性与介电加热的关系

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-08-08 DOI: 10.1080/08327823.2022.2107869

Prem Pankaj, Prabhdeep Kaur, K. S. Mann

引用次数: 0

Feasibility study of patch antenna for monitoring moisture content of made tea 贴片天线监测泡茶水分的可行性研究

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-08-05 DOI: 10.1080/08327823.2022.2107572

V. D. Shivling, Amandeep Singh, Baban K. S. Bansod, Urvashi Nag, D. Meena

引用次数: 1

Dielectric behavior of soil as a function of frequency, temperature, moisture content and soil texture: a deep neural networks based regression model 频率、温度、含水量和土壤质地对土壤介电特性的影响:基于深度神经网络的回归模型

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-07-22 DOI: 10.1080/08327823.2022.2103630

Prachi Palta, Prabhdeep Kaur, K. S. Mann

{"title":"Dielectric behavior of soil as a function of frequency, temperature, moisture content and soil texture: a deep neural networks based regression model","authors":"Prachi Palta, Prabhdeep Kaur, K. S. Mann","doi":"10.1080/08327823.2022.2103630","DOIUrl":"https://doi.org/10.1080/08327823.2022.2103630","url":null,"abstract":"Abstract Dielectric behavior of soil has utmost applications in microwave remote sensing and soil treatment. In the present study, the soil's dielectric properties (Ɛ' and Ɛ\") were measured using the vector network analyzer and an open-ended coaxial probe (85070E, Agilent Technologies) in the region of 0.2 to 14 GHz. The observed results showed that Ɛ' and Ɛ\" strongly depend on frequency, texture, moisture content and temperature. A deep neural network (DNN) based multivariable regression model has been developed to model their behavior, using experimentally observed data to learn its parameters automatically. It shows a five-fold cross-validation root mean square errors (RMSE) of 0.0258 and 0.0336, and R2-scores of 1.0000 and 0.9998, between actual recorded and predicted values of Ɛ' and Ɛ\", respectively. The results of the proposed DNN-based model have been compared with the response surface method (RSM) based model; among these, the DNN-based model shows significantly better results. Further, the DNN-based estimates of Ɛ' and Ɛ\" for loam texture at a moisture content of 18% (i.e. in between observed experiments of 15% and 20%) are made and plotted with actual observed values at 15% and 20% to verify the predictive ability of the proposed DNN-based model. It shows an acceptable estimate of dielectric properties and the effectiveness of the fast and innovative DNN-based approach for predicting soil's dielectric properties depending upon multiple factors.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":"25 1","pages":"145 - 167"},"PeriodicalIF":1.5,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75022366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Self-sensing reinforced concrete for damage assessment and real time strength development in smart structures 用于智能结构损伤评估和实时强度开发的自感知钢筋混凝土

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-07-22 DOI: 10.1080/08327823.2022.2103628

M. Ozturk

引用次数: 0

Editor's message: highlighting the importance of transcendent conferences 编者寄语:强调卓越会议的重要性

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-07-03 DOI: 10.1080/08327823.2022.2106070

J. Aguilar-Garib

引用次数: 0

Modeling the effect of immersion fluids on the radiofrequency heating performance of cornflour 浸泡流体对玉米粉射频加热性能影响的建模

IF 1.5 4区工程技术

Journal of Microwave Power and Electromagnetic Energy Pub Date : 2022-04-03 DOI: 10.1080/08327823.2022.2066771

Qianyi Chen, Damla Dag, F. Kong, Ran Yang, Jiajia Chen

{"title":"Modeling the effect of immersion fluids on the radiofrequency heating performance of cornflour","authors":"Qianyi Chen, Damla Dag, F. Kong, Ran Yang, Jiajia Chen","doi":"10.1080/08327823.2022.2066771","DOIUrl":"https://doi.org/10.1080/08327823.2022.2066771","url":null,"abstract":"Abstract Non-uniform heating is a significant challenge in radiofrequency (RF) heating of low moisture foods. Previous experiments showed that the immersion of fluids (air, deionized water, and soybean oil) changed the RF heating uniformity and rate of cornflour. However, the behind mechanism is not well understood. This study developed a finite-element-based model that incorporated quasi-static electromagnetics and Fourier’s heat transfer to understand the effect of the three immersion fluids on the RF heating performance of cornflour. The model was validated and showed good agreement with experimental thermal images. The simulation results showed that the immersion of soybean oil increased the average heating rate and improved the heating uniformity compared to immersions of air and deionized water. Less distortion of electric potential reduced the fringe effect of edge heating and thus improved the heating uniformity. The higher heating rate was attributed to more dissipated power within the cornflour sample and less surface heat loss from cornflour to the surrounding fluid than the immersion of air or water. The use of soybean oil as immersion fluid could be a promising strategy to be implemented with RF technology to improve heating performance of low moisture food products.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":"61 1","pages":"103 - 123"},"PeriodicalIF":1.5,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85639029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2