International Journal of Computational Materials Science and Engineering最新文献_第9页

Numerical simulation of thermal behavior in a naturally ventilated greenhouse 自然通风温室热行为的数值模拟

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-12-22 DOI: 10.1142/s2047684121500342

Yassine Slatni, M. Djezzar, Tarek Messai, Mahfoud Brahim

{"title":"Numerical simulation of thermal behavior in a naturally ventilated greenhouse","authors":"Yassine Slatni, M. Djezzar, Tarek Messai, Mahfoud Brahim","doi":"10.1142/s2047684121500342","DOIUrl":"https://doi.org/10.1142/s2047684121500342","url":null,"abstract":"Inside a greenhouse, during the day, the temperature rises very quickly, while the plants have to face temperatures that rise to more than 35[Formula: see text]C. The plant closes its pores to limit sweating and stops growing. As soon as it gets hot, it is therefore necessary to ventilate the greenhouse. In this context, this research aims to investigate the behavior of the natural ventilation on the internal climate of the tunnel greenhouse, which contains two openings in the roof. The effect of the position of the openings on heat transfer is considered, thus promoting photosynthesis and plant growth. The vorticity transport equation, the Poisson equation and the energy equation are discretized by using the finite volume method. Two-dimensional simulations that described laminar flows in a steady state were carried out. Flows are studied for a range of parameters: the Rayleigh number, Ra, [Formula: see text], and three positions of opening ventilation. The results reveal that the ventilation through the top opening position allows the best creation of heat exchanges between the air inside the greenhouse and its atmosphere, which serves to conserve the plant under a favorable climate that allows its growth.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44541620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

First-Principles Study on Controlling Transport Gap of Graphene Nanoribbons using Hybrid Armchair-Zigzag Nanostructures 混合扶手椅-锯齿形纳米结构控制石墨烯纳米带传输间隙的第一性原理研究

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-11-22 DOI: 10.1142/s2047684121500354

Nguyen Tien Cuong

引用次数: 1

An analytical approach to evaluate effective coefficients of 1–3 piezoelectric composites 一种评估1-3压电复合材料有效系数的分析方法

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-11-11 DOI: 10.1142/s2047684121500263

Sanjeeva Kumar Singh, S. K. Panda

{"title":"An analytical approach to evaluate effective coefficients of 1–3 piezoelectric composites","authors":"Sanjeeva Kumar Singh, S. K. Panda","doi":"10.1142/s2047684121500263","DOIUrl":"https://doi.org/10.1142/s2047684121500263","url":null,"abstract":"In this paper, a micromechanics method is developed to evaluate effective coefficients of piezoelectric fiber-reinforced composites. An exact solution is derived for effective elastic, piezoelectric and dielectric coefficients of such piezocomposites subjected to the applied load in the direction transverse to the fiber orientation. Simultaneously, based on finite element method, a numerical study is performed on a representative volume element of such piezo composite containing fiber in square packing arrangement. The finite element method provides a numerical solution to evaluate effective elastic, piezoelectric and dielectric coefficients for discrete volume fraction of fiber, the range being 0.1–0.6 for this study. The results are interpolated to understand the overall behavior of such piezocomposites. The results obtained from the micromechanics method and the finite element method are compared with the results obtained from other models based on strength of materials method given in the literature. It is observed that the method developed in this study provides better results for effective coefficients susceptible to fiber packing arrangements.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41451472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electronic properties of SmxSr1−xMnO3 for solid oxide fuel cell application — a first-principles study 固体氧化物燃料电池用SmxSr1−xMnO3的电子性质——第一性原理研究

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-11-03 DOI: 10.1142/s2047684121500251

S. Vijayalakshmi, S. Mahalakshmi, M. Muthujothi

引用次数: 0

Modeling of Phase Transition in Fabrication of Polymer-Derived Ceramics (PDCS) 聚合物衍生陶瓷(PDCS)制备过程中的相变建模

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-10-30 DOI: 10.1142/s2047684121500329

Chi Ma, Yan Li

引用次数: 1

Limit Analysis Solutions for Stability Factor of Unsupported Conical Slopes in Clays with Heterogeneity and Anisotropy 非均质和各向异性粘土中无支承圆锥边坡稳定系数的极限分析解

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-10-18 DOI: 10.1142/s2047684121500305

Van Qui Lai, Dang-Khoa. Nguyen, Rungkhun Banyong, S. Keawsawasvong

引用次数: 14

A Novel Finite Element Algorithm for Predicting the Elastic Properties of Wood Fibres 一种预测木纤维弹性性能的有限元算法

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-10-18 DOI: 10.1142/s2047684121500275

C. Nuttibase, P. Kunthong

引用次数: 0

Estimation of Induced Residual Stresses and Corrosion Behavior of Machined 718 Superalloy : 3D-FE Simulation and Optimization 718高温合金机加工残余应力和腐蚀行为的3D-FE模拟与优化

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-10-18 DOI: 10.1142/s2047684121500287

Khalaf Nasralla, S. Shihab, A. K. Mahmoud, Jabbar Gattmah

引用次数: 1

Grain Boundary Plane Rotation Analysis for FCC Bicrystal Structures Using MD Simulation 用MD模拟分析FCC双晶结构的晶界面旋转

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-10-18 DOI: 10.1142/s2047684121500299

Ryoichi Chiba, P. Kansuwan

引用次数: 0

Improving on current using new double-material heterojunction gate all around TFET (DMHJGAA TFET): Modeling and simulation 利用新型双材料异质结栅极改善TFET (DMHJGAA TFET)的电流:建模与仿真

IF 1.3

International Journal of Computational Materials Science and Engineering Pub Date : 2021-09-29 DOI: 10.1142/s2047684121500214

P. Vimala, N. Shree, U. Priyadarshini, T. Samuel

{"title":"Improving on current using new double-material heterojunction gate all around TFET (DMHJGAA TFET): Modeling and simulation","authors":"P. Vimala, N. Shree, U. Priyadarshini, T. Samuel","doi":"10.1142/s2047684121500214","DOIUrl":"https://doi.org/10.1142/s2047684121500214","url":null,"abstract":"Transistor, which is the building block of all electronic devices, has continuously scaled down its dimensions for better efficiency since the advent of CMOS circuits. Due to the thermal limit on the switching and various short-channel effects (SCEs), highly scaled MOSFETs are rendered unusable for low-power applications. Hence, the Tunnel Field-Effect Transistors (TFETs) are studied extensively for ultra-low-power applications. Further, multigate TFETs have emerged as the prime candidates for achieving better gate controllability. Throughout this work, a newly revised analytical model for Heterojunction Gate All Around (HJGAA) TFET is demonstrated using a 2D parabolic approximation equation. Analytical expressions are derived for both potential distribution and field distribution using appropriate boundary conditions. This distribution of electric fields is further used to measure the rate of tunneling output, and then we have extracted the drain current numerically. The findings indicate a substantial change in the drain current characteristics while reducing the SCE impacts to a considerable amount. Feasibility of the newly updated model is verified by comparing the results of the analytical model with the results of TCAD simulator.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43853864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1