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International Journal of Computational Materials Science and Engineering最新文献

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Stability effect of an axial magnetic field on fluid flow bifurcation between coaxial cylinders 轴向磁场对同轴圆柱间流体分岔的稳定性影响
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-09-25 DOI: 10.1142/s2047684121500238
H. Benhacine, B. Mahfoud, M. Salmi
{"title":"Stability effect of an axial magnetic field on fluid flow bifurcation between coaxial cylinders","authors":"H. Benhacine, B. Mahfoud, M. Salmi","doi":"10.1142/s2047684121500238","DOIUrl":"https://doi.org/10.1142/s2047684121500238","url":null,"abstract":"Numerical simulations aim to investigate the bifurcation caused by swirling flow between two coaxial vertical cylinders, and the fluid layers produced by the thermal gradient. The stability of both bifurcation and fluid layers by an axial magnetic field is analyzed. The finite-volume method is used to solve the governing Navier–Stokes, temperature and potential equations. A conducting viscous fluid characterized by a small Prandtl number [Formula: see text] is placed in the gap between two coaxial cylinders. The combination of aspect ratio, [Formula: see text] and Reynolds number, [Formula: see text] for three annular gaps ([Formula: see text] and [Formula: see text]) is compared in terms of flow stability, and heat transfer rates. Without a magnetic field, the vortex breakdown takes place near the inner cylinder due to the increased pumping action of the Ekman boundary layer. Fluid layered structures are developed by the competition between buoyancy and viscous forces. The increase in the magnitude of the magnetic field retarders the onset of the oscillatory instability caused by the disappearance of the vortex breakdown and reduces the number of fluid layers. The limits in which a vortex breakdown bubble manifests and the limits of transition from the multiple fluid layers to the single fluid layer are established.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63848851","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
Stabilization of ferromagnetism in carbon doped Mgn−2Mn2On clusters 碳掺杂Mgn−2Mn2On簇的铁磁性稳定性
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-09-25 DOI: 10.1142/s2047684121500226
Rabin Acharya, Nirajan Pant, B. Rahaman, M. Yadav
{"title":"Stabilization of ferromagnetism in carbon doped Mgn−2Mn2On clusters","authors":"Rabin Acharya, Nirajan Pant, B. Rahaman, M. Yadav","doi":"10.1142/s2047684121500226","DOIUrl":"https://doi.org/10.1142/s2047684121500226","url":null,"abstract":"We present density functional theory-based first principles study of magnetic properties of Mn-doped Mg[Formula: see text]Mn2On clusters. Mn-doped MgnOn clusters are found to exhibit antiferromagnetic order. We show that ferromagnetic state can be stabilized by codoping with carbon at oxygen site. Our study suggests that the holes created due to C doping are responsible for the stabilization of ferromagnetism.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44066970","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
Evaluation of grain growth exponent by Monte Carlo simulation in polycrystalline materials 用蒙特卡罗模拟评价多晶材料的晶粒生长指数
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-09-23 DOI: 10.1142/s204768412150024x
P. Rajendra, K. Phaneesh, C. Ramesha, Madeva Nagaral, V. Auradi
{"title":"Evaluation of grain growth exponent by Monte Carlo simulation in polycrystalline materials","authors":"P. Rajendra, K. Phaneesh, C. Ramesha, Madeva Nagaral, V. Auradi","doi":"10.1142/s204768412150024x","DOIUrl":"https://doi.org/10.1142/s204768412150024x","url":null,"abstract":"In metallurgy, the microstructure study is very important to evaluate the properties and performances of a material. The Monte Carlo method is applied in so many fields of Engineering Science and it is a very effective method to examine the topology of the computer-simulated structures and exactly resembles the static behavior of the atoms. The effective 2D simulation was performed to understand the grain growth kinetics, under the influence of second phase particles (impurities) is a base to control the microstructure. The matrix size and [Formula: see text]-states are optimized. The grain growth exponent was investigated in a polycrystalline material using the [Formula: see text]-state Potts model under the Monte Carlo simulation. The effect of particles present within the belly of grains and pinning on the grain boundaries are observed. The mean grain size under second phase particles obeys the square root dependency.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42863781","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
Penetration and uplift resistances of two interfering pipelines buried in clays 粘土中两条干扰管道的抗渗透和抗扬性能
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-08-16 DOI: 10.1142/s2047684121500202
Sorawit Seehavong, S. Keawsawasvong
{"title":"Penetration and uplift resistances of two interfering pipelines buried in clays","authors":"Sorawit Seehavong, S. Keawsawasvong","doi":"10.1142/s2047684121500202","DOIUrl":"https://doi.org/10.1142/s2047684121500202","url":null,"abstract":"The primary aim of this paper is to determine penetration and uplift resistances of two interfering pipelines buried in clay with a linear increase in strength. The advanced finite element limit analysis of upper and lower bound theorems is used to perform new limit analysis solutions for both penetration and uplift resistances of two interfering pipelines. The strength profiles of cohesive soils are the cases of normally consolidated clays in deep water by setting the shear strength at the ground surface to be zero and linearly increased with the depth. The twin pipelines have the same geometries and are simultaneously failed at the same magnitude of the failure uplift or bearing loads. There are three considered input parameters including the spacing between the pipes, the embedded depth of the pipes, and the unit weight of soils. All input parameters have significant influences on the penetration and uplift resistances of two interfering pipelines. Failure mechanisms of the problems are also investigated, and stability charts of the penetration and uplift resistances of two interfering pipelines are produced for practical uses in offshore geotechnical engineering.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46663885","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: 3
A 13-point sampling point scheme for 20-node brick elements 20节点砖元素的13点采样点方案
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-08-11 DOI: 10.1142/s2047684121500196
Shyjo Johnson, S. Sivakumar, D. Nagarajan
{"title":"A 13-point sampling point scheme for 20-node brick elements","authors":"Shyjo Johnson, S. Sivakumar, D. Nagarajan","doi":"10.1142/s2047684121500196","DOIUrl":"https://doi.org/10.1142/s2047684121500196","url":null,"abstract":"A new sampling point scheme with 13 evaluation points was introduced in this research study for 20-node brick elements. The new sampling points were located inside the brick element at the edges and the center point of the 20-node brick element. This integration scheme can be assumed to be an imitation of the Gaussian integration scheme. Standard benchmark problems were chosen from the different research works and compared with our proposed scheme. Finally, the proposed integration scheme achieves good results for 20-node brick elements on different performance parameters of finite element analysis.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46215761","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
Temperature-dependent mixing behavior of Pb–Sb alloys in liquid state Pb–Sb合金在液态下的温度相关混合行为
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-08-04 DOI: 10.1142/s2047684121500184
I. Bhandari, N. Panthi, I. Koirala
{"title":"Temperature-dependent mixing behavior of Pb–Sb alloys in liquid state","authors":"I. Bhandari, N. Panthi, I. Koirala","doi":"10.1142/s2047684121500184","DOIUrl":"https://doi.org/10.1142/s2047684121500184","url":null,"abstract":"We have extended a computational model used to research the thermodynamic properties of binary liquid alloys to study chemical short-range order parameters and diffusion coefficients. Numerous simulations have also been employed for surface properties such as surface concentration and surface tension. The propensities for phase separation of the Pb–Sb alloy were also observed with a temperature rise. The structural and thermodynamic properties of the alloys were measured using the same interaction parameters that are suitable for the free energy of mixing and mixing enthalpy. The interaction parameters are discovered to be temperature-dependent but concentration-independent. Our results indicate that the liquid alloy Pb–Sb has a weakly interacting composition. According to the surface property review, the element Sb having a higher surface concentration than its bulk concentration segregates over the surface of the alloy.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45479401","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
The natural neighbor radial point interpolation method in the Elasto-Static analysis of Honeycomb-Shaped foams 蜂窝泡沫弹静力分析中的自然邻域径向点插值法
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-07-05 DOI: 10.1142/S2047684121500147
N. Nascimento, J. Belinha, R. Jorge, D. Rodrigues
{"title":"The natural neighbor radial point interpolation method in the Elasto-Static analysis of Honeycomb-Shaped foams","authors":"N. Nascimento, J. Belinha, R. Jorge, D. Rodrigues","doi":"10.1142/S2047684121500147","DOIUrl":"https://doi.org/10.1142/S2047684121500147","url":null,"abstract":"Cellular solid materials are progressively becoming more predominant in lightweight structural applications as more technologies realize these materials can be improved in terms of performance, quality control, repeatability and production costs, when allied with fast developing manufacturing technologies such as Additive Manufacturing. In parallel, the rapid advances in computational power and the use of new numerical methods, such as Meshless Methods, in addition to the Finite Element Method (FEM) are highly beneficial and allow for more accurate studies of a wide range of topologies associated with the architecture of cellular solid materials. Since these materials are commonly used as the cores of sandwich panels, in this work, two different topologies were designed — conventional honeycombs and re-entrant honeycombs — for 7 different values of relative density, and tested on the linear-elastic domain, in both in-plane directions, using the Natural Neighbor Radial Point Interpolation Method (NNRPIM), a newly developed meshless method, and the Finite Element Method (FEM) for comparison purposes.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48376148","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
Closed-form expressions for bending and buckling of functionally graded nanobeams by the Laplace transform 用拉普拉斯变换求解功能梯度纳米梁弯曲和屈曲的闭合表达式
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-06-21 DOI: 10.1142/s2047684121500123
I. Nazmul, Indronil Devnath
{"title":"Closed-form expressions for bending and buckling of functionally graded nanobeams by the Laplace transform","authors":"I. Nazmul, Indronil Devnath","doi":"10.1142/s2047684121500123","DOIUrl":"https://doi.org/10.1142/s2047684121500123","url":null,"abstract":"This paper presents analytical solutions for bending and buckling of nonlocal functionally graded (FG) Euler–Bernoulli (EB) nanobeams. Material gradation along the thickness direction could be defined by a power function (P-FG), a sigmoidal function (S-FG), and an exponential function (E-FG). Laplace transform is applied to the differential form of the equation of motion of the nonlocal elasticity theory. Closed-form expressions for bending deflection and critical buckling load of FG nanobeams are derived. Effects of material gradations as well as the nonlocal parameter are examined. It is found that bending displacements and critical buckling loads could be controlled by an appropriate choice of material distribution parameter for P-FG nanobeams. The presented results also demonstrate the influences of factors such as the choice of material gradation, power-law index, and nonlocal parameter on bending and buckling behavior.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43876929","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: 5
A method for determining parameters of hyperelastic materials and its application in simulation of pneumatic soft actuator 一种超弹性材料参数确定方法及其在气动软执行器仿真中的应用
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-06-14 DOI: 10.1142/S2047684121500172
H. Dang, C. T. Vo, V. Nguyen, Hai Nam Nguyen, Anh Vang Tran, V. B. Phung
{"title":"A method for determining parameters of hyperelastic materials and its application in simulation of pneumatic soft actuator","authors":"H. Dang, C. T. Vo, V. Nguyen, Hai Nam Nguyen, Anh Vang Tran, V. B. Phung","doi":"10.1142/S2047684121500172","DOIUrl":"https://doi.org/10.1142/S2047684121500172","url":null,"abstract":"This paper presents a method for determining material constants of hyperelastic material used for building the soft robotic actuators. Sixty testpieces were made of silicone rubber with a shore A hardness from 20 A to 45 A. Each of them was then subjected to the uniaxial tensile test to obtain the stress–strain relationship, which is a key factor to evaluate the compatibility of the common six forms of strain energy density function for hyperelastic material. The sum of square error was used to determine the most relevant constitutive models, which are Ogden third order, Polynomial second order, and Yeoh, as well as parameter values of the corresponding materials. To analyze the appropriateness of these models for computation, six pneumatic soft actuators were built from materials with different hardness and tested for various pressures. From the simulation and experimental results, the model Yeoh has yielded the highest accuracy. This outcome forms a firm basis for the determination of suitable material in the computation and simulation of the pneumatic soft actuator. Besides, the obtained experimental results in this paper could be included in the database of hyperelastic material with different hardness for further simulation in the related field.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46264264","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
Numerical study of forced imbibition phenomenon in fluid flow through a water-wet porous media 流体在水湿多孔介质中的强迫吸胀现象的数值研究
IF 1.3
International Journal of Computational Materials Science and Engineering Pub Date : 2021-06-14 DOI: 10.1142/S2047684121500160
J. Kesarwani, R. Meher
{"title":"Numerical study of forced imbibition phenomenon in fluid flow through a water-wet porous media","authors":"J. Kesarwani, R. Meher","doi":"10.1142/S2047684121500160","DOIUrl":"https://doi.org/10.1142/S2047684121500160","url":null,"abstract":"This paper presents a mathematical model to study forced imbibition and examine the correlation between spontaneous and forced imbibition in a water-wet heterogeneous porous media. An explicit approximate analytical method with its convergence analysis is proposed here to obtain an analytic expression for the saturation profile of the wetting phase along with its case study to discuss the potential effects and reliability of the viscosity ratio, wettability state of the medium, capillary pressure and relative permeability of the phases on forced imbibition phenomenon. Finally, the simulation results investigate the impact of all parameters on the hydrocarbon reservoir’s saturation rate and recovery rate during the forced imbibition process.","PeriodicalId":45186,"journal":{"name":"International Journal of Computational Materials Science and Engineering","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47742697","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
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