Journal of Engineering Mathematics最新文献_第7页

Approximate boundary conditions for a Mindlin–Timoshenko plate surrounded by a thin layer 被薄层包围的明德林-季莫申科板的近似边界条件

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-28 DOI: 10.1007/s10665-023-10328-w

Farida Madjour, Leila Rahmani

引用次数: 0

An immersed boundary method for mass transport applications in multiphase systems with discontinuous species concentration fields 沉浸边界法在物种浓度场不连续的多相系统中的质量输运应用

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-20 DOI: 10.1007/s10665-024-10332-8

Melina Orova, Stergios G. Yiantsios

{"title":"An immersed boundary method for mass transport applications in multiphase systems with discontinuous species concentration fields","authors":"Melina Orova, Stergios G. Yiantsios","doi":"10.1007/s10665-024-10332-8","DOIUrl":"https://doi.org/10.1007/s10665-024-10332-8","url":null,"abstract":"We present a numerical approach to address mass transport problems in multiphase systems, where a diffusing species concentration may exhibit discontinuities across phase boundaries. The approach employs a fixed structured grid, non-conforming with the probably complex or even evolving phase interfaces, in the same spirit as in numerous works in the literature focused on the dynamics of multiphase flows containing solid particles, immiscible fluids, elastic embedded structures, etc. The distinctive feature of the proposition is that in the transport equation, solved over the entire domain, the discontinuities are captured by including a distribution of source-dipoles along the phase boundaries. Moreover, the magnitude of the discontinuities and the source-dipole field strength do not need to be predetermined but are found as parts of the solution by a compatibility condition on the composite concentration field. A numerical implementation based on the finite element method is presented and examples are discussed demonstrating the validity of the approach. In addition, several types of multiphase mass transport problems are discussed, and simple examples are also presented, where it could find application.","PeriodicalId":50204,"journal":{"name":"Journal of Engineering Mathematics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139921973","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

Analytical treatments of time-fractional seventh-order nonlinear equations via Elzaki transform 通过埃尔扎基变换对时间分数七阶非线性方程进行分析处理

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-17 DOI: 10.1007/s10665-023-10326-y

Liaqat Ali, Guang Zou, Na Li, Kashif Mehmood, Pan Fang, Adnan Khan

{"title":"Analytical treatments of time-fractional seventh-order nonlinear equations via Elzaki transform","authors":"Liaqat Ali, Guang Zou, Na Li, Kashif Mehmood, Pan Fang, Adnan Khan","doi":"10.1007/s10665-023-10326-y","DOIUrl":"https://doi.org/10.1007/s10665-023-10326-y","url":null,"abstract":"In this article, we’ll show how to solve the time-fractional seventh-order Lax’s Korteweg–de Vries and Kaup–Kupershmidt equations analytically using the homotopy perturbation approach, the Adomian decomposition method, and the Elzaki transformation. The KdV equation is a general integrable equation with an inverse scattering transform-based solution that arises in a variety of physical applications, including surface water waves, internal waves in a density stratified fluid, plasma waves, Rossby waves, and magma flow. Fractional derivative is described in the Caputo sense. The solutions to fractional partial differential equation is computed using convergent series. The numerical computations and graphical representations of the analytical results obtained using the homotopy perturbation and decomposition techniques. Moreover, plots that are simple to grasp are used to compare the integer order and fractional-order solutions. After only a few iterations, we may easily obtain numerical results that provide us better approximations. The exact solutions and the derived solutions were observed to be very similar. The suggested methods have also acquired the highest level of accuracy. The most prevalent and convergent techniques for resolving nonlinear fractional-order partial differential issues are the applied techniques.","PeriodicalId":50204,"journal":{"name":"Journal of Engineering Mathematics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139903845","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

Statistical inference of inverted Nadarajah–Haghighi distribution under type-II generalized hybrid censoring competing risks data II 型广义混合普查竞争风险数据下的倒纳达拉贾-哈格希分布的统计推断

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-14 DOI: 10.1007/s10665-023-10331-1

Tahani A. Abushal, Areej M. AL-Zaydi

引用次数: 0

Probabilistic model for cracking localization in reinforced fibrous concrete beams 钢筋纤维混凝土梁裂缝定位的概率模型

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-14 DOI: 10.1007/s10665-023-10330-2

Yuri S. Karinski, Avraham N. Dancygier, Yosef Y. Gebreyesus

引用次数: 0

Dynamic sloshing in a rectangular vessel with porous baffles 带有多孔挡板的矩形容器中的动态荡流

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-10 DOI: 10.1007/s10665-024-10333-7

M. R. Turner

{"title":"Dynamic sloshing in a rectangular vessel with porous baffles","authors":"M. R. Turner","doi":"10.1007/s10665-024-10333-7","DOIUrl":"https://doi.org/10.1007/s10665-024-10333-7","url":null,"abstract":"The damping efficiency of vertical porous baffles is investigated for a dynamically coupled fluid-vessel system. The system comprises of a two-dimensional vessel, with a rectangular cross-section, partially filled with fluid, undergoing rectilinear motions with porous baffles obstructing the fluid motion. The baffles pierce the surface of the fluid, thus the problem can be considered as separate fluid filled regions of the vessel, connected by infinitely thin porous baffles, at which transmission conditions based on Darcy’s law are applied. The fluid is assumed to be inviscid, incompressible and irrotational such that the flow in each region is governed by a velocity potential. The application of Darcy’s law at the baffles is significant as it makes the system non-conservative, and thus the resulting characteristic equation for the normal modes leads to damped modes coupled to the moving vessel. Numerical evaluations of the characteristic equation show that the lowest frequency mode typically has the smallest decay rate, and hence will persist longest in an experimental setup. The maximum decay rate of the lowest frequency mode occurs when the baffles split the vessel into identically sized regions.","PeriodicalId":50204,"journal":{"name":"Journal of Engineering Mathematics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139756392","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

Deflated domain decomposition method for structural problems 结构问题的瘪域分解法

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-08 DOI: 10.1007/s10665-023-10322-2

Hiroshi Akiba

引用次数: 0

Formulation of a non-dimensional criterion for stable dynamical response in coaxial magnetic gears 制定同轴磁齿轮稳定动态响应的非尺寸准则

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-08 DOI: 10.1007/s10665-023-10325-z

Panteleimon Tzouganakis, Vasilios Gakos, Christos Kalligeros, Christos Papalexis, Antonios Tsolakis, Vasilios Spitas

{"title":"Formulation of a non-dimensional criterion for stable dynamical response in coaxial magnetic gears","authors":"Panteleimon Tzouganakis, Vasilios Gakos, Christos Kalligeros, Christos Papalexis, Antonios Tsolakis, Vasilios Spitas","doi":"10.1007/s10665-023-10325-z","DOIUrl":"https://doi.org/10.1007/s10665-023-10325-z","url":null,"abstract":"Coaxial magnetic gears have been investigated thoroughly in recent years. However, magnetic gears are prone to slippage that could be caused by overloading or acceleration of the drive. In the present work, the dynamical system of equations in coaxial magnetic gears was investigated in order to calculate the maximum operational characteristic of the drive. A non-dimensional condition was derived analytically that can determine the dynamical behaviour and whether the system will converge or diverge without the requirement of a numerical solution of the dynamical equation of the drive. A case study was performed where different values of acceleration and applied torque were considered. The convergence of the system was initially examined with the developed non-dimensional condition and then the equation was solved numerically in order to verify the prediction. The developed condition correctly predicted the behaviour of the drive in all cases. Finally, with the developed model the operational characteristics of a coaxial magnetic gear that yield a required transmission error can be calculated analytically. Therefore, with the developed model the maximum operational characteristics in coaxial magnetic gears can be determined analytically with a non-dimensional criterion without implementing iterative methods that would significantly increase the computational cost.","PeriodicalId":50204,"journal":{"name":"Journal of Engineering Mathematics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139756347","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

Shrinkage estimation of θα in gamma density G(1/θ, p) using prior information 利用先验信息对伽马密度 G（1/θ，p）中的 θα 进行收缩估计

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-08 DOI: 10.1007/s10665-023-10329-9

Housila P. Singh, Harshada Joshi, Gajendra K. Vishwakarma

引用次数: 0

A robust role of carbon taxes towards alleviating carbon dioxide: a modeling study 碳税对减缓二氧化碳排放的有力作用：一项模型研究

IF 1.3 4区工程技术

Journal of Engineering Mathematics Pub Date : 2024-02-08 DOI: 10.1007/s10665-023-10327-x

{"title":"A robust role of carbon taxes towards alleviating carbon dioxide: a modeling study","authors":"","doi":"10.1007/s10665-023-10327-x","DOIUrl":"https://doi.org/10.1007/s10665-023-10327-x","url":null,"abstract":"<h3>Abstract</h3> Carbon tax serves as a tool to discourage carbon dioxide ( (text {CO}_2) ) emissions, which are a root cause of climate change. A well-designed tax policy could reduce the risk of climate change, promote innovation in carbon-reducing technologies, and increase public revenue. In this research work, the model formulation is based on dynamic interactions among variables, namely the atmospheric concentration of (text {CO}_2) , human population, forestry biomass, and the levied carbon tax. We assume that the collected revenue is used to control anthropogenic emissions of (text {CO}_2) and fund reforestation/afforestation programs. We have derived sufficient conditions under which the considered dynamical variables settle to their equilibrium levels. The model analysis reveals that the atmospheric level of (text {CO}_2) decreases as the levied tax rate increases, indicating that the atmospheric (text {CO}_2) level can be reversed from its present state through the imposition of a carbon tax. Additionally, the formulated system undergoes Hopf-bifurcation concerning the growth of the levied tax and deforestation rate. Furthermore, through simulations, we have demonstrated that utilizing tax revenues for technologies that limit human-induced (text {CO}_2) emissions and reforestation/afforestation programs is a promising strategy for mitigating the increased levels of (text {CO}_2) .","PeriodicalId":50204,"journal":{"name":"Journal of Engineering Mathematics","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139756345","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