International Journal of Nonlinear Sciences and Numerical Simulation最新文献_第3页

Catalytic surface reaction on a vertical wavy surface placed in a non-Darcy porous medium 非达西多孔介质中垂直波状表面上的催化表面反应

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-17 DOI: 10.1515/ijnsns-2020-0198

N. C. Roy

{"title":"Catalytic surface reaction on a vertical wavy surface placed in a non-Darcy porous medium","authors":"N. C. Roy","doi":"10.1515/ijnsns-2020-0198","DOIUrl":"https://doi.org/10.1515/ijnsns-2020-0198","url":null,"abstract":"Abstract A mathematical model is developed to analyze the free convection flow induced by catalytic surface reaction on a vertical wavy surface embedded in a non-Darcy porous medium. The governing equations are transformed using a generalized transformation which are valid near to and far from the leading edge. We then solve the resulting equations employing finite difference method. A comparison between the present solutions and the results of a past study is made which provides a good agreement. Numerical results reveal that the wall temperature and the surface concentration are enhanced for higher heat release parameter. An increase in the amplitude of the wavy surface and the reactant consumption parameter causes a decrease in the wall temperature and the surface concentration. Due to the increase of the reduced Darcy number the wall temperature substantially becomes higher whereas the surface concentration diminishes. However, a converse characteristic is observed in the case of the activation energy parameter. The momentum, thermal and concentration boundary layers are significantly increased for higher values of the reduced Darcy number and the consumption reactant parameter. Contrary to this, the larger heat release parameter reduces the thicknesses of the momentum, thermal and concentration boundary layers.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41891714","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

Power minimization of gas transmission network in fully transient state using metaheuristic methods 基于元启发式方法的输气管网全暂态功率最小化

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-17 DOI: 10.1515/ijnsns-2020-0057

Hamid Reza Moetamedzadeh, Hossein Khodabakhshi Rafsanjani

{"title":"Power minimization of gas transmission network in fully transient state using metaheuristic methods","authors":"Hamid Reza Moetamedzadeh, Hossein Khodabakhshi Rafsanjani","doi":"10.1515/ijnsns-2020-0057","DOIUrl":"https://doi.org/10.1515/ijnsns-2020-0057","url":null,"abstract":"Abstract In gas transmission networks, the pressure drop caused by friction is one of the main operation costs that is compensated through consuming energy in the compressors. In the competitive market of energy, considering the demand variation is inevitable. Hence, the power minimization should be carried out in transient state. Since the minimization problem is severely nonlinear and nonconvex subjected to nonlinear constraints, utilizing a powerful minimization tool with a straightforward procedure is very helpful. In this paper, a novel approach is proposed based on metaheuristic algorithms for power minimization of a gas transmission network in fully transient conditions. The metaheuristic algorithms, unlike the gradient dependent method, can solve the complicated minimization problem without simplification. In the proposed strategy, the cost function is not expressed explicitly as a function of minimization variables; therefore, the transient minimization can be as precise as possible. The minimization is carried out by a straightforward methodology in each time sample, which leads to more precise solutions as compared to the quasi transient minimization. The metaheuristic minimizer, called the particle swarm optimization gravitational search algorithm (PSOGSA), is utilized to find the optimum operating set points. The numerical results also confirm the accuracy and well efficiency of the proposed method.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49427286","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

A new self-adaptive inertial CQ-algorithm for solving convex feasibility and monotone inclusion problems 求解凸可行性和单调包含问题的一种新的自适应惯性cq算法

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-14 DOI: 10.1515/ijnsns-2021-0322

C. Enyi, O. Iyiola, Chinedu G. Ezea

引用次数: 0

Higher order Traub–Steffensen type methods and their convergence analysis in Banach spaces Banach空间中的高阶Traub–Steffensen型方法及其收敛性分析

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-14 DOI: 10.1515/ijnsns-2021-0202

Deepak Kumar, J. Sharma, Harmandeep Singh

引用次数: 1

Spectral collocation method approach to thermal stability of MHD reactive squeezed fluid flow through a channel MHD反应性挤压流体通道热稳定性的谱配点法研究

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-14 DOI: 10.1515/ijnsns-2021-0111

E. Titiloye, A. Adeosun, J. Ukaegbu

{"title":"Spectral collocation method approach to thermal stability of MHD reactive squeezed fluid flow through a channel","authors":"E. Titiloye, A. Adeosun, J. Ukaegbu","doi":"10.1515/ijnsns-2021-0111","DOIUrl":"https://doi.org/10.1515/ijnsns-2021-0111","url":null,"abstract":"Abstract The current study focuses on the thermal stability of exothermic MHD reactive squeezed fluid flow between parallel plates. The problem’s governing nonlinear partial differential equations are transformed into dimensionless ones. The dimensionless equations obtained are highly nonlinear and are then numerically solved using the spectral collocation method (SCM). The acquired results are verified using Runge–Kutta fourth-fifth order (RK45) combined with shooting method, and a good agreement is achieved. Some graphs and tables are provided to examine the exothermic combustion process by focusing on the effects of emergent kinetic parameters such as activation energy, heat generation, and squeezed flow on the temperature profile and thermal stability of the system. It is discovered that the activation energy parameter tends to minimize the temperature profile while also improving the system’s thermal stability. However, the squeezed parameter and the heat generation rate parameter increase exothermic chemical reactions, causing the system to become unstable.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47892986","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

A study on solvability of the fourth-order nonlinear boundary value problems 四阶非线性边值问题可解性的研究

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-14 DOI: 10.1515/ijnsns-2021-0052

Haide Gou

引用次数: 0

Numerical simulation for generalized space-time fractional Klein–Gordon equations via Gegenbauer wavelet 基于Gegenbauer小波的广义时空分数阶Klein-Gordon方程数值模拟

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-14 DOI: 10.1515/ijnsns-2021-0304

M. Faheem, Arshad Khan, Muslim Malik, A. Debbouche

引用次数: 0

Extended logistic map for encryption of digital images 用于数字图像加密的扩展逻辑映射

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-13 DOI: 10.1515/ijnsns-2022-0028

Hanis Stanley, Amutha Ramachandran

引用次数: 3

Bifurcation, chaos, and circuit realisation of a new four-dimensional memristor system 一种新的四维忆阻器系统的分岔、混沌和电路实现

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-13 DOI: 10.1515/ijnsns-2021-0393

X. Jiang, Jianhao Li, Bo Li, Wei-shuai Yin, Li Sun, Xiangyong Chen

引用次数: 13

Theoretical assessment of the impact of awareness programs on cholera transmission dynamic 提高认识方案对霍乱传播动态影响的理论评估

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-13 DOI: 10.1515/ijnsns-2021-0341

Daudel Tchatat, G. Kolaye, S. Bowong, A. Temgoua

{"title":"Theoretical assessment of the impact of awareness programs on cholera transmission dynamic","authors":"Daudel Tchatat, G. Kolaye, S. Bowong, A. Temgoua","doi":"10.1515/ijnsns-2021-0341","DOIUrl":"https://doi.org/10.1515/ijnsns-2021-0341","url":null,"abstract":"Abstract In this paper, we propose and analyse a mathematical model of the transmission dynamics of cholera incorporating awareness programs to study the impact of socio-media and education on cholera outbreaks. These programs induce behavioural changes in the population, which divide the susceptible class into two subclasses, aware individuals and unaware individuals. We first provide a basic study of the model. We compute the Disease-Free Equilibrium (DFE) and derive the basic reproduction number R 0 0 ${mathcal{R}}_{0}^{0}$ that determines the extinction and the persistence of the disease. We show that there exists a threshold parameter ξ such that when R 0 0 ≤ ξ < 1 ${mathcal{R}}_{0}^{0}le xi < 1$ , the DFE is globally asymptotically stable, but when ξ ≤ R 0 0 < 1 $xi le {mathcal{R}}_{0}^{0}< 1$ , the model exhibits the phenomenon of backward bifurcation on a feasible region. The model exhibits one endemic equilibrium locally stable when R 0 0 > 1 ${mathcal{R}}_{0}^{0} > 1$ and in that condition the DFE is unstable. Various cases for awareness proportions are performed using the critical awareness rate in order to measure the effect of awareness programs on the infected individuals over time. The results we obtained show that the higher implementation of strategies combining awareness programs and therapeutic treatments increase the efficacy of control measures. The numerical simulations of the model are used to illustrate analytical results and give more precision on critical values on the controls actions.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47087907","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