International Journal of Nonlinear Sciences and Numerical Simulation最新文献_第2页

Numerical modeling of the dam-break flood over natural rivers on movable beds 天然河流动床溃坝洪水的数值模拟

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-11-28 DOI: 10.1515/ijnsns-2021-0273

A. Issakhov, Aliya Borsikbayeva, A. Abylkassymova, A. Issakhov, A. Khikmetov

{"title":"Numerical modeling of the dam-break flood over natural rivers on movable beds","authors":"A. Issakhov, Aliya Borsikbayeva, A. Abylkassymova, A. Issakhov, A. Khikmetov","doi":"10.1515/ijnsns-2021-0273","DOIUrl":"https://doi.org/10.1515/ijnsns-2021-0273","url":null,"abstract":"Abstract In the present work, a modified numerical model was developed to simulate the water flow during a dam break with the mud layer transfer of different heights, consisting of three phases (water, air, and a phase for deposition). To carry out a numerical simulation of this process, a mathematical model based on the VOF (volume of fluid) method was modified, taking into account the movement of the water-free surface, which is carried out by the movement of water flow based on the Newtonian fluid model, and the movement of mud impurities is based on the non-Newtonian fluid model. Validation of the constructed model for the influence of three-dimensional features of the flow on morphological changes is carried out by a modified mathematical model and compared with the results of calculation for two-dimensional (2D) and three-dimensional (3D) models. The proposed method for modeling is applied on a real complex terrain, which was based on the Kargalinka – a river in Almaty and the Almaty region of Kazakhstan, the right tributary of the Kaskelen River. Simulation analysis is carried out for cases with different deposit heights. All results of the numerical simulation can be visually viewed using graphs and illustrations.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46465076","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

Numerical modeling of thermal influence to pollutant dispersion and dynamics of particles motion with various sizes in idealized street canyon 理想街道峡谷中热影响污染物扩散及不同粒径颗粒运动动力学的数值模拟

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-11-18 DOI: 10.1515/ijnsns-2020-0168

A. Issakhov, P. Omarova, A. Mashenkova, A. Abylkassymova

{"title":"Numerical modeling of thermal influence to pollutant dispersion and dynamics of particles motion with various sizes in idealized street canyon","authors":"A. Issakhov, P. Omarova, A. Mashenkova, A. Abylkassymova","doi":"10.1515/ijnsns-2020-0168","DOIUrl":"https://doi.org/10.1515/ijnsns-2020-0168","url":null,"abstract":"Abstract In this paper, a numerical simulation of air pollution and the particles distribution in idealized urban canyons with aspect ratio 1 for various thermal conditions was considered. To solve the problem, the RANS equations were used, while various turbulent models were used to close this system of equations. To validate of the mathematical model was solved the test problem in isothermal condition numerically. The various turbulent models results were compared with empirical and modeling results. The main problem was described as the pollutants emission process and particles between houses using various grass barrier types under different temperature regimes. The results of computational simulation without grass barrier were compared with the calculated values using different types of grass barriers. In the course of various studies, it was found that the existence of barriers along the streets reduces the concentration of harmful substances and the concentration of particles in the air. Increasing the thermal value for a roadside barrier reduces deposition and dispersion of pollutants.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":"24 1","pages":"277 - 318"},"PeriodicalIF":1.5,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48638227","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 class of piecewise fractional functional differential equations with impulsive 一类带脉冲的分段分数阶泛函微分方程

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-11-01 DOI: 10.1515/ijnsns-2021-0306

Mei Jia, Tingle Li, X. Liu

引用次数: 0

Existence and Hyers–Ulam stability of solutions for nonlinear three fractional sequential differential equations with nonlocal boundary conditions 具有非局部边界条件的非线性三分数阶序微分方程解的存在性和Hyers-Ulam稳定性

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-27 DOI: 10.1515/ijnsns-2022-0152

M. Subramanian, M. Manigandan, A. Zada, T. Gopal

引用次数: 2

Existence and Hyers–Ulam stability of solutions to a nonlinear implicit coupled system of fractional order 一类分数阶非线性隐式耦合系统解的存在性和Hyers-Ulam稳定性

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-20 DOI: 10.1515/ijnsns-2022-0250

A. Zada, A. Ali, U. Riaz

引用次数: 1

Fredholm determinants and Z n -mKdV/Z n -sinh-Gordon hierarchies Fredholm行列式和zn -mKdV/ zn -sinh-Gordon层次结构

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-19 DOI: 10.1515/ijnsns-2020-0188

Chuanzhong Li, Wenna Liu

引用次数: 0

Adaptive control for position and force tracking of uncertain teleoperation with actuators saturation and asymmetric varying time delays 具有饱和和不对称变时滞的不确定遥操作位置和力跟踪的自适应控制

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-19 DOI: 10.1515/ijnsns-2021-0429

M. Pourseifi, S. Rezaei

引用次数: 2

Legendre wavelet residual approach for moving boundary problem with variable thermal physical properties 变热物性运动边界问题的Legendre小波残差法

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-19 DOI: 10.1515/ijnsns-2019-0076

Jitendra, Vikas Chaurasiya, K. N. Rai, J. Singh

{"title":"Legendre wavelet residual approach for moving boundary problem with variable thermal physical properties","authors":"Jitendra, Vikas Chaurasiya, K. N. Rai, J. Singh","doi":"10.1515/ijnsns-2019-0076","DOIUrl":"https://doi.org/10.1515/ijnsns-2019-0076","url":null,"abstract":"Abstract The main aim of the current article is to describe an uni-dimensional moving boundary problem with conduction and convection effect when thermal conductivity and specific heat varying linearly with temperature and time. The Mathematical model has nonlinearity due to presence of variable thermal conductivity and specific heat. A Legendre wavelet residual approach is introduced to get the solution of the problem with high accuracy. The surface heat flux is taken as an exponent function of time while latent heat is presented as an exponent function of position. Galerkin technique is used to obtain the numerical solution in case of constant physical properties while collocation technique is used for variable thermal physical properties. When it is considered that thermal physical properties are constant then obtained numerical solution was compared with exact solution and found in good acceptance. The effect of convection and variable thermal conductivity with time and temperature on the location of the moving layer thickness is analyzed. Further the effect of Peclet number and other physical parameters on the location of moving layer thickness are discussed in detail.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":"23 1","pages":"957 - 970"},"PeriodicalIF":1.5,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45606337","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: 9

Coordinated target tracking in sensor networks by maximizing mutual information 基于互信息最大化的传感器网络协调目标跟踪

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2022-10-18 DOI: 10.1515/ijnsns-2018-0100

Yintao Wang, Fuchao Xie

引用次数: 0

Stability with mixed H ∞/passivity performance analysis of fractional-order neutral delayed Markovian jumping neural networks 分数阶中立型延迟马尔可夫跳变神经网络的混合H∞稳定性/无源性能分析

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-2021-0447

Narasimman Padmaja, P. Balasubramaniam

{"title":"Stability with mixed H ∞/passivity performance analysis of fractional-order neutral delayed Markovian jumping neural networks","authors":"Narasimman Padmaja, P. Balasubramaniam","doi":"10.1515/ijnsns-2021-0447","DOIUrl":"https://doi.org/10.1515/ijnsns-2021-0447","url":null,"abstract":"Abstract A detailed survey of existing works on fractional-order nonlinear systems reveals the fact that practically no results exist on stability or any performance analysis of Markovian jumping fractional-order systems (FOSs) in general. The main reason is the theory of infinitesimal generator used to estimate the derivative of Lyapunov–Krasovskii Functional (LKF) is not well-developed in the fractional domain. This shortage, in theory, is focussed in this manuscript. In this work, we provide a lemma that aids in analyzing the stability of fractional-order delayed systems via integer-order derivative of LKF. Using this lemma, by constructing a new suitable LKF and employing known integral inequalities, linear matrix inequality (LMI)-based sufficient conditions that ensure stability along with H ∞/passive performance of the proposed fractional-order neural networks (FONNs) with Markovian jumping parameters are derived for the first time. Unlike the existing works, the results derived in the present study depend on the fractional order (FO) of the NNs. The importance of such order-dependent criteria is highlighted in numerical examples. Finally, the simulation results are given to show the reliability of the derived conditions.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48986958","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