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Mathematical Models and Computer Simulations最新文献

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A Regular Difference Grid and Characteristics Method 正则表达式差分网格和特征方法
Mathematical Models and Computer Simulations Pub Date : 2023-12-01 DOI: 10.1134/s2070048223070116
{"title":"A Regular Difference Grid and Characteristics Method","authors":"","doi":"10.1134/s2070048223070116","DOIUrl":"https://doi.org/10.1134/s2070048223070116","url":null,"abstract":"<span> <h3>Abstract</h3> <p>An explicit characteristics method used to calculate the values of gas-dynamic parameters (GDP) of one-dimensional unsteady flows is considered. An algorithm for solving gas-dynamic equations written along characteristic directions is formulated for use on a regular grid. An example of calculating the problem for a cylindrical pipe is performed. It is shown that with a time integration step of 0.0002 s, the calculation accuracy by the explicit method is close to the results obtained by the implicit method.</p> </span>","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139055763","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
Numerical Modeling of a Melt Flow by the Czochralski Method in the OpenFOAM Package Using a Quasi-Hydrodynamic Algorithm 在 OpenFOAM 软件包中使用准流体力学算法通过 Czochralski 方法建立熔融流数值模型
Mathematical Models and Computer Simulations Pub Date : 2023-12-01 DOI: 10.1134/s2070048223070074
M. A. Kirushina, T. G. Elizarova, A. S. Epikhin
{"title":"Numerical Modeling of a Melt Flow by the Czochralski Method in the OpenFOAM Package Using a Quasi-Hydrodynamic Algorithm","authors":"M. A. Kirushina, T. G. Elizarova, A. S. Epikhin","doi":"10.1134/s2070048223070074","DOIUrl":"https://doi.org/10.1134/s2070048223070074","url":null,"abstract":"","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193013","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
On One Class of Exact Solutions of the Navier–Stokes System of Equations for an Incompressible Fluid 论不可压缩流体纳维-斯托克斯方程组的一类精确解法
Mathematical Models and Computer Simulations Pub Date : 2023-12-01 DOI: 10.1134/s2070048223070037
V. A. Galkin, A. Dubovik
{"title":"On One Class of Exact Solutions of the Navier–Stokes System of Equations for an Incompressible Fluid","authors":"V. A. Galkin, A. Dubovik","doi":"10.1134/s2070048223070037","DOIUrl":"https://doi.org/10.1134/s2070048223070037","url":null,"abstract":"","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139191278","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
Application of the Godunov Scheme to Solve Three-Dimensional Problems of High-Speed Interactions of Elastoplastic Bodies 应用戈杜诺夫方案解决弹塑性体高速相互作用的三维问题
Mathematical Models and Computer Simulations Pub Date : 2023-12-01 DOI: 10.1134/s2070048223070025
K. M. Abuzyarov, M. Abuziarov, A. V. Kochetkov, S. V. Krylov, A. A. Lisitsyn, I. A. Modin
{"title":"Application of the Godunov Scheme to Solve Three-Dimensional Problems of High-Speed Interactions of Elastoplastic Bodies","authors":"K. M. Abuzyarov, M. Abuziarov, A. V. Kochetkov, S. V. Krylov, A. A. Lisitsyn, I. A. Modin","doi":"10.1134/s2070048223070025","DOIUrl":"https://doi.org/10.1134/s2070048223070025","url":null,"abstract":"","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139189464","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
Model of Protective Film Formation in the Vicinity of a Slit Channel During the Convective-Film Cooling of a Plate 板材对流-薄膜冷却过程中狭缝通道附近保护膜的形成模型
Mathematical Models and Computer Simulations Pub Date : 2023-12-01 DOI: 10.1134/s2070048223070153
{"title":"Model of Protective Film Formation in the Vicinity of a Slit Channel During the Convective-Film Cooling of a Plate","authors":"","doi":"10.1134/s2070048223070153","DOIUrl":"https://doi.org/10.1134/s2070048223070153","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Based on the solution of the Reynolds-averaged system of equations of motion of a viscous compressible heat-conducting gas, the thermal and velocity fields of the gas during the formation of convective-film protection of a flat plate are calculated. The gas dynamics are solved using the explicit McCormack method with the splitting of the initial operator along spatial directions and a nonlinear correction scheme. The Spalart−Allmaras turbulence model is used together with the near-wall velocity function. The block finite-difference mesh is constructed by the Thompson method. The fields of the gas dynamic functions on both sides of the plate are determined at different inclination angles of a jet injected from a flat slit. The temperature field of the plate and the film cooling efficiency parameter are defined in a quasi-static approximation. Estimates of the temperature of the plate surfaces are obtained using the velocity and thermal near-wall functions.</p> </span>","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139055463","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
Modeling Sociopsychological Processes of the Formation of the Population’s Position on Vaccine Prevention in the Context of Information Propaganda 信息宣传背景下民众疫苗预防立场形成的社会心理过程建模
Mathematical Models and Computer Simulations Pub Date : 2023-12-01 DOI: 10.1134/s2070048223070098
{"title":"Modeling Sociopsychological Processes of the Formation of the Population’s Position on Vaccine Prevention in the Context of Information Propaganda","authors":"","doi":"10.1134/s2070048223070098","DOIUrl":"https://doi.org/10.1134/s2070048223070098","url":null,"abstract":"<span> <h3>Abstract</h3> <p>This article studies the development and analysis of a model for the formation of the population’s position regarding the influenza virus vaccine prophylaxis within the context of annual recurring seasonal increases in the incidence of influenza. The adoption of a decision on the eve of the next vaccination campaign is taken in accordance with the psychological reaction to the result of the previous year’s decision. A case of the disease is considered as the result of an unsuccessful decision, and its change is related to the nature of the psychological reaction to failure: emotional or restrained. This approach is complemented by taking into account the impact of vaccination and antivaccination propaganda. An analytical expression is obtained for the ratio of stationary proportions of those agreeing and disagreeing with vaccination, which makes it possible to determine those parameter values that ensure the desired ratio.</p> </span>","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139055469","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
Numerical Study of the Effect of Artificial Obstacles on the Occurrence of Hurricane-Force Wind Gusts during the Bora Bora期间人工障碍物对飓风级阵风发生影响的数值研究
Mathematical Models and Computer Simulations Pub Date : 2023-11-04 DOI: 10.1134/s2070048223060029
M. V. Abakumov
{"title":"Numerical Study of the Effect of Artificial Obstacles on the Occurrence of Hurricane-Force Wind Gusts during the Bora","authors":"M. V. Abakumov","doi":"10.1134/s2070048223060029","DOIUrl":"https://doi.org/10.1134/s2070048223060029","url":null,"abstract":"","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135773313","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 Effect of Ballistic Parameters of Meteoroids on Their Destruction in the Earth’s Atmosphere 流星体的弹道参数对其在地球大气层中毁灭的影响
Mathematical Models and Computer Simulations Pub Date : 2023-11-04 DOI: 10.1134/s2070048223060054
V. A. Andrushchenko, N. G. Syzranova
{"title":"The Effect of Ballistic Parameters of Meteoroids on Their Destruction in the Earth’s Atmosphere","authors":"V. A. Andrushchenko, N. G. Syzranova","doi":"10.1134/s2070048223060054","DOIUrl":"https://doi.org/10.1134/s2070048223060054","url":null,"abstract":"","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135773319","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
Explicit Numerical Algorithm for the Nonhydrostatic Fluid Dynamics Equations Based on the CABARET Scheme 基于CABARET格式的非静力流体动力学方程的显式数值算法
Mathematical Models and Computer Simulations Pub Date : 2023-11-04 DOI: 10.1134/s2070048223060108
V. M. Goloviznin, Petr A. Mayorov, Pavel A. Mayorov, A. V. Solovjev, N. A. Afanasiev
{"title":"Explicit Numerical Algorithm for the Nonhydrostatic Fluid Dynamics Equations Based on the CABARET Scheme","authors":"V. M. Goloviznin, Petr A. Mayorov, Pavel A. Mayorov, A. V. Solovjev, N. A. Afanasiev","doi":"10.1134/s2070048223060108","DOIUrl":"https://doi.org/10.1134/s2070048223060108","url":null,"abstract":"","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135773324","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
When an Implicit Scheme is Monotonic 当隐式格式是单调的
Mathematical Models and Computer Simulations Pub Date : 2023-11-04 DOI: 10.1134/s207004822306011x
V. A. Gordin
{"title":"When an Implicit Scheme is Monotonic","authors":"V. A. Gordin","doi":"10.1134/s207004822306011x","DOIUrl":"https://doi.org/10.1134/s207004822306011x","url":null,"abstract":"","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135773301","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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