Pub Date : 2021-01-01DOI: 10.18384/2310-7251-2021-4-43-53
S. Gorelov, V. L. Nguyen
{"title":"HEAT FLUX AT A CRITICAL POINT OF AXISYMMETRIC BODIES OF MINIMUM RESISTANCE","authors":"S. Gorelov, V. L. Nguyen","doi":"10.18384/2310-7251-2021-4-43-53","DOIUrl":"https://doi.org/10.18384/2310-7251-2021-4-43-53","url":null,"abstract":"","PeriodicalId":33476,"journal":{"name":"Vestnik moskovskogo gosudarstvennogo oblastnogo universiteta Seriia Fizikamatematika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67953640","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}
Pub Date : 2021-01-01DOI: 10.18384/2310-7251-2021-4-66-74
Timofei A. Rostilov, V. Ziborov, Aleksandr Ju. Dolgoborodov
{"title":"EXPERIMENTAL STUDY OF THE STRUCTURE OF SHOCK WAVES IN A COMPRESSED POWDER OF NIKEL NANOPARTICLES","authors":"Timofei A. Rostilov, V. Ziborov, Aleksandr Ju. Dolgoborodov","doi":"10.18384/2310-7251-2021-4-66-74","DOIUrl":"https://doi.org/10.18384/2310-7251-2021-4-66-74","url":null,"abstract":"","PeriodicalId":33476,"journal":{"name":"Vestnik moskovskogo gosudarstvennogo oblastnogo universiteta Seriia Fizikamatematika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67955103","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}
Pub Date : 2021-01-01DOI: 10.18384/2310-7251-2021-3-39-56
M. M. Kuznetsov, Y. D. Kuleshova
Aim. We have found asymptotically exact values for the distribution function of pairs of molecules in a shock-compressed, binary mixture of gases with a strong difference in the concentrations and molecular weights of its components. Methodology. The research relies on the mathematical methods of theoretical physics related to the calculation of the threshold frequency of collisions based on the kinetic Boltzmann equation. Results. Asymptotically exact analytical expressions are found for the distribution functions of pairs of molecules by the absolute values of their relative velocities. The maxima of these functions are also determined in pairs: light–light, light–heavy and heavy–heavy components. These maxima correspond to the greatest intensities of the effects of high-speed overshoot in the components of the shock-compressed gas mixture. Research implication. The effect of high-speed overshoot in the components of a shock-compressed gas mixture is realized by experimentally modeling it in shock pipes (for example, in the processes of pyrolysis of carbon and carbon-hydrogen compounds). The results obtained in this work are essential for the optimal performance of such experiments.
{"title":"ASYMPTOTIC HIGH-SPEED OVERSHOOT EFFECT VALUE IN A SHOCK-COMPRESSED GAS MIXTURE","authors":"M. M. Kuznetsov, Y. D. Kuleshova","doi":"10.18384/2310-7251-2021-3-39-56","DOIUrl":"https://doi.org/10.18384/2310-7251-2021-3-39-56","url":null,"abstract":"Aim. We have found asymptotically exact values for the distribution function of pairs of molecules in a shock-compressed, binary mixture of gases with a strong difference in the concentrations and molecular weights of its components. Methodology. The research relies on the mathematical methods of theoretical physics related to the calculation of the threshold frequency of collisions based on the kinetic Boltzmann equation. Results. Asymptotically exact analytical expressions are found for the distribution functions of pairs of molecules by the absolute values of their relative velocities. The maxima of these functions are also determined in pairs: light–light, light–heavy and heavy–heavy components. These maxima correspond to the greatest intensities of the effects of high-speed overshoot in the components of the shock-compressed gas mixture. Research implication. The effect of high-speed overshoot in the components of a shock-compressed gas mixture is realized by experimentally modeling it in shock pipes (for example, in the processes of pyrolysis of carbon and carbon-hydrogen compounds). The results obtained in this work are essential for the optimal performance of such experiments.","PeriodicalId":33476,"journal":{"name":"Vestnik moskovskogo gosudarstvennogo oblastnogo universiteta Seriia Fizikamatematika","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67952798","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}
Pub Date : 2021-01-01DOI: 10.18384/2310-7251-2021-4-54-65
E. A. Bedrikova, N. Zverev, Victoria I. Paryonkina, A. Yushkanov
{"title":"QUANTUM ELECTRON PLASMA AND S-WAVE INTERACTION WITH METAL HALF-SPACE","authors":"E. A. Bedrikova, N. Zverev, Victoria I. Paryonkina, A. Yushkanov","doi":"10.18384/2310-7251-2021-4-54-65","DOIUrl":"https://doi.org/10.18384/2310-7251-2021-4-54-65","url":null,"abstract":"","PeriodicalId":33476,"journal":{"name":"Vestnik moskovskogo gosudarstvennogo oblastnogo universiteta Seriia Fizikamatematika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67953931","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}
Pub Date : 2021-01-01DOI: 10.18384/2310-7251-2021-2-61-76
A. S. Khasanov, Anna I. Zvereva
{"title":"GRAPHICAL SENSITIVITY ANALYSIS OF OPTIMAL SOLUTIONS OF LINEAR PROGRAMMING PROBLEMS","authors":"A. S. Khasanov, Anna I. Zvereva","doi":"10.18384/2310-7251-2021-2-61-76","DOIUrl":"https://doi.org/10.18384/2310-7251-2021-2-61-76","url":null,"abstract":"","PeriodicalId":33476,"journal":{"name":"Vestnik moskovskogo gosudarstvennogo oblastnogo universiteta Seriia Fizikamatematika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67952986","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}
Pub Date : 2021-01-01DOI: 10.18384/2310-7251-2021-3-57-69
E. Y. Shamparov, A. Bugrimov, S. Rode, I. N. Zhagrina
{"title":"TERAHERTZ MEASUREMENTS OF SCATTERING AND ABSORBING STRUCTURE CHARACTERISTICS","authors":"E. Y. Shamparov, A. Bugrimov, S. Rode, I. N. Zhagrina","doi":"10.18384/2310-7251-2021-3-57-69","DOIUrl":"https://doi.org/10.18384/2310-7251-2021-3-57-69","url":null,"abstract":"","PeriodicalId":33476,"journal":{"name":"Vestnik moskovskogo gosudarstvennogo oblastnogo universiteta Seriia Fizikamatematika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67953016","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}
Pub Date : 2021-01-01DOI: 10.18384/2310-7251-2021-4-32-42
E. Y. Shamparov, A. Bugrimov, S. Rode, I. N. Zhagrina
{"title":"MEASUREMENT OF CONTRIBUTIONS OF VARIOUS TRANSMISSION TYPES TO RADIATIVE-CONDUCTIVE HEAT TRANSFER IN AIR-FILLED RANDOMLY SCATTERING STRUCTURES","authors":"E. Y. Shamparov, A. Bugrimov, S. Rode, I. N. Zhagrina","doi":"10.18384/2310-7251-2021-4-32-42","DOIUrl":"https://doi.org/10.18384/2310-7251-2021-4-32-42","url":null,"abstract":"","PeriodicalId":33476,"journal":{"name":"Vestnik moskovskogo gosudarstvennogo oblastnogo universiteta Seriia Fizikamatematika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67954125","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}
Pub Date : 2021-01-01DOI: 10.18384/2310-7251-2021-3-6-17
O. Algazin
Aim. The purpose is to find exact solutions of boundary value problems and the Cauchy problem for the Poisson equation in a half-space with polynomial data. Methodology. The paper considers the Dirichlet and Neumann boundary value problems in a half-space and the Cauchy problem with polynomial data for the Poisson equation. These problems are solved using the Fourier transform of generalized functions of slow growth. Results. It is shown that the Cauchy problem with polynomial data for the Poisson equation has a solution that is a polynomial. This solution is the only one in the class of functions of slow growth in hyperplanes parallel to the hyperplane on which the initial conditions are specified. The polynomial solution is obtained explicitly. Each solution from an infinite set of solutions to the Dirichlet or Neumann problem is a solution to some Cauchy problem. Research implications. We have obtained exact solutions to boundary value problems and the Cauchy problem with polynomial data for the Poisson equation.
{"title":"BOUNDARY VALUE PROBLEMS FOR THE POISSON EQUATION IN A HALF-SPACE WITH POLYNOMIAL DATA AND THE CAUCHY PROBLEM","authors":"O. Algazin","doi":"10.18384/2310-7251-2021-3-6-17","DOIUrl":"https://doi.org/10.18384/2310-7251-2021-3-6-17","url":null,"abstract":"Aim. The purpose is to find exact solutions of boundary value problems and the Cauchy problem for the Poisson equation in a half-space with polynomial data. Methodology. The paper considers the Dirichlet and Neumann boundary value problems in a half-space and the Cauchy problem with polynomial data for the Poisson equation. These problems are solved using the Fourier transform of generalized functions of slow growth. Results. It is shown that the Cauchy problem with polynomial data for the Poisson equation has a solution that is a polynomial. This solution is the only one in the class of functions of slow growth in hyperplanes parallel to the hyperplane on which the initial conditions are specified. The polynomial solution is obtained explicitly. Each solution from an infinite set of solutions to the Dirichlet or Neumann problem is a solution to some Cauchy problem. Research implications. We have obtained exact solutions to boundary value problems and the Cauchy problem with polynomial data for the Poisson equation.","PeriodicalId":33476,"journal":{"name":"Vestnik moskovskogo gosudarstvennogo oblastnogo universiteta Seriia Fizikamatematika","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67952691","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}
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