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The Problem of Derivation of the Magnus Formula 马格努斯公式的推导问题
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110040
S. O. Gladkov
{"title":"The Problem of Derivation of the Magnus Formula","authors":"S. O. Gladkov","doi":"10.1134/S1028335822110040","DOIUrl":"10.1134/S1028335822110040","url":null,"abstract":"<p>On the basis of the condition of the flow potentiality of the hydrodynamic stream flowing around a stationary rotating ball, a detailed analytical derivation of the formula for the Magnus force describing the nondissipative lateral impact from the direction of the progressively moving viscous flow is given for the first time.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"451 - 453"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4945054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On a Hyperbolic Equation for the Rayleigh Wave 关于瑞利波的双曲方程
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100056
J. D. Kaplunov, D. A. Prikazchikov, R. F. Sabirova
{"title":"On a Hyperbolic Equation for the Rayleigh Wave","authors":"J. D. Kaplunov,&nbsp;D. A. Prikazchikov,&nbsp;R. F. Sabirova","doi":"10.1134/S1028335822100056","DOIUrl":"10.1134/S1028335822100056","url":null,"abstract":"<p>A 1D hyperbolic equation is derived for the Rayleigh wave induced by prescribed surface loading. The wave operator turns out to be independent of the vertical coordinate, which appears only in the right hand side of the equation as a parameter within the pseudo-differential operator acting on the given load. It is shown that in case of the classical 2D Lamb problem this operator causes smoothening of the surface concentrated impulse as the depth increases. The suggested formulation enables revealing of the peculiarities of surface elastic wave.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"424 - 427"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5289391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Generalized Approach to Interference Invariant of the Hydroacoustic Field in Deep and Shallow Seas 深浅海水声场干涉不变性的广义方法
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100019
S. P. Aksenov, G. N. Kuznetsov
{"title":"A Generalized Approach to Interference Invariant of the Hydroacoustic Field in Deep and Shallow Seas","authors":"S. P. Aksenov,&nbsp;G. N. Kuznetsov","doi":"10.1134/S1028335822100019","DOIUrl":"10.1134/S1028335822100019","url":null,"abstract":"<p>A new definition of the hydroacoustic field invariant based on a stable estimate of the invariance of orthogonal projections of the sound-pressure-phase gradients on the “distance–frequency” plane is introduced. Such a definition generalizes the concept of an invariant to all existing zones of shallow and deep seas including the near and far zones of illumination of the deep sea in which it is impossible to estimate and apply the Chuprov interference invariant. In the zone of existence of the Chuprov invariant, its values almost coincide with the values of the new invariant.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"442 - 446"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5289405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of the Intensities of Chemical and Physical Processes Occurring during Laser-Induced Breakdown of Colloidal Solutions of Tb Nanoparticles with Different Oxidation States 不同氧化态Tb纳米粒子胶体溶液激光击穿过程中化学和物理过程强度的比较
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110076
A. V. Simakin, I. V. Baymler, V. V. Smirnova, M. E. Astashev, V. V. Voronov,  A. S. Dorokhov, S. V. Gudkov
{"title":"Comparison of the Intensities of Chemical and Physical Processes Occurring during Laser-Induced Breakdown of Colloidal Solutions of Tb Nanoparticles with Different Oxidation States","authors":"A. V. Simakin,&nbsp;I. V. Baymler,&nbsp;V. V. Smirnova,&nbsp;M. E. Astashev,&nbsp;V. V. Voronov,&nbsp; A. S. Dorokhov,&nbsp;S. V. Gudkov","doi":"10.1134/S1028335822110076","DOIUrl":"10.1134/S1028335822110076","url":null,"abstract":"<p>A technique for synthesizing Tb nanoparticles using laser ablation in various liquid media (MQ water, ethanol, isopropyl alcohol, and isobutanol) is considered with the aim of preparing colloidal solutions of Tb nanoparticles, containing different amounts of oxidized particles. The synthesis of nanoparticles in isobutyl alcohol exhibits the lowest percentage of oxidized particles relative to the total number of particles in the resulting colloid, with a final ratio of oxidized Tb<sub>2</sub>O<sub>3</sub> particles to all particles close to 5%. The influence of oxidized particles on the intensity of physicochemical processes (formation of plasma, shock waves, acoustic signals, and chemical products as a result of dissociation of water molecules) occurring during optical breakdown of colloidal solutions, has been investigated. The general tendency of the influence of oxidized particles consists in an increase in the intensity of the aforementioned characteristics upon laser breakdown with an increase in the Tb<sub>2</sub>O<sub>3</sub> fraction with respect to the total number of particles in the colloid. The observed effect is presumably related to the high aggregability of Tb<sub>2</sub>O<sub>3</sub> particles, while the absorption coefficient of particles is of minor importance.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"465 - 471"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4940979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Characteristics of Solar Cells Based on Polycrystalline Silicon 多晶硅太阳能电池的特性研究
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110015
B. M. Abdurakhmanov, M. M. Adilov,  M. Kh. Ashurov, Kh. B. Ashurov
{"title":"Characteristics of Solar Cells Based on Polycrystalline Silicon","authors":"B. M. Abdurakhmanov,&nbsp;M. M. Adilov,&nbsp; M. Kh. Ashurov,&nbsp;Kh. B. Ashurov","doi":"10.1134/S1028335822110015","DOIUrl":"10.1134/S1028335822110015","url":null,"abstract":"<p>The results of comparison of the efficiency and radiation resistance of solar cells made of single-crystal silicon and polycrystalline silicon (multisilicon) are presented. It is shown that film solar cells synthesized with using the chloride process when using multisilicon as a substrate material are not inferior in their characteristics to solar cells made of single-crystal silicon.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"439 - 441"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Setting of Requirements for Steam-Explosion Plants 蒸汽爆炸装置要求的设定
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110039
O. R. Ganiev, I. N. Grishnyaev
{"title":"Setting of Requirements for Steam-Explosion Plants","authors":"O. R. Ganiev,&nbsp;I. N. Grishnyaev","doi":"10.1134/S1028335822110039","DOIUrl":"10.1134/S1028335822110039","url":null,"abstract":"<p>Based on the analysis of the physical processes that occur during a steam explosion, it is shown that, in plants of this type, it is necessary to provide the homogeneous-nucleation mode with the fluctuation frequency of formation of viable vapor-phase nuclei in the unit volume of liquid of at least 10<sup>8</sup> m<sup>–3</sup> s<sup>–1</sup> and the relative value of liquid overheating of ~1. On the basis of a standard autoclave, a steam-explosion plant that meets the specified requirements is designed and manufactured.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"472 - 474"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4940968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selective Laser Heating of Closed Cavity Shells Filled with Liquid 液体填充封闭腔壳的激光选择性加热
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822120047
S. N. Mokrin, M. A. Guzev, D. A. Tereshko, A. V. Kulik, S. S. Minaev, I. A. Abushkin, V. M. Chudnovsky
{"title":"Selective Laser Heating of Closed Cavity Shells Filled with Liquid","authors":"S. N. Mokrin,&nbsp;M. A. Guzev,&nbsp;D. A. Tereshko,&nbsp;A. V. Kulik,&nbsp;S. S. Minaev,&nbsp;I. A. Abushkin,&nbsp;V. M. Chudnovsky","doi":"10.1134/S1028335822120047","DOIUrl":"10.1134/S1028335822120047","url":null,"abstract":"<p>A method for selective heating of a cavity shell filled with liquid using heated submerged jets generated by laser heating of a liquid at the end of an optical fiber introduced into the cavity is investigated. It is experimentally shown that the jets, passing through the “cold” surrounding liquid, collide with the shell and heat it, while the temperature of the surrounding liquid rises insignificantly. Numerical simulation of this process allows us to estimate the heating time of closed shells to the temperature of thermal modification of the walls of pathological objects and sanitation of surfaces depending on the power of laser radiation. It is important to consider the obtained result during laser-induced precision cleaning and sanitation of surfaces in closed volumes when developing medical technologies for laser surgical treatment of pathologically altered vessels, cysts, and other applications.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 12","pages":"491 - 494"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Aerodynamic Heating of a Blunted Plate in the Regime of Strong Viscous–Inviscid Interaction 钝板在强粘-无粘相互作用下的气动加热
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822120011
N. I. Batura, G. N. Dudin
{"title":"Aerodynamic Heating of a Blunted Plate in the Regime of Strong Viscous–Inviscid Interaction","authors":"N. I. Batura,&nbsp;G. N. Dudin","doi":"10.1134/S1028335822120011","DOIUrl":"10.1134/S1028335822120011","url":null,"abstract":"<p>The heating of the surface of a blunted plate made of a material with low thermal conductivity is experimentally investigated in a wind tunnel under the strong interaction regime. The flow in the boundary layer on the plate is nonstationary, since the temperature of the plate surface continuously increases during the start-up, and its distribution over the surface is variable. The installation of a wedge in the vicinity of the trailing edge of the plate leads to changes in the area of the perturbed flow and in the temperature distribution on the surface of the plate in front of it up to the leading edge as compared to the case of flow around a plate without a wedge. These changes are explained by the propagation of pressure perturbations caused by the installation of the wedge along the subsonic part of the boundary layer against the flow.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 12","pages":"477 - 479"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Traveling Waves in Nondispersive Strongly Inhomogeneous Media 非色散强非均匀介质中的行波
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100081
E. N. Pelinovsky, O. V. Kaptsov
{"title":"Traveling Waves in Nondispersive Strongly Inhomogeneous Media","authors":"E. N. Pelinovsky,&nbsp;O. V. Kaptsov","doi":"10.1134/S1028335822100081","DOIUrl":"10.1134/S1028335822100081","url":null,"abstract":"<p>Methods to obtain solutions describing traveling waves in strongly inhomogeneous media are discussed within a linear wave equation with a variable speed (speed of sound). It is shown that there is a wide range of propagation speed variations that allow for the existence of waves that do not reflect despite the strong inhomogeneity of the medium. In this case, the shape of the wave and its characteristics change with distance. These waves can transfer energy over long distances without loss.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"415 - 419"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4939467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heat Transfer Processes at Early Stages of Crystal Nucleation in Glass-Forming Materials and Polymers 玻璃成形材料和聚合物晶体成核初期的传热过程
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110064
A. A. Minakov
{"title":"Heat Transfer Processes at Early Stages of Crystal Nucleation in Glass-Forming Materials and Polymers","authors":"A. A. Minakov","doi":"10.1134/S1028335822110064","DOIUrl":"10.1134/S1028335822110064","url":null,"abstract":"<p>Local thermal perturbations in supercooled glass-forming liquids during the nucleation and decay of nuclei of the crystalline phase are analyzed. The nonequilibrium thermal response of glass-forming materials to fast local thermal perturbations is described using an integral equation with dynamic heat capacity. It is shown that local thermal perturbations associated with the formation of nuclei of the crystalline phase significantly affect the nucleation rate in supercooled glass-forming liquids. The obtained fundamental knowledge can be useful for the technology of new nanostructured materials, polymers and nanocomposites.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"459 - 464"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4944644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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