Pub Date : 2023-11-02DOI: 10.1080/17455030.2022.2076957
Andreas Muschinski, Eric L. Wagner
First results of optical turbulence field measurements collected with a newly developed fine-wire temperature sensing system are presented and discussed. The centerpiece of the sensing system is an array of fine-wire platinum resistance thermometers. The active fine wire in each sensor element has a diameter of 0.64 μm and a length between 0.5 and 1 mm. The sampling rate is 44.1 kHz, and the noise level is 1 mK for a bandwidth of 10 kHz. Data were recorded while the car onto which the sensors were mounted was traveling at a speed of about 40 mph, or 18 m s−1. Estimates of the temperature structure function Dθθ(r) are compared against the classical Obukhov-Corrsin theory, which predicts rα power-law asymptotes with α=2 in the viscous-diffusive range and α=2/3 in the inertial-convective range. For the pair of separations r1=5 cm and r2=10 cm, we observed α=0.63±0.06. The frequency spectrum Sθθ(f) follows the theoretically predicted f−5/3 power law in the inertial-convective subrange. The ‘Hill bump’ in the transition regime between the inertial-convective and viscous-diffusive subranges is visible.
{"title":"First field measurements of optical turbulence near the ground with a newly developed fine-wire thermometer","authors":"Andreas Muschinski, Eric L. Wagner","doi":"10.1080/17455030.2022.2076957","DOIUrl":"https://doi.org/10.1080/17455030.2022.2076957","url":null,"abstract":"First results of optical turbulence field measurements collected with a newly developed fine-wire temperature sensing system are presented and discussed. The centerpiece of the sensing system is an array of fine-wire platinum resistance thermometers. The active fine wire in each sensor element has a diameter of 0.64 μm and a length between 0.5 and 1 mm. The sampling rate is 44.1 kHz, and the noise level is 1 mK for a bandwidth of 10 kHz. Data were recorded while the car onto which the sensors were mounted was traveling at a speed of about 40 mph, or 18 m s−1. Estimates of the temperature structure function Dθθ(r) are compared against the classical Obukhov-Corrsin theory, which predicts rα power-law asymptotes with α=2 in the viscous-diffusive range and α=2/3 in the inertial-convective range. For the pair of separations r1=5 cm and r2=10 cm, we observed α=0.63±0.06. The frequency spectrum Sθθ(f) follows the theoretically predicted f−5/3 power law in the inertial-convective subrange. The ‘Hill bump’ in the transition regime between the inertial-convective and viscous-diffusive subranges is visible.","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"76 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135975920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-11-02DOI: 10.1080/17455030.2022.2081738
Sergey Georgievich Chefranov
ABSTRACTThe paper presents a review of the results that allowed us to find an exact analytical solution to the main problem of the turbulence theory consisting in a closed description of any moments and spectra of all random fields that are described by the Euler hydrodynamic equations for a compressible medium. This solution is based on an exact and explicit analytical solution to n-dimensional Euler equations in the limit of large Mach numbers (S. G. Chefranov, 1991). Based on the Dirac delta function theory, this solution gives an n-dimensional generalization of the well-known implicit Riemann (1860) solution to the one-dimensional Euler equations. In the one-dimensional case, the resulting solution exactly coincides with the explicit form of the Riemann solution for an arbitrary Mach numbers. We have obtained for the first time the exact value of the universal scaling exponent -2/3 for a spectrum of the turbulence energy dissipation rate corresponds to the exact analytical solution to fourth-order two-point moments of the velocity field gradient. We have noted a good agreement between this value and the observational data of turbulence intermittency in the surface atmosphere layer (M. Z. Kholmyansky, 1972) and with the findings of the well-known turbulence intermittency model by Novikov-Stewart (1964).KEYWORDS: Fluid flowRiemann waveturbulencecompressibilityviscosity AcknowledgmentsThe author dedicate this paper to the memory of Valerian Il’ich Tatarskii (October 13, 1929–April 19, 2020), an outstanding man and science researcher. The author sincerely grateful to Valerian Il’ich for his care. I express my kind gratitude to Ya. G. Sinai for a detailed and friendly discussion at his seminar in Moscow on July 9, 2019 and further support of the works presented in this article. The author also grateful for the similar support and interest in the work to G. S. Golitsyn, L. P. Pitaevskii and U. Frisch. I thank E. A. Novikov, L. A. Ostrovsky and I. Procaccia for attention to the work and useful discussions, as well as M. Kholmyansky, V. Yakhot and S.N. Gurbatov for the articles sent and their analysis.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementData available within the article or its supplementary materials.Additional informationFundingThe study was supported by the Russian Science Foundation [grant number 14-17-00806P] and by Israel Science Foundation [grant number 492/18].
摘要本文回顾了一些结果，这些结果使我们找到了湍流理论主要问题的精确解析解，该问题是由可压缩介质的欧拉流体动力方程所描述的所有随机场的任意矩和谱的封闭描述构成的。该解是基于大马赫数极限下n维欧拉方程的精确和显式解析解(S. G. Chefranov, 1991)。基于狄拉克函数理论，这个解决方案给出了众所周知的隐式黎曼(1860)解决一维欧拉方程的n维推广。在一维情况下，得到的解与任意马赫数的黎曼解的显式形式完全一致。我们首次得到了湍流能量耗散率谱的通用标度指数-2/3的精确值与速度场梯度的四阶两点矩的精确解析解相对应。我们注意到，这个值与地面大气层湍流间歇性的观测资料(M. Z. Kholmyansky, 1972)和著名的Novikov-Stewart湍流间歇性模型(1964)的发现非常吻合。关键词:流体流动黎曼波湍流可压缩性黏度作者谨以此纪念杰出的科学工作者瓦勒里安·伊里奇·塔塔尔斯基(1929年10月13日- 2020年4月19日)。作者衷心感谢Valerian Il 'ich对他的关照。我向雅表示衷心的感谢。G. Sinai于2019年7月9日在莫斯科举行的研讨会上进行了详细而友好的讨论，并进一步支持本文所呈现的作品。作者也感谢G. S. Golitsyn, L. P. Pitaevskii和U. Frisch对工作的类似支持和兴趣。我感谢E. A.诺维科夫、L. A.奥斯特洛夫斯基和I. Procaccia对工作的关注和有益的讨论，以及M. Kholmyansky、V. Yakhot和S.N. Gurbatov的文章和他们的分析。披露声明作者未报告潜在的利益冲突。数据可用性声明文章或其补充材料中可用的数据。本研究由俄罗斯科学基金会[资助号14-17-00806P]和以色列科学基金会[资助号492/18]资助。
{"title":"Riemann’s wave and an exact solution of the main turbulence problem","authors":"Sergey Georgievich Chefranov","doi":"10.1080/17455030.2022.2081738","DOIUrl":"https://doi.org/10.1080/17455030.2022.2081738","url":null,"abstract":"ABSTRACTThe paper presents a review of the results that allowed us to find an exact analytical solution to the main problem of the turbulence theory consisting in a closed description of any moments and spectra of all random fields that are described by the Euler hydrodynamic equations for a compressible medium. This solution is based on an exact and explicit analytical solution to n-dimensional Euler equations in the limit of large Mach numbers (S. G. Chefranov, 1991). Based on the Dirac delta function theory, this solution gives an n-dimensional generalization of the well-known implicit Riemann (1860) solution to the one-dimensional Euler equations. In the one-dimensional case, the resulting solution exactly coincides with the explicit form of the Riemann solution for an arbitrary Mach numbers. We have obtained for the first time the exact value of the universal scaling exponent -2/3 for a spectrum of the turbulence energy dissipation rate corresponds to the exact analytical solution to fourth-order two-point moments of the velocity field gradient. We have noted a good agreement between this value and the observational data of turbulence intermittency in the surface atmosphere layer (M. Z. Kholmyansky, 1972) and with the findings of the well-known turbulence intermittency model by Novikov-Stewart (1964).KEYWORDS: Fluid flowRiemann waveturbulencecompressibilityviscosity AcknowledgmentsThe author dedicate this paper to the memory of Valerian Il’ich Tatarskii (October 13, 1929–April 19, 2020), an outstanding man and science researcher. The author sincerely grateful to Valerian Il’ich for his care. I express my kind gratitude to Ya. G. Sinai for a detailed and friendly discussion at his seminar in Moscow on July 9, 2019 and further support of the works presented in this article. The author also grateful for the similar support and interest in the work to G. S. Golitsyn, L. P. Pitaevskii and U. Frisch. I thank E. A. Novikov, L. A. Ostrovsky and I. Procaccia for attention to the work and useful discussions, as well as M. Kholmyansky, V. Yakhot and S.N. Gurbatov for the articles sent and their analysis.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementData available within the article or its supplementary materials.Additional informationFundingThe study was supported by the Russian Science Foundation [grant number 14-17-00806P] and by Israel Science Foundation [grant number 492/18].","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"76 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135975922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-11-02DOI: 10.1080/17455030.2022.2130470
Yu Mao Wu, Ya-Qiu Jin
AbstractIn this review work, we give a review of recent works of high-frequency electromagnetic (EM) wave scattering in complex media and structures. The EM wave scattering from electrically large scatterers remains an important and challenging problem. We introduce the quadratic patches to discretize the electrically large scatterers and present the fast physical optics (FPO) method to solve the PO radiation integral. The computational workload and accuracies of the physical optics (PO) scattered fields from the quadratic patches are error-controllable and frequency-independent, respectively. To remedy the limitations of the accuracies of the PO scattered fields in the lit region of the electrically large scatterers, we consider the Fock current from the convex scatterers to cover the contributions of creeping wave fields in the shadow region. For the coated material from the perfectly conducting structure, we propose the multi-level technique together with the PO method to calculate the scattered field in an efficient way. In the process of mesh discretization for electrically large scatterers, we adopt the quadratic patches and further extend them to adaptive patches. For the multi-scale scatterers, we use the hybrid method of moment and FPO (MoM-FPO) method to calculate the scattered field from the multi-scale scatterers.Keywords: Electrically large scatterersphysical opticsFock currentquadratic patchesadaptive meshmulti-level fast physical optics methodhybrid MoM-PO method Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"The fast methods of high-frequency wave scattering in complex media and structures","authors":"Yu Mao Wu, Ya-Qiu Jin","doi":"10.1080/17455030.2022.2130470","DOIUrl":"https://doi.org/10.1080/17455030.2022.2130470","url":null,"abstract":"AbstractIn this review work, we give a review of recent works of high-frequency electromagnetic (EM) wave scattering in complex media and structures. The EM wave scattering from electrically large scatterers remains an important and challenging problem. We introduce the quadratic patches to discretize the electrically large scatterers and present the fast physical optics (FPO) method to solve the PO radiation integral. The computational workload and accuracies of the physical optics (PO) scattered fields from the quadratic patches are error-controllable and frequency-independent, respectively. To remedy the limitations of the accuracies of the PO scattered fields in the lit region of the electrically large scatterers, we consider the Fock current from the convex scatterers to cover the contributions of creeping wave fields in the shadow region. For the coated material from the perfectly conducting structure, we propose the multi-level technique together with the PO method to calculate the scattered field in an efficient way. In the process of mesh discretization for electrically large scatterers, we adopt the quadratic patches and further extend them to adaptive patches. For the multi-scale scatterers, we use the hybrid method of moment and FPO (MoM-FPO) method to calculate the scattered field from the multi-scale scatterers.Keywords: Electrically large scatterersphysical opticsFock currentquadratic patchesadaptive meshmulti-level fast physical optics methodhybrid MoM-PO method Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"75 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135975928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-10-31DOI: 10.1080/17455030.2023.2265506
Talat Körpinar, Zeliha Körpinar
AbstractThis manuscript examines the effect of optical Sn-microfluidic mKdV model for electromotive force of Sn-magnetic mKdV fiber in spherical space. Then we find Heisenberg ferromagnetical Sn-microfluidic mKdV magnetical optical flux density. Also, we construct spherical Sn-microfluidic flexible mKdV magnetical flux fluid shape. Moreover, we obtain Heisenberg ferromagnetical Sn-microfluidic mKdV model for magnetical flux. Finally, we present Heisenberg ferromagnetical spherical Sn-microfluidic mKdV model for electromotive force.Keywords: Optical framemicrofluidic mKdV modelmKdV electromotive forceflux fluid shapemKdV flux density Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Optical complex media for ferromagnetic spherical microfluidic optical mKdV magnetic flux density","authors":"Talat Körpinar, Zeliha Körpinar","doi":"10.1080/17455030.2023.2265506","DOIUrl":"https://doi.org/10.1080/17455030.2023.2265506","url":null,"abstract":"AbstractThis manuscript examines the effect of optical Sn-microfluidic mKdV model for electromotive force of Sn-magnetic mKdV fiber in spherical space. Then we find Heisenberg ferromagnetical Sn-microfluidic mKdV magnetical optical flux density. Also, we construct spherical Sn-microfluidic flexible mKdV magnetical flux fluid shape. Moreover, we obtain Heisenberg ferromagnetical Sn-microfluidic mKdV model for magnetical flux. Finally, we present Heisenberg ferromagnetical spherical Sn-microfluidic mKdV model for electromotive force.Keywords: Optical framemicrofluidic mKdV modelmKdV electromotive forceflux fluid shapemKdV flux density Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"17 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135813481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-10-27DOI: 10.1080/17455030.2023.2273323
Lalit Mohan, Amit Prakash
AbstractIn this paper, we consider the time-fractional non-linear diffusion equations for describing the pollution caused by oil in the water. The hybrid computational technique, the Natural Transform Homotopy Perturbation Technique is applied to get a numerical solution to the time-fractional non-linear diffusion equation. The existence and uniqueness are analyzed with the help of the fixed point theorem, also the stability analysis is discussed by using the Lyapunov function.KEYWORDS: Fractional diffusion equationCaputo derivativeLyapunov functionnatural transformhomotopy perturbation transform techniquefixed point theorem Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"An efficient technique for solving fractional diffusion equations arising in oil pollution via natural transform","authors":"Lalit Mohan, Amit Prakash","doi":"10.1080/17455030.2023.2273323","DOIUrl":"https://doi.org/10.1080/17455030.2023.2273323","url":null,"abstract":"AbstractIn this paper, we consider the time-fractional non-linear diffusion equations for describing the pollution caused by oil in the water. The hybrid computational technique, the Natural Transform Homotopy Perturbation Technique is applied to get a numerical solution to the time-fractional non-linear diffusion equation. The existence and uniqueness are analyzed with the help of the fixed point theorem, also the stability analysis is discussed by using the Lyapunov function.KEYWORDS: Fractional diffusion equationCaputo derivativeLyapunov functionnatural transformhomotopy perturbation transform techniquefixed point theorem Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136261639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-10-27DOI: 10.1080/17455030.2023.2266029
Talat Körpinar, Zeliha Körpinar, Ahmet Sazak
AbstractIn this study, we analyze the electromagnetic parameters and associated geometric phases of a magnetic particle moving in pseudo-hyperbolic space associated with Minkowski 3-space. To do this, we make use of curves representing the trajectories of electromagnetic waves, the electric and the magnetic field equations, and in particular the Heisenberg equations (ferromagnetic spin chain) that serve spin wave theory. First of all, we obtain the Lorentz forces and magnetic fields of these magnetic particles, which we call pseudo-hyperbolic (p-hyperbolic) magnetic particles. Next, we calculate electric fields and power flows with the help of the equation relating Lorentz and Newtonian forces. We then characterize some geometric phases of these power flows, which give data on energy density and magnitude. Finally, we characterize the geometric phases of a power flow in a ferromagnetic media with the help of the ferromagnetic Heisenberg model. We also give simulations of Heisenberg ferromagnetic power flows, including observations of the results obtained at the end of this section.Keywords: Spin wave theoryelectromagnetismenergy densityferromagnetic modelgeometric phaseEinstein universeMATHEMATICS SUBJECT CLASSIFICATIONS: 53A0476B4734A34PACS: 03.50.De04.20.-q02.40.-k Disclosure statementNo potential conflict of interest was reported by the author(s).Ethical ApprovalThis paper does not require ethical approval or any special approval.Availability of data and materialsData set sharing is not applicable for this paper, as there is no data set created or analyzed during the paper.
{"title":"Geometric phases for pseudo-hyperbolic magnetic particles with ferromagnetic media","authors":"Talat Körpinar, Zeliha Körpinar, Ahmet Sazak","doi":"10.1080/17455030.2023.2266029","DOIUrl":"https://doi.org/10.1080/17455030.2023.2266029","url":null,"abstract":"AbstractIn this study, we analyze the electromagnetic parameters and associated geometric phases of a magnetic particle moving in pseudo-hyperbolic space associated with Minkowski 3-space. To do this, we make use of curves representing the trajectories of electromagnetic waves, the electric and the magnetic field equations, and in particular the Heisenberg equations (ferromagnetic spin chain) that serve spin wave theory. First of all, we obtain the Lorentz forces and magnetic fields of these magnetic particles, which we call pseudo-hyperbolic (p-hyperbolic) magnetic particles. Next, we calculate electric fields and power flows with the help of the equation relating Lorentz and Newtonian forces. We then characterize some geometric phases of these power flows, which give data on energy density and magnitude. Finally, we characterize the geometric phases of a power flow in a ferromagnetic media with the help of the ferromagnetic Heisenberg model. We also give simulations of Heisenberg ferromagnetic power flows, including observations of the results obtained at the end of this section.Keywords: Spin wave theoryelectromagnetismenergy densityferromagnetic modelgeometric phaseEinstein universeMATHEMATICS SUBJECT CLASSIFICATIONS: 53A0476B4734A34PACS: 03.50.De04.20.-q02.40.-k Disclosure statementNo potential conflict of interest was reported by the author(s).Ethical ApprovalThis paper does not require ethical approval or any special approval.Availability of data and materialsData set sharing is not applicable for this paper, as there is no data set created or analyzed during the paper.","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"11 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136262767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-10-27DOI: 10.1080/17455030.2023.2273308
Evgenii Starodubtsev
ABSTRACTConditions of the excitation of backward electromagnetic waves and negative refraction in absorbing bi-isotropic layered media and metamaterials are investigated. Based on the exact analytical model, the features determined by absorption and inhomogeneity of the waves and possible metamaterial properties of the medium are ascertained. It is shown that only simultaneous realization of backward, backward with respect to the boundary between two media, and negative refraction is possible for each of the proper waves in a bi-isotropic layer. The conditions are obtained when two (one transmitted and one reflected waves) or all the four proper waves in the layer are backward and characterized by negative refraction on boundaries. Taking into account the calculation of Pointing’s vector and energy dissipation of the waves, it is shown that the well-known limitations on the chirality and nonreciprocity parameters require a clarification for the considered media.KEYWORDS: Bi-isotropic metamaterialsbackward wavesnegative refraction Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Features of backward waves and negative refraction in absorbing bi-isotropic media and metamaterials","authors":"Evgenii Starodubtsev","doi":"10.1080/17455030.2023.2273308","DOIUrl":"https://doi.org/10.1080/17455030.2023.2273308","url":null,"abstract":"ABSTRACTConditions of the excitation of backward electromagnetic waves and negative refraction in absorbing bi-isotropic layered media and metamaterials are investigated. Based on the exact analytical model, the features determined by absorption and inhomogeneity of the waves and possible metamaterial properties of the medium are ascertained. It is shown that only simultaneous realization of backward, backward with respect to the boundary between two media, and negative refraction is possible for each of the proper waves in a bi-isotropic layer. The conditions are obtained when two (one transmitted and one reflected waves) or all the four proper waves in the layer are backward and characterized by negative refraction on boundaries. Taking into account the calculation of Pointing’s vector and energy dissipation of the waves, it is shown that the well-known limitations on the chirality and nonreciprocity parameters require a clarification for the considered media.KEYWORDS: Bi-isotropic metamaterialsbackward wavesnegative refraction Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"128 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136262646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-10-19DOI: 10.1080/17455030.2023.2271573
M. S. Afify, N. S. Alharthi, R. E. Tolba, M. E. Yahia
AbstractThe dynamics of dust acoustic waves (DAWs) in a collision-magnetized dusty plasma are still unclear. To achieve this, we investigate the dynamics of a plasma system consisting of Boltzmann-distributed electrons and ions, and fluid-negative dust particles. The generalized hydrodynamic model of coupled particles is reduced using conventional reductive perturbation theory to a single evolution equation known as the complex Ginzburg-Landau (CGL) equation. Our results show that the energy of rogue waves (RW) is increased by high-energy electrons and decreased by high-energy ions for small polarization parameter. We also observed that the energy of rogue waves increased with decreasing the polarization parameter and the gravitational force coefficient, while increasing dust grain concentration enhances the wave energy. The application of this study to dusty magnetoplasma in space and laboratory plasmas is pointed out.KEYWORDS: Radiation pressurenonlinear dust acoustic rogue waves (DARW)shock-like wavebrigth soliton wave AcknowledgmentsM. S. Afify thanks Prof. Dr. M. E. Innocenti at Ruhr-Universität Bochum for her hospitality and support. The authors appreciate the anonymous referees' insightful criticism, which helped improve the text.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingM. S. Afify would like to thank the Alexander-von-Humboldt Research Fellowship (Bonn, Germany) for its financial support.
{"title":"Dust acoustic waves potentially originate in a self-gravitating magnetized dusty plasma","authors":"M. S. Afify, N. S. Alharthi, R. E. Tolba, M. E. Yahia","doi":"10.1080/17455030.2023.2271573","DOIUrl":"https://doi.org/10.1080/17455030.2023.2271573","url":null,"abstract":"AbstractThe dynamics of dust acoustic waves (DAWs) in a collision-magnetized dusty plasma are still unclear. To achieve this, we investigate the dynamics of a plasma system consisting of Boltzmann-distributed electrons and ions, and fluid-negative dust particles. The generalized hydrodynamic model of coupled particles is reduced using conventional reductive perturbation theory to a single evolution equation known as the complex Ginzburg-Landau (CGL) equation. Our results show that the energy of rogue waves (RW) is increased by high-energy electrons and decreased by high-energy ions for small polarization parameter. We also observed that the energy of rogue waves increased with decreasing the polarization parameter and the gravitational force coefficient, while increasing dust grain concentration enhances the wave energy. The application of this study to dusty magnetoplasma in space and laboratory plasmas is pointed out.KEYWORDS: Radiation pressurenonlinear dust acoustic rogue waves (DARW)shock-like wavebrigth soliton wave AcknowledgmentsM. S. Afify thanks Prof. Dr. M. E. Innocenti at Ruhr-Universität Bochum for her hospitality and support. The authors appreciate the anonymous referees' insightful criticism, which helped improve the text.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingM. S. Afify would like to thank the Alexander-von-Humboldt Research Fellowship (Bonn, Germany) for its financial support.","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135730709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-10-17DOI: 10.1080/17455030.2023.2268754
S. Shabani, T. Mohsenpour, A. Ghadi
AbstractThe present study presents a kinetic theory approach to second-harmonic generation (SHG) through high-power laser in collisionless plasma with nonextensively-distributed electrons. The study applied a relativistic Vlasov equation to obtain nonlinear current density and second-harmonic (SH) conversion efficiency. It was observed that the power conversion efficiency (PCE) of second-harmonic generation depends on plasma and laser parameters such as dimensionless cyclotron frequency, plasma density, normalized thermal velocity, the nonextensive q-parameter, and laser intensity. Moreover, cyclotron frequency associated with plasma electrons has been found to play an important role in increasing the power conversion efficiency of SH generation.KEYWORDS: Kinetic theorySelf-focusingSH generationVlasov equationPower conversion efficiency Disclosure statementNo potential conflict of interest was reported by the author(s).
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Pub Date : 2023-10-17DOI: 10.1080/17455030.2023.2266044
Z. Khalili, M. Sheikholeslami
AbstractThe laminar flow of ZrO2-water nanomaterial through the cooling duct of photovoltaic unit has been analyzed in this article. Two shapes for the ducts (circular and rectangular) were considered. The system with a rectangular duct has been equipped with confined jets with two arrangements. The finite volume method has been utilized for the simulation of the present three-dimensional models and a good agreement has been obtained. The uniformity of isotherms over the silicon layer has been improved by utilizing the new cooling system which leads to a longer lifetime. For the circular tube case, an increase in inlet velocity (Vin) makes electrical (ηe) and thermal (ηth) performances enhance about 1.07% and 1.64%, respectively. With the increase in inlet temperature (Tin) in both regions, ηe and ηth reduced by about 3.97% and 28.39%. Incorporating the rectangular duct and jets with proper design leads to increments of ηth and ηeabout 58.91% and 3.84% when Tin = 308.15 K, Vin = 0.06 m/s.KEYWORDS: Photovoltaic systemconfined jetszirconium oxide nanofluidrectangular tubeelectrical performance Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Investigation of photovoltaic solar cell with the complex cooling system","authors":"Z. Khalili, M. Sheikholeslami","doi":"10.1080/17455030.2023.2266044","DOIUrl":"https://doi.org/10.1080/17455030.2023.2266044","url":null,"abstract":"AbstractThe laminar flow of ZrO2-water nanomaterial through the cooling duct of photovoltaic unit has been analyzed in this article. Two shapes for the ducts (circular and rectangular) were considered. The system with a rectangular duct has been equipped with confined jets with two arrangements. The finite volume method has been utilized for the simulation of the present three-dimensional models and a good agreement has been obtained. The uniformity of isotherms over the silicon layer has been improved by utilizing the new cooling system which leads to a longer lifetime. For the circular tube case, an increase in inlet velocity (Vin) makes electrical (ηe) and thermal (ηth) performances enhance about 1.07% and 1.64%, respectively. With the increase in inlet temperature (Tin) in both regions, ηe and ηth reduced by about 3.97% and 28.39%. Incorporating the rectangular duct and jets with proper design leads to increments of ηth and ηeabout 58.91% and 3.84% when Tin = 308.15 K, Vin = 0.06 m/s.KEYWORDS: Photovoltaic systemconfined jetszirconium oxide nanofluidrectangular tubeelectrical performance Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":23598,"journal":{"name":"Waves in Random and Complex Media","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135995007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
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