The Open Plasma Physics Journal最新文献

Large Amplitude Dust-acoustic Solitons in a Plasma Consisting of SuperthermalElectron-positron Pairs and Dust Particulates 由超热电子-正电子对和尘埃粒子组成的等离子体中的大振幅尘声孤子

The Open Plasma Physics Journal Pub Date : 2015-01-30 DOI: 10.2174/1876534301508010008

E. Saberian, A. Esfandyari-Kalejahi, M. Afsari-Ghazi

引用次数: 7

Echo in a Semi-Bounded Plasma 半有界等离子体中的回波

The Open Plasma Physics Journal Pub Date : 2015-01-20 DOI: 10.2174/1876534301508010001

Hee-Jae Lee, Myoung-Jae Lee

引用次数: 1

Self-Consistent Hot Spot Tracing in Kinetic Simulations: A Method to Improve the Test Particles Method 动力学模拟中的自洽热点追踪:一种改进测试粒子法的方法

The Open Plasma Physics Journal Pub Date : 2014-07-11 DOI: 10.2174/1876534301407010194

A. Esmaeili

引用次数: 0

Some Aspects of the Shock Wave in Pair Plasma 对等离子体中激波的几个方面

The Open Plasma Physics Journal Pub Date : 2014-07-11 DOI: 10.2174/1876534301407010199

B. Malekolkalami, Taimur Mohammadi

引用次数: 3

Role of State-to-State Kinetics in Determining Transport Coefficients for Hypersonic Flow Simulations 状态-状态动力学在确定高超声速流动模拟输运系数中的作用

The Open Plasma Physics Journal Pub Date : 2014-06-27 DOI: 10.2174/18765343014070101173

E. Josyula, J. M. Burt, W. Bailey, P. Vedula

{"title":"Role of State-to-State Kinetics in Determining Transport Coefficients for Hypersonic Flow Simulations","authors":"E. Josyula, J. M. Burt, W. Bailey, P. Vedula","doi":"10.2174/18765343014070101173","DOIUrl":"https://doi.org/10.2174/18765343014070101173","url":null,"abstract":"A numerical study is performed to assess the influence of thermochemical nonequilibrium on the transport coefficients used in Computational Fluid Dynamics (CFD) simulations of hypersonic external flowfields. An quantitative assessment is made of transport coefficients from simplified methods of Blottner curve fits and Variable Hard Sphere (VHS) model on the numerical solution of a Mach 23 flow past a sphere cone, the RAMC-II test case. The equations derived by Kustova (1) in the state kinetic approach for calculating transport coefficients from the Chapman-Enskog solution of the Wang-Chang Uhlenbeck equation were used to conduct a parametric study for assessment of the effect of the following parameters on the state-specific diffusion coefficients: (1) Widely different population distributions, (2) Atomic mass concentration, and (3) Binary atomic to molecular diffusion coefficient ratio. The present study is a first step to quantify the relative importance of the parameters considered for a future implementation of the computationally expensive state-kinetic transport coefficients in multi-dimensional fluid dynamic flow solvers for flow conditions where the more general state kinetic approach becomes necessary.","PeriodicalId":231555,"journal":{"name":"The Open Plasma Physics Journal","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114565598","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: 1

Vibrational-Chemical Kinetics in Mars Entry Problems 火星进入问题中的振动化学动力学

The Open Plasma Physics Journal Pub Date : 2014-06-27 DOI: 10.2174/1876534301407010076

E. Kustova, E. Nagnibeda, I. Armenise

{"title":"Vibrational-Chemical Kinetics in Mars Entry Problems","authors":"E. Kustova, E. Nagnibeda, I. Armenise","doi":"10.2174/1876534301407010076","DOIUrl":"https://doi.org/10.2174/1876534301407010076","url":null,"abstract":"The paper deals with kinetic theory methods modelling of reacting gas flows near spacecrafts entering the Mars atmosphere. For mixtures containing CO2 molecules, the complete kinetic scheme including all vibrational energy transitions, dissociation, recombination and exchange chemical reactions is proposed. For the prediction of gas dynamic parameters and heat transfer to the surface of a spacecraft, a detailed approach taking into account state-to-state CO2 vibrational and chemical kinetics as well as multi-temperature approaches based on quasi-stationary vibrational distributions are used. A more accurate but complicated and time consuming state-to-state model is applied for the numerical simulation of a one-dimensional flow in a boundary layer near the entering body surface. More simple quasi- stationary three-temperature, two-temperature and one-temperature approaches are used for the numerical study of a 2-D viscous shock layer under entry conditions. The vibrational distributions near the surface are far from the local vibrational and chemical equilibrium and a noticeable difference is found between the values of CO2 vibrational-specific energies at the surface obtained by means of the state-to-state and quasi-stationary approaches. At the same time, for all considered approaches, the kinetic model for vibrational distributions and chemical reactions has a weak influence on the heat transfer to the non-catalytic vehicle surface.","PeriodicalId":231555,"journal":{"name":"The Open Plasma Physics Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125393901","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: 26

Reduction of State-to-State to Macroscopic Models for Hypersonics 高超声速状态到宏观模型的化简

The Open Plasma Physics Journal Pub Date : 2014-06-27 DOI: 10.2174/1876534301407010060

A. Bourdon, J. Annaloro, A. Bultel, M. Capitelli, G. Colonna, A. Guy, T. Magin, A. Munafò, M. Perrin, L. Pietanza

{"title":"Reduction of State-to-State to Macroscopic Models for Hypersonics","authors":"A. Bourdon, J. Annaloro, A. Bultel, M. Capitelli, G. Colonna, A. Guy, T. Magin, A. Munafò, M. Perrin, L. Pietanza","doi":"10.2174/1876534301407010060","DOIUrl":"https://doi.org/10.2174/1876534301407010060","url":null,"abstract":"Four different types of macroscopic models developed for the vibration-chemistry coupling in nonequilibrium flows for re-entry applications are presented. First, using an approach based on nonequilibrium thermodynamics, global rate coefficients of dissociation of N2 and O2 under parent molecular or atomic impact and backward molecular recombination are determined. Then a Two-Level Distribution (TLD) model is developed, in which a relaxation equation for vibrational temperature is solved as in the case of multi-temperature models but with the simultaneous solution of a kinetic equation, as in the case of state-to-state models, but only for the last vibrational level. In a third approach, a multi- internal temperature model is presented to describe accurately the vibrational distribution function in using several groups of levels, within which the levels are assumed to follow a Boltzmann distribution at an internal temperature of the group. This multi-internal temperature model allows us to describe accurately the vibrational energy relaxation and dissociation processes behind a strong shock wave. Finally, a rovibrational collisional coarse-grain model is developed to reduce a detailed rovibrational mechanism for the internal energy excitation and dissociation processes behind a strong shock wave in a nitrogen flow.","PeriodicalId":231555,"journal":{"name":"The Open Plasma Physics Journal","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124926469","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: 10

Different Approximation Levels in Using CFD for the Design of Hypersonic Vehicles 高超声速飞行器CFD设计中的不同近似水平

The Open Plasma Physics Journal Pub Date : 2014-06-27 DOI: 10.2174/18765343014070101181

A. Schettino, D. D’Ambrosio

引用次数: 1

Radiative Aerothermodynamics of Entering Space Vehicles: Toward the Use of State-to-State Approach 进入空间飞行器的辐射空气热力学:走向使用国对国方法

The Open Plasma Physics Journal Pub Date : 2014-06-27 DOI: 10.2174/18765343014070101127

S. Surzhikov, P. Reynier, G. Seller, F. Taccogna

{"title":"Radiative Aerothermodynamics of Entering Space Vehicles: Toward the Use of State-to-State Approach","authors":"S. Surzhikov, P. Reynier, G. Seller, F. Taccogna","doi":"10.2174/18765343014070101127","DOIUrl":"https://doi.org/10.2174/18765343014070101127","url":null,"abstract":"Modern problems of radiative aerothermodynamics of entering space vehicles are demonstrated and analyzed in the paper. New radiative gas dynamic problems concerned to coupling processes of non-equilibrium dissociation with radiation heat transfer in shock layers generated above large scale re-entry space vehicles returning from orbital and super orbital space mission are considered in the first part. Three-dimensional numerical simulation data on radiative aerothermodynamics of Martian entry probes Pathfinder, Exomars and Mars Science Laboratory (MSL) are presented and analyzed in the second part. It is shown that integral radiative heating of leeward surface of the entry probes exceeds corresponding convective heating. The third part is dedicated to consideration preliminary numerical simulation results on radiative gas dynamics of Galileo probes. At first, a review of the available results obtained during the mission preparation and post-flight analyses has been undertaken to select a computational matrix. This matrix has been selected by accounting for previous numerical efforts from the literature to crosscheck the results. Then, a model based on previous efforts has been set up for computing the flow-field around the probe at high altitude. Finally the test case matrix has been computed and crosschecked with existing numerical predictions performed. Some possibilities of innovative magneto-hydrodynamic (MHD) technologies being applied to solve problems of re-entry vehicles heat protection are discussed in the fourth part. All presented data demonstrate necessity of further development of the radiative aerothermodynamics based on state-to- state approaches.","PeriodicalId":231555,"journal":{"name":"The Open Plasma Physics Journal","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117204714","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: 4

Advanced Models in Shock Waves 激波中的先进模型

The Open Plasma Physics Journal Pub Date : 2014-06-27 DOI: 10.2174/1876534301407010100

G. Colonna, G. D. Ammando, A. Dikalyuk, M. Panesi, L. Pietanza, S. Surzhikov

{"title":"Advanced Models in Shock Waves","authors":"G. Colonna, G. D. Ammando, A. Dikalyuk, M. Panesi, L. Pietanza, S. Surzhikov","doi":"10.2174/1876534301407010100","DOIUrl":"https://doi.org/10.2174/1876534301407010100","url":null,"abstract":"The paper presents three collisional-radiative models developed to investigate non-equilibrium chemistry and radiation in hypersonic shock tubes operating with different planetary atmospheres. An hybrid collisional-radiative model, employing the state-to-state kinetics of electronically excited states of molecules and the multi-temperature approximation for the vibrational degree of freedom is presented first, and applied to the numerical rebuilding of experimental shock tube emission spectra. Next, an hybrid collisional-radiative model for ionized air is presented. This model consider the state-to- state approach for electronic states of atoms and the multi-temperature model for the vibrational populations of diatomic molecules in their ground electronic state. A radiative transport equation is also solved to determine radiative source terms in the kinetic scheme and the enthalpy production due to radiation. The third model considers the state-to-state collisional- radiative model of Jupiter's atmosphere, self-consistently coupled with the Boltzmann equation for free electrons and the radiative transfer equation for the radiation transport in one-dimensional slab geometry.","PeriodicalId":231555,"journal":{"name":"The Open Plasma Physics Journal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134330233","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: 4