Interfacial Phenomena and Heat Transfer最新文献

{"title":"VACUUM PROCESSING OF GOLD-BEARING CLAY MATERIALS","authors":"A. Fedoseev, G. Sukhinin, I. Yarygin, V. Prikhodko, S. Novopashin","doi":"10.1615/interfacphenomheattransfer.2019030520","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019030520","url":null,"abstract":"The influence of vacuum on a spherical clay sample is investigated via numerical simulation and experiment. The temporal and radial dependences of the temperature and mass of these samples were measured in the vacuum drying process. The numerical model in which the measurements were conducted calculates the moisture and heat transfer equations, where the effective coefficients of thermal conductivity and diffusion were set equal to the coefficients of a moist porous medium. Calculations were performed for various initial and boundary conditions. The data obtained on the temperature and moisture content distributions had sufficient deviations from the experimental data; however, both described important qualitative distribution features. The results of the current paper will help in determining the conditions of effective clay disintegration, which will facilitate the extraction of gold from gold-bearing clays.","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74747889","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}

{"title":"PREFACE TO SPECIAL ISSUE MULTIPHASE FLOWS AND HEAT/MASS TRANSFER","authors":"T. Lyubimova, O. Goncharova, A. Kupershtokh","doi":"10.1615/interfacphenomheattransfer.2020033359","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2020033359","url":null,"abstract":"This issue is devoted to the problems of Multiphase Flows and Heat/Mass Transfer. Three papers included in this issue concern the theoretical investigations on the behavior of n onu iform hydrodynamical systems under the action of time-dependent external fields. The effects of pulsating pr essure field, external mechanical vibrations, and alternat ing electric field are discussed. In the paper by A.A. Alabuzhev, the dynamics of a cylindrical g seous bubble surrounded by a coaxial layer of incompressible fluid of different density and bounded in t he axial direction by parallel rigid plates with different properties are studied. The system is subjected to the pulsa ting pressure field. Velocity of three-phase contact line motion is assumed to be proportional to the contact angle dev iations. It is shown that, in some parameter ranges, the frequency of volume oscillations can be close to zero. If thi s frequency is close to one of the frequencies of shape oscillations, then a double resonance response is observed that leads the unlimited growth of oscillation amplitude independently of the coefficient of eigen-oscillation damp ing. E.S. Sadilov discusses the effect of normal vibrations on th e stability of a three-layer system of fluids in zero gravity conditions. It is found that, when the ratio of exter nal layer thicknesses tends to unity the critical vibration amplitude for subharmonic instability mode tends to infinit y, which means the disappearance of subharmonic instability mode for the external layers of equal thicknesses. Synch ronous instability mode exists at any ratio of the external layer thicknesses. The work “Electroconvection Instability of Poorly Conduct ing Fluid in Alternating Electric Field,” by N.N. Kartavykh and O.O. Nekrasov, deals with the study of a flat horizo ntal layer of a poorly conducting fluid subjected to the alternating electric field and heating from above. The el ectroconductive instability mechanism is analyzed. On the basis of the linear analysis, a map of the stability of a condu ctive state of nonuniformly poorly heated conducting fluid is plotted and the dependence of the critical wave numbers on the electric field frequency is obtained. Quasiperiodic, synchronous, and chaotic oscillation regimes are found as a re ult of the nonlinear system dynamics analysis. The domains of coexistence of oscillatory modes with different intensities of flows are found. In the work “Investigation of the Isothermal Rheokinetic Po lymerization of the Epoxy Oligomer,” by V.G. Gilev, V.S. Chudinov, S.V. Rusakov, and A.V. Kondyurin, an experim ental study and numerical simulations of the kinetics of polymerization of the epoxy oligomer were carried out. Nume rical analysis of the kinetic dependencies of viscosity allows one to estimate the reaction rate constants of the pol ymerization process, which makes it possible to predict the properties of the polymer during its formation. It is shown t hat the results of viscosity measur","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72641005","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}

{"title":"THE USE OF MOLYBDENUM ACTIVATOR FOR DEPOSITION OF FLUOROPOLYMER COATINGS WITH DIFFERENT STRUCTURES BY THE HOT WIRE CHEMICAL VAPOR DEPOSITION METHOD","authors":"A. Safonov, N. Timoshenko, D. Panin","doi":"10.1615/interfacphenomheattransfer.2019030489","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019030489","url":null,"abstract":"THE USE OF MOLYBDENUM ACTIVATOR FOR DEPOSITION OF FLUOROPOLYMER COATINGS WITH DIFFERENT STRUCTURES BY THE HOT WIRE CHEMICAL VAPOR DEPOSITION METHOD Alexey I. Safonov,1,2,∗ Denis Y. Panin,1 & Nikolay I. Timoshenko1 1Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Lavrentyev Ave. 1, 630090, Novosibirsk, Russia 2Novosibirsk State University, Pirogova Str. 2, 630090, Novosibirsk, Russia","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81512826","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}

{"title":"HEAT FLUX DURING DIP-COATING OF A SUPERHEATED SUBSTRATE","authors":"Kai Schweikert, A. Sielaff, P. Stephan","doi":"10.1615/interfacphenomheattransfer.2019032623","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019032623","url":null,"abstract":"We report transient heat flux calculations based on temperature measurements during dip-coating of a superheated substrate. During the withdrawal of the substrate from a pool of volatile liquid, a film of finite length forms on the substrate’s surface, locally reducing the substrate temperature due to evaporation. The surface temperature of the solid substrate is measured using high-resolution infrared thermography and used as a boundary condition to calculate the transient heat flux profiles at the interface between the superheated substrate and the fluid. The shapes of these heat flux profiles are analyzed with special focus on the local heat flux in the thin film region and near the three-phase contact line. It is shown how the heat flux in both regions is dependent on wall superheat and dewetting velocity. Two evaporation regimes, namely contact line evaporation and microlayer evaporation, can be clearly distinguished by their magnitude in overall heat flux. A temperature-dependent critical velocity separates both regimes. The local heat flux in the contact line region sharply increases, when the critical velocity is exceeded. Within the thin film, the local heat flux increases with growing wall superheat and decreases with growing dewetting velocity.","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85599286","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}

{"title":"SURFACE STRUCTURING OF KAPTON POLYIMIDE WITH FEMTOSECOND AND PICOSECOND IR LASER PULSES","authors":"J. Hrabovský, C. Liberatore, I. Mirza, J. Sládek, J. Beranek, A. Bulgakov, N. Bulgakova","doi":"10.1615/interfacphenomheattransfer.2019031067","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019031067","url":null,"abstract":"Jan Hrabovsky, Chiara Liberatore, Inam Mirza, Juraj Sladek, Jiri Beranek, Alexander V. Bulgakov, & Nadezhda M. Bulgakova HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, 28, 252 41 Dolní Břežany, Czech Republic Faculty of Chemical Technology, University of Pardubice, Studentská 95, Pardubice, Czech Republic Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 2027/3, 121 16 Prague Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Trojanova 13, 120 00 Prague, Czech Republic S.S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, 1 Lavrentyev Ave., Novosibirsk, 630090, Russia","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73497374","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}

{"title":"THE EFFECT OF NORMAL VIBRATIONS ON THE STABILITY OF A THREE-LAYER FLUID SYSTEM IN ZERO GRAVITY","authors":"E. Sadilov","doi":"10.1615/interfacphenomheattransfer.2019030977","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019030977","url":null,"abstract":"","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74219989","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}

{"title":"INFLUENCE OF HEAT DEFECT ON THE CHARACTERISTICS OF A TWO-LAYER FLOW WITH THE HIEMENZ-TYPE VELOCITY","authors":"V. Bekezhanova, V. Andreev, I. A. Shefer","doi":"10.1615/interfacphenomheattransfer.2020032777","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2020032777","url":null,"abstract":"An exact solution is derived in the frame of the creeping flow model to describe thermocapillary convection in a twolayer system with heat defect when the heat is transferred through the interface. The solution is characterized by the Hiemenz-type velocity and temperature distribution which is quadratic in the longitudinal coordinate. The heat defect is connected with changes in the internal energy of the interface caused by the action of thermocapillary forces on the transformation of the area and shape of the surface. A model linear problem is studied to estimate the impact of this effect on the formation of typical flow regimes and stability of these regimes. There is only a nonlinear term in the energy balance condition at the interface corresponding to the heat defect in the model problem. Depending on the values of a parameter defining the character of thermal load on the lower boundary of the system this problem may not have any solution, or it may have one or two exact solutions obtained in an explicit form. In the frame of the linear theory the stability of one of these exact solutions is investigated both taking into account the heat defect and under classical condition of heat balance at the interface setting an equality of heat fluxes on this surface. The interface position and velocity and temperature perturbation fields are calculated. With the decrease of the liquid layer thickness the changes in the internal energy of the interface can result in oscillations of the surface and saw-shaped deformations. Such behavior of the interface does not appear in the system without the heat defect.","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74387324","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}

{"title":"COMPARISON ON BUBBLE DEFORMATION AND INFLUENCE ON WALL SHEAR STRESS IN SIMPLE SHEAR FLOW BETWEEN TWO- AND THREE-DIMENSIONAL COMPUTATIONS","authors":"Rui Niu, Ming Pang","doi":"10.1615/interfacphenomheattransfer.2019030134","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019030134","url":null,"abstract":"Bubbly suspensions widely exist in many industrial fields, and thus it is very important to deeply investigate the physical properties of bubbly suspensions for the design and improvement of industrial products. In the present investigations on bubbly suspensions, twoand three-dimensional numerical simulations were performed, in which the obtained results showed some differences. To obtain an accurate and reasonable understanding of physical phenomena, it is necessary to clarify the similarities and differences of the computational results between twoand three-dimensional computations. Therefore, twoand three-dimensional computations are simultaneously carried out in order to study the behavior of a single bubble suspended in a Newtonian fluid under simple shear using the volume of fluid method. The trends of bubble deformation and influence on wall shear stress are analyzed in detail. The present study shows that the difference between the twoand three-dimensional computational results is related to the capillary number (Ca). When Ca ≤ 0.6, the computational results, including the bubble deformation and influence on the wall stress, are similar in the two kinds of computations; however, when Ca > 0.6, the results of the twoand three-dimensional computations show great differences. In the two-dimensional simulation, when the capillary number is relatively large, the bubble stretches and rocks, leading to unstable deformation. Correspondingly, the wall shear stress fluctuates with the bubble deformation. In the three-dimensional simulation, tip streaming occurs in the bubble. However, the wall shear stress remains stable after tip streaming appears.","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79302846","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}

{"title":"SPECTROPHOTOMETRY TECHNIQUE FOR DROPLET PHASE SPATIAL DISTRIBUTION MEASUREMENTS IN GAS-DROPLET FLOW BEHIND A SUPERSONIC NOZZLE IN A VACUUM","authors":"I. Yarygin, V. Prikhodko, Yu.N. Vyazov","doi":"10.1615/interfacphenomheattransfer.2019031185","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019031185","url":null,"abstract":"","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85937907","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}

{"title":"ELECTROCONVECTION INSTABILITY OF POORLY CONDUCTING FLUID IN ALTERNATING ELECTRIC FIELD","authors":"O. Nekrasov, N. Kartavykh","doi":"10.1615/interfacphenomheattransfer.2019030611","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019030611","url":null,"abstract":"The flat horizontal layer of the poorly conducting fluid is placed in the alternating electric field and heated from above. Its behavior is investigated in the electroconvection low-mode model. The approximation in which density and conductivity of the fluid are linearly dependent on temperature is used. Linear instability is analyzed by means of the Floquet theory. The system of eight differential equations, which describe the motion of the fluid, is integrated using the Runge-Kutta-Merson fourth-order method. The marginal stability curves are plotted in coordinates “wave number – nondimensional electric parameter.” The critical values of the wave number and the nondimensional electric parameter are determined for various external influence frequencies. The nonlinear regimes of the fluid flow are investigated at the critical value of the wave number. The fluid electroconvection flow intensity as a function of the nondimensional electric parameter is plotted. The various types of the oscillation regimes are discovered, and the competition regions of different electroconvection modes with various flow intensities are found.","PeriodicalId":44077,"journal":{"name":"Interfacial Phenomena and Heat Transfer","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82821573","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}