K. V. Lukianov, A. Kotov, A. A. Starostin, P. Skripov
{"title":"HEAT TRANSFER ENHANCEMENT IN SUPERHEATED HYDROCARBONS WITH TRACES OF WATER: THE EFFECT OF PRESSURE","authors":"K. V. Lukianov, A. Kotov, A. A. Starostin, P. Skripov","doi":"10.1615/interfacphenomheattransfer.2020032696","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2020032696","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":"83093319","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":"BEHAVIOR OF A BUBBLE IN DIELECTRIC LIQUID IN UNIFORM AND NON-UNIFORM ELECTRIC FIELDS","authors":"A. A. Nemykina, D. Medvedev","doi":"10.1615/interfacphenomheattransfer.2020032546","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2020032546","url":null,"abstract":"We simulated the behavior of vapor and gas–vapor bubbles in dielectric liquid under the action of an electric field. The thermal multiphase lattice Boltzmann method was used to calculate the fluid dynamics. After applying the electric voltage, the bubble was deformed. In the uniform field (in which electrodes occupied all of the boundaries), the bubble was elongated along the direction of the average electric field and the degree of deformation was then calculated, which was close to experimentally obtained results. When the electrodes were smaller than the size of the computational domain, the field was non-uniform. The field magnitude was higher between the electrodes and decreased outside of the electrodes. In this case, the bubble was stretched in the direction normal to the electric field due to the forces acting on the inhomogeneous dielectric fluid. Moreover, for sufficiently small electrodes, the bubble escaped outside of the electrodes. This type of interesting behavior has been previously observed in experiments of Korobeynikov et al.","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":"86834174","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":"EFFECTS OF SWIRL ON FLOW PATTERNS AND LIQUID UNLOADING OF GAS–LIQUID TWO-PHASE VERTICAL FLOW UNDER STAGNANT CONDITIONS","authors":"Wen Liu, Xiaofei Lv, B. Bai","doi":"10.1615/INTERFACPHENOMHEATTRANSFER.2019030601","DOIUrl":"https://doi.org/10.1615/INTERFACPHENOMHEATTRANSFER.2019030601","url":null,"abstract":"Liquid loading is a common problem in low-production gas wells faced in many producing regions around the world. Recently, swirl flow has been applied to remove the accumulated liquid. However, the effect of swirl on the flow characteristics in gas–liquid two-phase flow is largely unexplored, which is important for the application of swirl flow in the natural gas industry. Therefore, the effects of swirl on flow patterns and liquid unloading in gas–liquid two-phase vertical flow under stagnant conditions are investigated by visualization experiment in this work. A dimensionless parameter is proposed to quantitatively describe the capability of liquid unloading. The results show that interface morphology varies along the streamwise direction under stagnant liquid situations. In the case of slug flow, a swirler can suppress the fallback of falling liquid film. In the case of churn flow with relatively high gas velocity, the churn flow can be transformed to swirling annular flow once out of the swirler. The swirl is beneficial in unloading liquid when the gas velocity is relatively high. The critical gas velocity, which is defined as the minimum gas velocity to prevent the onset of liquid load up in the gas well, can be reduced in the swirl flow compared with that in non-swirling flow. In addition, the initial position of the liquid level has an influence on liquid unloading, and a swirler located below the initial position of the liquid level performs better in unloading liquid.","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":"86083519","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 SURFACE PROPERTIES ON AXISYMMETRICAL OSCILLATIONS OF A CYLINDRICAL BUBBLE","authors":"A. Alabuzhev","doi":"10.1615/interfacphenomheattransfer.2019031147","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019031147","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":"87909229","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}
A. Morozov, T. T. B’yadovskiy, K. V. Kubrak, M. Plotnikov, I. Yudin
{"title":"THERMAL MODEL-BASED DETERMINATION OF DISSOCIATION DEGREE OF HYDROGEN FLOWING IN A HOT TUBE","authors":"A. Morozov, T. T. B’yadovskiy, K. V. Kubrak, M. Plotnikov, I. Yudin","doi":"10.1615/interfacphenomheattransfer.2019030380","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019030380","url":null,"abstract":"A thermal model of a cylindrical thin-walled tube heated up to a high temperature by electric current has been developed. For the current-carrying tube, the heat conduction equation is solved by taking into account the tube radiation, heat exchange with the gas surrounding and flowing inside the tube, and the gas dissociation at the tube surface. The model is verified via comparison with experimental data on the hot tube temperature and electrical resistance for argon, helium, and hydrogen up to a tube temperature of 2200◦C. To ground the heat exchange with the flowing gas used in the model, calculations of the gas flow in the tube have been performed using the direct simulation Monte Carlo method. The proposed thermal model allows determining the channels of distribution of the energy released at the tube as a result of Joule heating. The calculated heat balance makes it possible to estimate the degree of hydrogen dissociation at the outlet of the tube.","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":"79500827","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}
P. Bellani, F. Milanez, M. Mantelli, S. Filippeschi, M. Mameli, F. Fantozzi
{"title":"THEORETICAL AND EXPERIMENTAL ANALYSES OF THE THERMAL RESISTANCE OF A LOOP THERMOSYPHON FOR PASSIVE SOLAR HEATING OF BUILDINGS","authors":"P. Bellani, F. Milanez, M. Mantelli, S. Filippeschi, M. Mameli, F. Fantozzi","doi":"10.1615/INTERFACPHENOMHEATTRANSFER.2019031160","DOIUrl":"https://doi.org/10.1615/INTERFACPHENOMHEATTRANSFER.2019031160","url":null,"abstract":"This study presents experimental and theoretical analyses of the thermal performance of a two-phase copper-R141b loop thermosyphon, which was developed for solar heating of buildings. A prototype of the so-called wall thermosyphon was built and tested at the Heat Pipe Laboratory of the Federal University of Catarina (Labtucal-UFSC). During the tests, three parameters were varied: purge method, power input levels, and inside wall evaporator roughness. The results show that both purge and vacuum pumps are equally effective in eliminating noncondensable gases from the system. Also, recent boiling heat transfer coefficient literature correlations are in good agreement with the experimental data from the prototype. However, the condensation thermal resistance calculated with the literature correlations do not represent the same trend found in the experiments. The effective thermal resistance of the wall thermosyphon prototype, which comprises the boiling resistance plus the condensation resistance, varies between 0.22 and 0.011 ◦ C/W depending on the heat transfer rate from 2.5 to 200 W.","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":"78991698","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":"SIMULTANEOUS IMBIBITION AND EVAPORATION OF LIQUIDS ON GROOVED SUBSTRATES","authors":"T. Gambaryan-Roisman","doi":"10.1615/interfacphenomheattransfer.2019031166","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019031166","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":"74535168","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}
Tao Gao, Fengtian Yue, Meng Sun, Jing Wei, Yi-jiang Wang
{"title":"A STEADY CALCULATION MODEL ON HEAT AND HUMIDITY PARAMETERS OF AIRFLOW IN HEAT HAZARD MINES","authors":"Tao Gao, Fengtian Yue, Meng Sun, Jing Wei, Yi-jiang Wang","doi":"10.1615/interfacphenomheattransfer.2020033145","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2020033145","url":null,"abstract":"In order to solve the problem of heat hazard in the main roadway of a shaft bottom, this paper establishes a steady calculation model to predict air conditioning airflow in the shaft. Based on the steady heat transfer theory, the model was used to calculate the convective heat and mass transfer between the airflow and shaft wall, as well as the heat conduction between the shaft wall and heat adjusting circle of wall rock. According to the analogous principles of heat and mass transfer, the water vapor transfer between the airflow and shaft wall was calculated. Furthermore, the energy balance equation was set up to consider the heat and humidity exchanges between the airflow, shaft wall, heat adjusting circle of wall rock, and gravity compression heat of the airflow. Meanwhile, the difference model was derived to calculate the heat and humidity parameters of the vertical shaft airflow. The developed model was applied to the auxiliary shaft at the Wutongzhuang Coal Mine. The calculated values of the heat and humidity parameters of airflow in the model were compared with the measured values in the shaft bottom. The results showed that the calculation errors of dry bulb temperature and relative humidity were less than 5.4% and 6.1%, respectively. Hence, this model is proper and acceptable, which could be used to predict the heat and humidity parameters of air conditioning airflow in a coal mine. The study is significant to the pithead cooling system design.","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":"79487565","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":"NUMERICAL STUDY OF DISPLACEMENT OF DROPLET IN A CHANNEL BY LATTICE BOLTZMANN METHOD","authors":"Bo Xu, Xin Wang, Zhen-qian Chen","doi":"10.1615/INTERFACPHENOMHEATTRANSFER.2019030498","DOIUrl":"https://doi.org/10.1615/INTERFACPHENOMHEATTRANSFER.2019030498","url":null,"abstract":"Displacement of an immiscible droplet subject to gravitational force in a channel is studied numerically by the lattice Boltzmann method. Dynamic behavior of the droplet is illustrated and the influence of gravitational coefficients, contact angles, and droplet size on the wetting length is analyzed. For θ = 57.0◦, the wetting length of the droplet increases with the time step and finally pinches off. For θ = 88.8◦ and 113.8◦, the wetting length for both decreases with the time step, but it will decrease to zero and detach from the surface for 113.8◦, which is different from 88.8◦. Furthermore, the gravitational coefficient has a significant influence on the wetting length. In the case of θ = 57.0◦, the wetting length increases with the increase in gravitational coefficient. As it increases to 0.002, the droplet pinches off. It is easier for the droplet with θ = 113.8◦ to detach from the surface. The larger droplet radius is beneficial for detaching from the surface for θ = 113.8◦ and the wetting length is extended for θ = 57.0◦ and θ = 88.8◦.","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":"79975834","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}
A. Rebrov, M. Bobrov, A. Emelyanov, N. Timoshenko, M. Hrebtov, I. Yudin
{"title":"EXPERIENCE IN THE SYNTHESIS OF DIAMOND FROM A SUPERSONIC MICROWAVE PLASMA JET","authors":"A. Rebrov, M. Bobrov, A. Emelyanov, N. Timoshenko, M. Hrebtov, I. Yudin","doi":"10.1615/interfacphenomheattransfer.2019031315","DOIUrl":"https://doi.org/10.1615/interfacphenomheattransfer.2019031315","url":null,"abstract":"In this paper, the traditional method of microwave plasma generation is used in combination with the formation of a high-velocity plasma flow from a resonant chamber into an evacuated deposition chamber. In the experiments, a modernized magnetron with power up to 3 kW at a frequency of 2.45 GHz is used. The calculations of the microwave plasma formation process make, in practice, it possible to estimate the optimal geometry of the discharge chamber for an acceptable distribution of the electromagnetic field in the discharge region. The gas-dynamic calculations give an estimate of the approximate content of atomic hydrogen at the deposition surface. The results of the work determine ways for further research on the synthesis of diamond from high-speed microwave plasma jets.","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":"82670634","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}