Journal of Engineering Thermophysics最新文献

Influence of a Plate Apparatus Inclination on the Available Hydropneumatic Power of an Oscillating Water Column Device Using Constructal Design 基于结构设计的板式装置倾角对振荡水柱装置可用油气力的影响

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S1810232826010145

M. Moreira, V. Motta, A. Razera, M. Gomes, B. Machado, L. Rocha, E. Santos, G. Lorenzini, L. Isoldi

引用次数: 0

Influence of Surfactants in Low Concentrations on Bubble Rising Velocity in Inclined Channel 低浓度表面活性剂对倾斜通道气泡上升速度的影响

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S1810232826010066

M.A. Vorobyev, A.O. Karhov

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A Study of the Influence of Through Holes on the Flow Characteristics around a Cylinder at High Reynolds Numbers 通孔对高雷诺数圆柱绕流特性影响的研究

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S181023282601008X

A.A. Lukyanov, M.Yu Nichik, A.S. Lebedev, K.G. Dobroselsky, V.M. Dulin

{"title":"A Study of the Influence of Through Holes on the Flow Characteristics around a Cylinder at High Reynolds Numbers","authors":"A.A. Lukyanov, M.Yu Nichik, A.S. Lebedev, K.G. Dobroselsky, V.M. Dulin","doi":"10.1134/S181023282601008X","DOIUrl":"10.1134/S181023282601008X","url":null,"abstract":"An experimental study on the influence of through holes on the flow around an axisymmetric cylinder and the features of flow separation for different angles of inclination relative to the main flow is conducted with the aim of developing methods for passive control of separated flows at high Reynolds numbers (from (1.74times10^5) to (2.75times10^5)). Flow velocity field measurements on a hydrodynamic test bench are performed using the high-speed PIV method. A comparative analysis of the mean flow and near wake characteristics is accomplished with varying hole inclination angles relative to the flow direction ((0^circ), (45^circ), and (90^circ)). It is shown that the presence of through holes located in the flow direction ((0^circ)) and at an angle ((45^circ)) leads to a significant decrease in the recirculation zone size with increasing Reynolds number, as compared to a regular cylinder without through holes. Moreover, the recirculation zone for a rotation angle of (0^circ) decreases by 1.5 times compared to a rotation angle of (45^circ). In the case where the holes are arranged perpendicular to the flow ((90^circ)), a strong influence on the flow separation dynamics is observed, in particular, leading to a significant decrease in the size of the recirculation zone and an almost constant value of the dimensionless vortex shedding frequency, in contrast to the other cases considered.","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"35 1","pages":"72 - 80"},"PeriodicalIF":1.5,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148878012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Simple Method for Predicting Melting Interface Final Position of Myristic Acid in a Cylindrical System 一种预测圆柱形体系中肉豆酱酸最终熔化界面位置的简单方法

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S181023282601011X

Đ Doder, D. Đaković, M. Kljajić, B. Stepanov, S. Mihok, N. Milivojević

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Dynamics of the Gas—Liquid Mixture Flow in the Pipe Taking into Account Mass Transfer and Exchange Process 考虑传质交换过程的管内气液混合流动动力学

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S1810232826010170

E.M. Abbasov, N.A. Agaeva

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Nonlocal Two-Velocity Elasticity Theory of Fluid-Saturated Rock 饱和流体岩石非局部双速弹性理论

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S1810232826010133

Yu.V. Perepechko, V.N. Dorovsky

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Heat Transfer during Evaporation and Boiling of a Liquid Film Flowing Down on a Bundle of Rough Tubes 在一束粗管上流动的液体膜蒸发和沸腾过程中的传热

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S1810232826010029

P.I. Geshev, I.I. Gogonin

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Experimental Investigation into Influence of Channel Gap Size on Heat Transfer during Boiling of Subcooled Water Flow 过冷水沸腾过程中通道间隙尺寸对传热影响的实验研究

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S1810232826010169

B.M. Gasanov

{"title":"Experimental Investigation into Influence of Channel Gap Size on Heat Transfer during Boiling of Subcooled Water Flow","authors":"B.M. Gasanov","doi":"10.1134/S1810232826010169","DOIUrl":"10.1134/S1810232826010169","url":null,"abstract":"The paper presents the results of an experimental investigation into heat transfer during boiling of subcooled water flow at a circular surface of 7 mm in diameter set up at the center of a channel with a rectangular cross-section of 14 mm in width and 50 mm in length. The aim of the investigation was to reveal the effect of the limitedness of the space for growth of a vapor bubble on heat transfer. The growth of a vapor bubble was only confined by the opposite wall of the channel, whereas the edges of the heat-releasing surface were in a flow of water underheated to saturation temperature. The dimensions of the gap from the heated surface to the opposite wall of the channel were 0.3, 0.6, and 3 mm. The investigations were performed at atmospheric pressure, mass velocity of 127–370 kg/(m2 s), heat fluxes of 50–4800 kW/m2, and water temperatures at the channel inlet equal to 25, 50, and 70◦C. Depending on the gap size, three boiling regimes were visualized: boiling with deformed bubbles, combined boiling with deformed and isolated bubbles, and boiling with isolated bubbles. The experimental heat transfer coefficients were analyzed with the use of eight correlations well known from the literature. The data obtained are most accurately predicted by the correlation of Lee and Mudowar [45] with a mean absolute error of 5.6%.","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"35 1","pages":"175 - 191"},"PeriodicalIF":1.5,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148878011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Experimental Study of Heat Transfer at the Interface between Two Immiscible Liquids Using Two-Color PLIF Method 用双色PLIF法研究两种不混相液体界面处的传热

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S1810232826010091

A.A. Zotyeva, M.Yu Nichik, V.M. Dulin

{"title":"An Experimental Study of Heat Transfer at the Interface between Two Immiscible Liquids Using Two-Color PLIF Method","authors":"A.A. Zotyeva, M.Yu Nichik, V.M. Dulin","doi":"10.1134/S1810232826010091","DOIUrl":"10.1134/S1810232826010091","url":null,"abstract":"This study aims to enhance the accuracy and reliability of temperature measurements in liquid films and droplets using an extended two-color/two-dye planar laser-induced fluorescence (2C/2D PLIF) method. The experiment employs Kiton Red (temperature-sensitive) and Rhodamine 6G (temperature-insensitive) dyes to compensate for concentration fluctuations and environmental effects. A calibrated setup with synchronized cameras, optical filters, and a pulsed laser is used to capture the fluorescence intensities of glycerol and oil emulsions. The key results demonstrate a successful reconstruction of the temperature fields with a spatial resolution of 138 pixels/mm and an RMS error below 5%, validated against thermocouple measurements. The most significant finding is that the method resolves thermal gradients in both stratified and mixed-phase systems, though optical distortions at the interfaces pose challenges. The major conclusion highlights the potential of the 2C/2D PLIF method for high-resolution, non-contact thermometry in combustion and heat transfer applications, future improvements being needed to address interfacial artifacts.","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"35 1","pages":"81 - 90"},"PeriodicalIF":1.5,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148877966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Boiling Heat Transfer Enhancement on Surfaces with Hydrophobic Grooves 疏水沟槽表面的沸腾传热增强

IF 1.5 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-09-04 DOI: 10.1134/S1810232826010030

E.A. Chinnov, S.Ya. Khmel, V.Yu. Vladimirov, K.A. Emelyanenko, A.M. Emelyanenko, L.B. Boinovich

{"title":"Boiling Heat Transfer Enhancement on Surfaces with Hydrophobic Grooves","authors":"E.A. Chinnov, S.Ya. Khmel, V.Yu. Vladimirov, K.A. Emelyanenko, A.M. Emelyanenko, L.B. Boinovich","doi":"10.1134/S1810232826010030","DOIUrl":"10.1134/S1810232826010030","url":null,"abstract":"Experiments were performed to study water pool boiling at atmospheric pressure on biphilic surfaces with grooves (open microchannels) produced by laser ablation and hydrophobized owing to chemisorption of fluorinated methoxysilane from vapor at a temperature of 100–110 ◦C. Surfaces with arrays of parallel grooves, as well as with arrays of grooves intersecting at right angles (groove grids with square cells), were used. The experimental data were analyzed and compared with literature and previous data. The influence of the size and location of hydrophobic regions on boiling heat transfer enhancement was studied. It has been shown that the main parameter determining the heat transfer enhancement for a surface with an array of parallel grooves is the pitch between them. For groove grids, this is also true, but only for large heat fluxes. Removal of the hydrophobizer from the grooves leads to a significant decrease in heat transfer. A comparison of the results of this study with previous data for arrays of hydrophobic cavities and arrays of hydrophobic round spots on a flat surface shows enhanced heat transfer on biphilic surfaces compared to a flat smooth surface. These surfaces are characterized by a strong dependence of heat transfer on the pitch between the hydrophobic regions. The maximum effect on heat transfer was observed on surfaces with a 3D biphilic pattern, namely on arrays of microcavities and arrays of intersecting grooves (groove grids with square cells).","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"35 1","pages":"21 - 35"},"PeriodicalIF":1.5,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148878201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0