Journal of Engineering Thermophysics最新文献_第3页

Numerical Simulation of Droplet-Laden Flow in a Cylindrical Duct in the Absence of Cross-Flow 无横流条件下圆柱形管道内载液滴流动的数值模拟

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700213

M. A. Pakhomov

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Study of Diffusion Combustion of a Hydrogen Microjet in the Presence of a Coaxially Supplied Air Flow 同轴送风条件下氢气微射流扩散燃烧的研究

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700201

A. S. Tambovtsev, V. V. Kozlov, Yu. A. Litvinenko, A. G. Shmakov

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Modeling and Analysis of Magneto-Hydrodynamic Sisko Nanofluid Flow over a Nonlinearly Stretchable Porous Sheet with Thermal Radiation 热辐射下非线性可拉伸多孔板上磁流体动力学Sisko纳米流体流动建模与分析

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700298

Prathi Vijaya Kumar, Kanithi Jyothsna, Shaik Mohammed Ibrahim, Syamala Ramadevu, Giulio Lorenzini

{"title":"Modeling and Analysis of Magneto-Hydrodynamic Sisko Nanofluid Flow over a Nonlinearly Stretchable Porous Sheet with Thermal Radiation","authors":"Prathi Vijaya Kumar, Kanithi Jyothsna, Shaik Mohammed Ibrahim, Syamala Ramadevu, Giulio Lorenzini","doi":"10.1134/S1810232825700298","DOIUrl":"10.1134/S1810232825700298","url":null,"abstract":"This work examines the action of a magneto-Sisko fluid within a two-dimensional setting when it is subjected to a nonlinearly extensible sheet with a porous medium. The assessment considers the impacts of a continuous magnetic field, thermal radiation, and heat creation while also considering the implications of Brownian motion and thermophoresis diffusion. By employing appropriate similarity transformations, the sets of partial differential equations governing the system are transformed into a set of ordinary differential equations. These are then solved utilizing the NDSolve technique in MATHEMATICA. This research offers a tangible explanation for simulating and analyzing distinct flow properties, like concentration, temperature, and velocity profiles, in return for numerous influencing factors. These data reveal that raising the Sisko fluid parameter enhances the velocity profiles while reducing both the temperature and concentration curves. In addition, greater values of the power-law exponent and the nonlinear stretching coefficient result in reduced velocity, temperature, and concentration profiles. The results agree with the conclusions of previous investigations.","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"34 4","pages":"793 - 810"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579488","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}

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Radial Uniformity in Trickle Beds: CFD Insights into Gas-Liquid Distributor Design at Industrial Scale 滴流床径向均匀性：工业规模气液分布器设计的CFD洞察

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700304

Peng Yan, Zeqi Chen, Bowen Zhao, Xueli Geng, Xin Gao, Liyan Liu, Haibo Jin

{"title":"Radial Uniformity in Trickle Beds: CFD Insights into Gas-Liquid Distributor Design at Industrial Scale","authors":"Peng Yan, Zeqi Chen, Bowen Zhao, Xueli Geng, Xin Gao, Liyan Liu, Haibo Jin","doi":"10.1134/S1810232825700304","DOIUrl":"10.1134/S1810232825700304","url":null,"abstract":"The radial uneven distribution of the liquid phase in trickle beds significantly impacts mass transfer, heat transfer, and reaction efficiency. This study addresses the gap in optimizing gas-liquid distributors for enhanced radial uniformity, particularly in high gas-liquid ratio, low spray density, multiphase exothermic reaction systems. Using CFD simulations, a quasi-homogeneous model was combined with bulk chemical reaction and porous media models to simulate the catalytic process in industrial trickle beds. The effects of various chimney structures in liquid and gas-liquid distributors on radial velocity, composition, and temperature distribution were analyzed. Key findings reveal that coil-type distributors outperform grid-type and perforated designs in terms of overflow liquid layer performance. Additionally, the four-leaf quincunx chimney structure provides superior radial uniformity compared to the eight-leaf and windmill-type outlets. The study’s results contribute to the safer operation and optimized design of trickle bed reactors for highly exothermic reactions.","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"34 4","pages":"811 - 831"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579494","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}

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Capillary Wicking and Heat Transfer during Boiling of HFE-7100 on Black Silicon Surfaces with Different Morphologies 不同形态黑硅表面HFE-7100沸腾过程中的毛细抽吸和传热

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700225

O. Volodin, E. Vyacheslavova, A. Baranov, I. Malakhov, S. Konev, I. Kosovskikh, V. Serdyukov

{"title":"Capillary Wicking and Heat Transfer during Boiling of HFE-7100 on Black Silicon Surfaces with Different Morphologies","authors":"O. Volodin, E. Vyacheslavova, A. Baranov, I. Malakhov, S. Konev, I. Kosovskikh, V. Serdyukov","doi":"10.1134/S1810232825700225","DOIUrl":"10.1134/S1810232825700225","url":null,"abstract":"The paper presents the results of an experimental study on the effect of the morphology of a hemi-wicking black silicon surface on capillary wicking and heat transfer characteristics during pool boiling of HFE-7100. The investigated homogeneous and hybrid silicon surfaces were fabricated using low-temperature plasma-chemical etching. It was shown that the modified silicon surfaces enhance liquid wicking, with taller homogeneous needle-like microstructures promoting more efficient liquid spreading. Hybrid surfaces (combining low and high needle-like microstructures) exhibit significantly higher values of the Wi number (characterizing capillary wicking) compared to homogeneous ones. Heat transfer experiments were carried out on the most efficient (in terms of capillary wicking) homogeneous and hybrid black silicon surfaces. Unlike in the case of water boiling, the expected increase in critical heat flux (CHF) was not achieved for HFE-7100 on black silicon surfaces due to the partial or complete loss of hydrophilicity during boiling. Instead, the experiments revealed a noticeable enhancement of the heat transfer coefficient (HTC) on both homogeneous and hybrid surfaces, which can be attributed exclusively to the effect of microstructuring rather than capillary wicking.","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"34 4","pages":"709 - 720"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579201","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}

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The Effect of Phase-Change Material on the Efficiency of Decentralized Ventilation Systems 相变材料对分散通风系统效率的影响

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700286

I. V. Mezentsev, D. B. Chapayev, S. A. Tihomirov, D. G. Titkov

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The Influences of Various Fin and Corrugation Arrangements on Flow Characteristics and Transfer of Heat in Ducts of Semi-Circular Grooved Using Diamond–Water Nanofluid 不同翅片和波纹布置对金刚石-水纳米流体半圆沟槽管内流动特性和传热的影响

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700341

Koray Karabulut, Yeliz Alnak

{"title":"The Influences of Various Fin and Corrugation Arrangements on Flow Characteristics and Transfer of Heat in Ducts of Semi-Circular Grooved Using Diamond–Water Nanofluid","authors":"Koray Karabulut, Yeliz Alnak","doi":"10.1134/S1810232825700341","DOIUrl":"10.1134/S1810232825700341","url":null,"abstract":"In this work, the transfer of heat and characteristic of flow in semi-circular grooved finless, double and triple semi-circular grooved finned channels were researched numerically by comparing them with the straight channel. Using the Ansys-Fluent computer program, numerical analysis was performed by solving the conservation equations under steady, two-dimensional and laminar flow conditions. To better direct the flow to the lower surfaces of corrugated channels with constant surface temperature, the fins were positioned between the grooves at the top surface of the duct at angles of 30°, 60°, and 90° (θ) with the horizontal and at different heights of 3, 6, and 9 mm (z). The outcomes of the work were searched as variations in the mean Nu number (Num corrugated ch/Num straight ch., mean surface temperature (Tsm corrugated ch/Tsm straight ch) and performance evaluation criteria (PEC), taking into account the effects of fin angles and heights for all the semi-circular grooved channels employing water and diamond–water nanofluid. The study’s outcomes were checked against both the numerical outcomes and, the analytical equation of the work in the literature giving the mean Nu number (Num) under the condition of flow of laminar. The outcomes illustrated that increasing the fin height (z) from 3 to 9 mm for Re = 600 in the double semi-circular grooved duct with a 60° fin angle provides the (Num corrugated ch/Num straight ch rate increase by 11.99%. Moreover, for Re = 1000, the PEC value of the triple semi-circular corrugated channel with θ = 90° and z = 9 mm fins and nanofluid is 5.15% higher than that of the double corrugated finned channel.","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"34 4","pages":"857 - 881"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579205","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}

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Control of Flow Structure of Supersonic Underexpanded Jet of Rarified Gas 超声速稀薄气体欠膨胀射流流动结构控制

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700195

V. N. Yarygin, V. G. Prikhodko, I. V. Yarygin

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On the Hall–Vinen–Bekharevich–Khalatnikov Model in Superfluid Turbulence in He II He超流体湍流中的Hall-Vinen-Bekharevich-Khalatnikov模型

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232825700250

S. K. Nemirovskii

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Parametric Study of Heat Transfer in Water–Alumina Nanofluid Flow Inside Porous Tube with Multiple Heat Sources 多热源多孔管内水-氧化铝纳米流体传热参数研究

IF 1.4 4区工程技术

Journal of Engineering Thermophysics Pub Date : 2026-04-01 DOI: 10.1134/S1810232826700049

Ali Salehi-Shabestari, Mohsen Pirmohammadi, Salman Krampour

{"title":"Parametric Study of Heat Transfer in Water–Alumina Nanofluid Flow Inside Porous Tube with Multiple Heat Sources","authors":"Ali Salehi-Shabestari, Mohsen Pirmohammadi, Salman Krampour","doi":"10.1134/S1810232826700049","DOIUrl":"10.1134/S1810232826700049","url":null,"abstract":"In this problem, heat transfer and the flow of water–alumina nanofluid inside a porous tube was studied. The constant heat flux was applied by three heat sources at different locations. The aim of this study was to find the optimal location for the three mentioned heat sources in order to facilitate heat transfer. Also the effects of Reynolds number (flow velocity), pipe porosity and different volume fractions of alumina nanoparticles in water on heat transfer were investigated. It was found that as the distance of other heat sources from the first heat source increases, the wall temperature reduces and therefore, for the same heat flux, the heat transfer coefficient and Nusselt number increase and heat transfer is improved. Also, it is observed that increasing the pipe porosity does not affect the temperature of the fluid mass at the outlet. In addition, by increasing the volume fraction of alumina nanoparticles, and heat transfer improves, but the bulk temperature at the outlet decreases, which is due to the significant increase in the mass flow rate of the inlet fluid with the addition of alumina nanoparticles.","PeriodicalId":627,"journal":{"name":"Journal of Engineering Thermophysics","volume":"34 4","pages":"948 - 959"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579127","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