International Communications in Heat and Mass Transfer最新文献_第2页

A numerical analysis of the interfacial evaporation characteristics of low surface tension refrigerants (R32/R1234yf) and water under low ambient pressure 低表面张力制冷剂（R32/R1234yf）与水在低环境压力下界面蒸发特性的数值分析

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-15 DOI: 10.1016/j.icheatmasstransfer.2025.110316

Haiyu Fu , Gegentana , Leping Zhou , Xiaoze Du

This study employs piston-controlled molecular dynamics simulations to investigate evaporation mechanisms of low-surface-tension refrigerants (R32, R1234yf) at gas-liquid interfaces under low ambient pressures, important for microcomponent cooling. Simulations reveal that the inherently low surface tensions result in rougher interfaces, enhancing evaporation. Reduced ambient pressure further lowers molecular interaction energies, facilitating liquid film evaporation. Results show the mass accommodation coefficient decreases by up to 12.81 % with pressure drop, while mass flux and heat flux increase by 341.33 % and 15.09 %, respectively, indicating pressure-dependent competition between molecular escape and thermal transport. Temperature rise intensifies evaporation; R1234yf exhibits the largest mass accommodation coefficient reduction (48.14 %), and refrigerants show order-of-magnitude heat flux sensitivity to temperature. Utilizing the Schrage equation, mass flux, heat flux, and mass accommodation coefficient are derived. These models are then corrected using the Arrhenius equation and transition state theory to develop a modified model capturing synergistic temperature-pressure effects on evaporation. The work resolves uncertainties in low-pressure interfacial dynamics for low-surface-tension liquids, providing mechanistic insights into how interfacial roughness and energy barriers govern phase change efficiency, establishing a basis for optimizing refrigerant performance in low-pressure cooling systems.

本研究采用活塞控制的分子动力学模拟研究了低环境压力下低表面张力制冷剂（R32, R1234yf）在气液界面的蒸发机制，这对微部件冷却至关重要。模拟表明，固有的低表面张力导致更粗糙的界面，加速蒸发。环境压力的降低进一步降低了分子相互作用能，促进了液膜的蒸发。结果表明，随着压力的降低，质量调节系数降低了12.81%，而质量通量和热通量分别增加了341.33%和15.09%，表明分子逸出和热输运之间存在压力依赖性竞争。温度升高加剧了蒸发；R1234yf表现出最大的质量容纳系数降低（48.14%），制冷剂对温度表现出数量级的热流密度敏感性。利用施拉格方程，导出了质量通量、热通量和质量调节系数。然后使用阿伦尼乌斯方程和过渡态理论对这些模型进行修正，以建立一个捕获温度-压力对蒸发的协同效应的修正模型。这项工作解决了低表面张力液体低压界面动力学中的不确定性，为界面粗糙度和能量障碍如何控制相变效率提供了机制见解，为优化低压冷却系统中的制冷剂性能奠定了基础。

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引用次数: 0

Electrothermal flow and entropy generation in a rotating wavy microchannel 旋转波状微通道中的电热流动和熵的产生

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-15 DOI: 10.1016/j.icheatmasstransfer.2025.110304

N.K. Ranjit , A. Sengupta , A. Mondal , G.C. Shit

This study examines the combined effects of electrothermal and rotational forces on fluid flow, heat transfer, and entropy generation in a sinusoidal wavy microchannel. We consider a dilute electrolyte solution driven by an external electric field, and the entire system rotates about its longitudinal axis. The governing nonlinear Poisson

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Boltzmann, momentum, and energy equations are solved numerically using a finite difference scheme. The results obtained are independently validated against a finite element-based direct numerical simulation of the governing equations without having any approximations. The analysis focuses on how the rotational Reynolds number, wall amplitude, ionic energy parameter, and Joule heating influence electroosmotic velocity, temperature distribution, and thermodynamic irreversibility. Results show that rotation suppresses axial velocity and weakens convective heat transfer, while larger wall undulations enhance secondary flows. The combined electroosmotic and viscous effects increase entropy generation, whereas stronger rotational effects reduce it. The findings provide physical insights into optimizing flow uniformity and heat removal in rotating electrokinetic microfluidic systems such as lab-on-a-disk devices.

本研究考察了电热和旋转力对正弦波微通道中流体流动、传热和熵产生的综合影响。我们考虑一个由外电场驱动的稀电解质溶液，整个系统绕其纵轴旋转。控制非线性泊松-玻尔兹曼，动量和能量方程的数值解决使用有限差分格式。所得到的结果在没有任何近似的情况下，通过基于有限元的直接数值模拟对控制方程进行了独立验证。分析了旋转雷诺数、壁面振幅、离子能参数和焦耳热对电渗透速度、温度分布和热力学不可逆性的影响。结果表明，旋转抑制了轴向速度，减弱了对流换热，而较大的壁面波动增强了二次流动。电渗透和粘滞效应联合作用增加了熵的产生，而较强的旋转效应则减少了熵的产生。这些发现为优化旋转电动微流体系统（如盘上实验室设备）的流动均匀性和散热提供了物理见解。

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引用次数: 0

RSM-based optimization of multi-nozzle spray cooling parameters in glass tempering 基于rsm的玻璃回火多喷嘴喷雾冷却参数优化

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-15 DOI: 10.1016/j.icheatmasstransfer.2025.110297

Tian Liang , Wang Liangliang , Liu Fengxiao , Wang Hongxin

Under the carbon neutrality goal, improving cooling efficiency is essential for reducing energy consumption in glass tempering. Spray cooling has attracted attention due to its high heat transfer efficiency, with spray flux being a key factor affecting heat flux distribution and tempering quality. This study conducted multi-nozzle spray tempering experiments on 100 × 100 × 5 mm glass to investigate the effects of spray distance, mist loading fraction, nozzle spacing, and glass movement speed on effective spray flux. The impacts on fragment count, cooling energy consumption, and surface temperature uniformity were analyzed, and a multi-objective regression model based on response surface methodology was developed to optimize parameter combinations. Results show that a spray distance of 180 mm, mist loading fraction of 0.55, nozzle spacing of 56.3 mm, and glass speed of 0.08 m/s achieve optimal spray flux, producing 394 fragments, 0.006625 kW·h of cooling energy, and excellent temperature uniformity. This study provides theoretical guidance and practical reference for the optimization and industrial application of spray cooling in large-sized glass tempering.

在碳中和目标下，提高冷却效率是降低玻璃回火能耗的关键。喷雾冷却因其较高的传热效率而备受关注，而喷雾通量是影响热流密度分布和回火质量的关键因素。本研究对100 × 100 × 5 mm玻璃进行了多喷嘴喷雾回火实验，研究了喷雾距离、雾剂加载分数、喷嘴间距和玻璃运动速度对有效喷雾通量的影响。分析了对碎片计数、冷却能耗和表面温度均匀性的影响，建立了基于响应面法的多目标回归模型，对参数组合进行优化。结果表明：当喷雾距离为180 mm、雾剂加载分数为0.55、喷嘴间距为56.3 mm、玻璃速度为0.08 m/s时，可获得最佳喷雾通量，可产生394片碎片，冷却能量为0.006625 kW·h，温度均匀性良好。本研究为大型玻璃钢化工艺中喷雾冷却的优化及工业应用提供了理论指导和实践参考。

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引用次数: 0

Machine learning prediction of flame temperatures in ammonia combustion within a porous burner 多孔燃烧器中氨燃烧火焰温度的机器学习预测

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-15 DOI: 10.1016/j.icheatmasstransfer.2025.110270

Ye Liu, Guanqing Wang, Yanan Li, Shujing Xu, Xiangxiang Chen, Dan Luo

Temperature measurement serves as a critical performance indicator for evaluating combustion, requiring accurate acquisition of its spatiotemporal profiles to effectively analyze thermal behavior. This study proposes an ensemble learning algorithm based on the Bagging aggregation strategy to predict flame temperature in ammonia combustion within a porous burner. The ensemble model integrates the predictive outputs of three base models, Random Forest, eXtreme Gradient Boosting, and Support Vector Regression, to construct a robust data-driven framework for temperature distribution prediction. Model performance was evaluated and compared utilizing both a ten-fold cross-validation and a leave-one-condition-out (LOCO) scheme. The results reveal that the ensemble model consistently outperforms the individual base models, achieving higher prediction accuracy and improved generalization by leveraging multi-modal feature complementarity. Furthermore, the ensemble model is applied to reconstruct the pixel-level temperature distribution of the external flame surface in pure ammonia combustion within porous media, achieving a two-dimensional spatial reconstruction. This map exhibits excellent color gradient continuity in the high-temperature area, with temperature gradients visually consistent with the physical distribution. The findings underscore the strong potential of ensemble machine learning approaches for high-fidelity flame temperature prediction and their value in enabling non-contact diagnostics in complex combustion scenarios.

温度测量是评估燃烧的关键性能指标，需要准确获取其时空分布以有效分析热行为。本文提出了一种基于Bagging聚集策略的集成学习算法，用于预测多孔燃烧器内氨燃烧的火焰温度。该集成模型集成了随机森林、极端梯度增强和支持向量回归三个基本模型的预测输出，构建了一个鲁棒的数据驱动的温度分布预测框架。利用十倍交叉验证和留下一个条件（LOCO）方案对模型性能进行评估和比较。结果表明，集成模型始终优于单个基础模型，通过利用多模态特征互补性实现更高的预测精度和改进的泛化。在此基础上，利用系综模型重构了多孔介质中纯氨燃烧外火焰表面的像素级温度分布，实现了二维空间重构。该图在高温区表现出良好的颜色梯度连续性，温度梯度在视觉上与物理分布一致。这些发现强调了集成机器学习方法在高保真火焰温度预测方面的强大潜力，以及它们在复杂燃烧场景中实现非接触诊断的价值。

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引用次数: 0

Numerical study on the effects of geometric configuration on the combustion process in jet-vortex combustors 几何构型对射流涡燃烧室燃烧过程影响的数值研究

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-15 DOI: 10.1016/j.icheatmasstransfer.2025.110236

Jing-hao Zhang , Ming-shu Bi , Yuan Wang , Jing-jie Ren

This numerical investigation compares three jet-vortex combustors: constant-diameter single-vortex (CD-SV), reduced-diameter single-vortex (RD-SV), and reduced-diameter double-vortex (RD-DV). Species distribution and flow dynamics were analyzed to determine the optimal tubular flame configuration based on temperature uniformity and methane combustion efficiency. CD-SV exhibited poor mixing and temperature homogeneity. At Q_Fuel = 4 L·min⁻¹, combustion exhibited low heat release rate with incomplete with incomplete O₂ coverage and high CO. At 12 L·min⁻¹, unburned CH₄ persisted centrally due to poor mixing, yielding high temperature non-uniformity. RD-SV's geometric constriction enhanced flow organization by breaking down the central jet and establishing stable recirculation zones, which achieved complete O₂ coverage, stable wall combustion, reduced CO, and improved temperature homogeneity. RD-DV further intensified flow perturbations, forming symmetric dual-layer reaction zones (central and wall) at 12 L·min⁻¹ with homogeneous CO₂ distribution and peak heat release. RD-DV demonstrated optimal performance (>96 % methane burnout, minimal temperature variation). While RD-SV performed well at high flow rates, CD-SV was least effective. Geometric constriction optimizes flow fields, while double-vortex configuration maximizes mixing efficiency and combustion performance across all conditions.

本文对三种射流涡燃烧室进行了数值研究：定径单涡燃烧室（CD-SV）、减径单涡燃烧室（RD-SV）和减径双涡燃烧室（RD-DV）。在考虑温度均匀性和甲烷燃烧效率的基础上，分析了管状火焰的种类分布和流动动力学，确定了最佳的管状火焰结构。CD-SV表现出较差的混合和温度均匀性。当QFuel = 4 L·min−1时，燃烧表现出低热量释放率，O2覆盖不完全，CO含量高。当QFuel = 12 L·min−1时，由于混合不良，未燃烧的CH4集中存在，产生高温不均匀性。RD-SV的几何收缩通过破坏中心射流和建立稳定的再循环区来增强流动组织，从而实现完全的O2覆盖，稳定的壁面燃烧，减少CO，改善温度均匀性。RD-DV进一步加剧了流动扰动，在12 L·min−1下形成对称的双层反应区（中央和壁面），CO2分布均匀，热释放峰值达到峰值。RD-DV表现出最佳的性能（>； 96%的甲烷燃烧，最小的温度变化）。RD-SV在高流速下表现良好，CD-SV效果最差。几何收缩优化流场，而双涡配置最大限度地提高混合效率和燃烧性能在所有条件下。

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引用次数: 0

Enhanced heat transfer characteristics and energy efficiency of ceramic manifold micro-channels for automobiles high-power IGBT cooling 用于汽车大功率IGBT冷却的陶瓷流形微通道的强化传热特性和能效

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-15 DOI: 10.1016/j.icheatmasstransfer.2025.110276

Shuai Feng , Zhanhong Cui , Ziqiang He , Chenguang Lai , Jie Song , Weiping Li , Ranran Fang , Zhanxiao Kang , Lijuan Fu

To improve thermal management for high power automotive insulated gate bipolar transistors (IGBTs) modules, this study proposes a near-junction cooling solution utilizing a manifold micro-channel (AlN MMC-BCS) integrated within the packaging ceramic layer. The thermal and hydraulic performance is evaluated and optimized via an experimentally validated numerical approach combined with multi-objective optimization. Results show that the optimized AlN MMC-BCS reduces pressure drop by 27.6 % at 8 L/min without sacrificing heat transfer performance, while achieving nearly twice the heat transfer coefficient compared to conventional pin-fin structures. These enhancements are attributed to optimized manifold and micro-channel designs that promote jet impingement and vortex-induced mixing, significantly improving local flow velocity and turbulent mixing efficiency. Furthermore, the AlN MMC-BCS demonstrates superior thermal performance with a total thermal resistance as low as 0.25 °C/W-a reduction of 0.07 °C/W-effectively mitigating high-temperature hotspots and uneven temperature distribution among multiple chips. The maximum temperature is consistently controlled between 100.5 °C and 103.5 °C, with reductions of 15.9 °C in peak temperature and 9.5 °C in temperature difference. Overall, the proposed cooling strategy significantly enhances thermal uniformity and cooling efficiency at substantially lower pumping power.

为了改善高功率汽车绝缘栅双极晶体管（igbt）模块的热管理，本研究提出了一种利用集成在封装陶瓷层内的流形微通道（AlN MMC-BCS）的近结冷却解决方案。采用实验验证的数值方法，结合多目标优化方法，对热工性能和水力性能进行了评价和优化。结果表明，优化后的AlN MMC-BCS在8 L/min的速度下，在不牺牲换热性能的情况下，压降降低了27.6%，换热系数是传统翅片结构的近两倍。这些增强归功于优化的流形和微通道设计，这些设计促进了射流撞击和涡诱导混合，显著提高了局部流动速度和湍流混合效率。此外，AlN MMC-BCS表现出优异的热性能，总热阻低至0.25°C/ w，降低0.07°C/ w，有效缓解了高温热点和多芯片之间的温度分布不均匀。最高温度始终控制在100.5°C和103.5°C之间，峰值温度降低15.9°C，温差降低9.5°C。总体而言，所提出的冷却策略在较低的泵送功率下显著提高了热均匀性和冷却效率。

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引用次数: 0

Constructal law, discriminated dimensional analysis and boundary layer similarities: Fluid flow and natural convection 构造规律、判别量纲分析和边界层相似性：流体流动和自然对流

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-15 DOI: 10.1016/j.icheatmasstransfer.2025.110294

Ventsislav D. Zimparov , Jordan Y. Hristov , Plamen J. Bonev

This paper presents some new pieces of evidence in confirmation of Bejan's invention related to the problem invoking the constructal law in the evolution of a flow configuration towards enhancing the spreading of momentum and heat transfer away from a wall. Using the discriminated dimensional analysis (DDA) and the method of Huntley as a tool, several new problems from fluid mechanics and convection heat transfer have been solved and added to the confirmation of Bejan's invention. It has been shown how the shape of the fluid volume (not slender) at a transient drainage of a free stream flow along a vertical plane or droplet spreading on a dry, smooth solid surface develops in time, becoming slender, similar to the shape of the boundary layer. When natural convection along a vertical isothermal wall is available, simultaneously with the fluid volume with momentum diffusivity, another fluid volume with thermal diffusivity develops. The coincidence of the two shapes (constructal vs. boundary layer) has been revealed through the transformation of the bulky forms (non-slender) into slender ones.

本文提出了一些新的证据，以证实Bejan的发明，该发明涉及在流动配置的演变中调用构造定律，以增强动量的传播和热量从壁面转移。利用判别量纲分析（DDA）和亨特利方法，解决了流体力学和对流传热中的几个新问题，为贝让的发明提供了佐证。已经证明，在沿垂直平面流动的自由流或在干燥、光滑的固体表面上扩散的液滴的瞬态排水时，流体体积的形状（不细长）是如何随着时间的推移而发展的，变得细长，类似于边界层的形状。当沿垂直等温壁面存在自然对流时，与具有动量扩散的流体体积同时产生另一种具有热扩散的流体体积。两种形状（结构与边界层）的巧合通过将笨重的形式（非细长的）转化为细长的形式被揭示出来。

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引用次数: 0

Investigation of soot growth in premixed flames with different polycyclic aromatic hydrocarbons using molecular dynamics simulation 不同多环芳烃预混火焰中烟尘生长的分子动力学模拟研究

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-13 DOI: 10.1016/j.icheatmasstransfer.2025.110308

Chenglin Gu , M. Hashemi

Molecular dynamics simulation helped elucidate how the molecular configuration of polycyclic aromatic hydrocarbons (PAHs) may affect soot growth in premixed flames. Pyrene and anthracene were selected as model PAHs to study how their molecular disposition may affect aggregation and such coalescence with the evolution of the particle itself. Hydrogen and ammonia (with a 20 % atomic ratio) were mixed into the reaction environment as dopants, mimicking real combustion conditions. Simulations were run for 20 ns in a constant temperature ensemble, with the first 10 ns used for system equilibration and the subsequent 10 ns for soot formation. During this period, both PAHs promoted soot nucleation and growth, although their structures influenced their aggregation tendencies. Anthracene, with its more elongated form and higher reactivity, was found to favor aggregation and coalescence into larger soot structures. In contrast, pyrene, with its compact aromatic structure, exhibited stronger intermolecular interactions, resulting in more stable soot clusters. The evolution of interaction energy, center of mass, and size of soot confirmed that the processes involved in the formation of bulkier and faster soot are those containing anthracene. Thus, the study confirmed that all topologies and aromaticities of PAH molecules are interconnected very strongly to both energetics and kinetics of soot formation; moreover, having important implications on the molecular scale on how structural differences between combustion intermediates take place about soot morphology formation, which can therefore provide valuable contributions for the development of cleaner combustion strategies and improved soot suppression models.

分子动力学模拟有助于阐明多环芳烃（PAHs）的分子构型如何影响烟尘在预混火焰中的生长。选择芘和蒽作为模型多环芳烃，研究它们的分子配置如何影响粒子本身的聚集和聚并。氢气和氨（原子比为20%）作为掺杂剂混入反应环境中，模拟真实的燃烧条件。在恒温系统中进行了20 ns的模拟，其中前10 ns用于系统平衡，随后的10 ns用于烟灰形成。在此期间，两种多环芳烃都促进了烟灰的成核和生长，尽管它们的结构影响了它们的聚集倾向。蒽具有较长的形状和较高的反应活性，有利于聚集和聚结成较大的煤烟结构。而芘由于其致密的芳香结构，其分子间相互作用更强，形成的烟灰团簇更稳定。相互作用能、质心和烟灰尺寸的演化证实了烟灰体积更大、速度更快的形成过程是那些含有蒽的过程。因此，该研究证实了多环芳烃分子的所有拓扑结构和芳香性都与烟灰形成的能量学和动力学密切相关；此外，在分子尺度上对燃烧中间体之间的结构差异如何影响烟尘形态形成具有重要意义，因此可以为开发更清洁的燃烧策略和改进烟尘抑制模型提供有价值的贡献。

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引用次数: 0

Enhanced cooling performance of HCPV modules using non-uniform wavy channel designs 采用非均匀波浪形通道设计提高HCPV模块的冷却性能

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-12 DOI: 10.1016/j.icheatmasstransfer.2025.110156

M. Khoshvaght-Aliabadi , Z. Chamanroy , A. Nasrolahzadeh , A. Feizabadi

This study proposes a refined cooling methodology for high-concentration photovoltaic (HCPV) systems by introducing channel-based structures with non-uniform wavy patterns whose amplitude gradually changes along the flow direction to improve heat dissipation. A validated three-dimensional numerical model is employed to evaluate the thermal and hydraulic characteristics, temperature uniformity, cell efficiency, net power output, and thermal stress under a concentration ratio of 1000. The results illustrate that the non-uniform designs significantly improve temperature uniformity, reducing the maximum cell temperature difference to as low as 4.0 °C, over 40 % better than their uniform counterparts. These configurations enhance overall thermal and hydraulic performance by up to 41.8 % and enhance temperature uniformity by up to 44.3 %. Designs with greater wave amplitude variation yield higher cell efficiency, net power output, and efficiency uniformity. At a coolant mass flux of 800 kg/m²·s, the design varying from 0.25 mm to 1.25 mm in wave amplitude boosts efficiency uniformity by 67.4 %. Moreover, non-uniform models starting with smaller initial amplitudes are more effective in mitigating thermal stress, achieving a 14.0 % reduction at this mass flux. These findings provide practical insights for advancing scalable and high-performance thermal management approaches in HCPV systems, contributing to energy efficiency and sustainability in solar technologies.

本研究提出了一种针对高浓度光伏（HCPV）系统的改进冷却方法，通过引入具有非均匀波浪图案的通道结构，其振幅沿流动方向逐渐变化，以改善散热。采用经过验证的三维数值模型，对浓度比为1000时的热工特性、温度均匀性、电池效率、净功率输出和热应力进行了评价。结果表明，非均匀设计显著提高了温度均匀性，最大电池温差降至4.0°C，比均匀设计提高了40%以上。这些配置将整体热工和水力性能提高了41.8%，温度均匀性提高了44.3%。具有较大振幅变化的设计产生更高的电池效率、净功率输出和效率均匀性。当冷却剂质量通量为800 kg/m2·s时，波动幅度在0.25 ~ 1.25 mm范围内变化的设计使效率均匀性提高了67.4%。此外，以较小的初始振幅开始的非均匀模型在缓解热应力方面更有效，在此质量通量下实现了14.0%的降低。这些发现为推进HCPV系统的可扩展和高性能热管理方法提供了实用的见解，有助于提高太阳能技术的能源效率和可持续性。

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引用次数: 0

Multi-physics field coupling simulation of oil shale SRV-heating of multi-volume-fractured horizontal well and vertical well production 油页岩多体积压裂水平井与直井srv加热多物理场耦合模拟

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2025-12-12 DOI: 10.1016/j.icheatmasstransfer.2025.110214

Jing-Shun Li , Ren-Shi Nie , Jingcheng Liu , Xiaohui Fan , Tao Zhang , Zhangxin Chen , Cong Lu , Fan-Hui Zeng

This paper presents a novel multi-physics coupling simulation framework for oil shale in-situ development, advancing previous models by integrating SRV heating, dynamic gas-phase properties, and preheating production scenarios. In the in-situ heating and pyrolysis development of oil shale, hydrocarbon flow is governed by a highly coupled “temperature-pressure-velocity-saturation” process. A fully-coupled multi-physics mathematical model was therefore established to simulate two-phase (oil–gas) flow in a “SRV heater–vertical well producer” well pattern. The model, implemented in COMSOL, incorporates real-time gas density calculation via the Peng-Robinson EOS and component-dependent heat capacity, addressing gaps in existing studies. The simulation elucidated the dynamic evolution of the temperature, pressure, velocity and saturation fields and quantified the resulting production-rate and cumulative production behaviors. Key findings are: (1) the formation temperature is non-uniform, being higher on the inner (inter-well) side of each heater well than on the outer side; (2) a local annular high-pressure zone forms on the outer flanks of the heaters where pyrolysis-derived hydrocarbons are impeded from escaping, enclosing a drainage pressure-depletion zone around the producer; (3) gravity deflects streamlines downward, causing them to bend radially towards the producer; (4) oil saturation decreases from the edge of the depletion zone to the producer, with higher values in the lower reservoir under gravitational segregation; and (5) both draw-down pressure and well spacing govern instantaneous and cumulative production. The results demonstrate the methodological robustness and provide a theoretical basis for efficient oil shale development, with insights into simulation-based optimization.

本文提出了一种新的油页岩原位开发多物理场耦合模拟框架，通过集成SRV加热、动态气相特性和预热生产场景，改进了以前的模型。油页岩原位加热热解发育过程中，油气流动受“温度-压力-速度-饱和度”高度耦合过程控制。因此，建立了一个完全耦合的多物理场数学模型来模拟“SRV加热-直井生产”井网中的两相（油气）流动。该模型在COMSOL中实现，通过Peng-Robinson EOS和组件相关热容量进行实时气体密度计算，解决了现有研究中的空白。模拟结果阐明了温度、压力、速度和饱和度场的动态演化，量化了由此产生的产量和累积生产行为。主要发现有：(1)地层温度不均匀，每口加热井的内侧（井间）温度高于外侧；(2)在加热器的外侧翼形成局部环形高压区，阻止热解衍生碳氢化合物逸出，在生产者周围形成排水压力耗尽区；(3)重力使流线向下偏转，使流线径向向生产者弯曲；(4)在重力偏析作用下，含油饱和度由枯竭带边缘向产油层逐渐降低，低储层含油饱和度较高；(5)压降压力和井距共同决定瞬时和累积产量。结果证明了该方法的稳健性，并为高效油页岩开发提供了理论基础，同时也为基于模拟的优化提供了见解。

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引用次数: 0