International Journal of Heat and Mass Transfer最新文献

{"title":"Damped harmonic oscillator framework for boiling acoustics: Insights from single vapor bubble experiments","authors":"Avinash Upadhyay,&nbsp;Soumya Kanti Hazra,&nbsp;Md Quamar Alam,&nbsp;Rishi Raj","doi":"10.1016/j.ijheatmasstransfer.2026.128508","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128508","url":null,"abstract":"<div><div>Bubbles are ubiquitous in natural and engineered systems and often serve as acoustic indicators of underlying physical processes. While the acoustics of gas bubbles have been extensively studied, the mechanisms of sound generation by vapor bubbles during boiling remain poorly understood. Here, we investigate passive acoustic emissions from single vapor bubbles during near-saturated pool boiling using synchronized audio–visual diagnostics and report—for the first time—the detailed acoustic signature of the ebullition cycle. We find that bubble departure is the dominant sound-emitting event, driven by necking-induced liquid inrush that excites radial oscillations—akin to Minnaert-like resonance observed in gas bubbles detaching from underwater nozzles. However, vapor bubbles produce weaker and lower-frequency broadband signals (300–500 Hz) compared to the sharp Minnaert peaks (&gt;1000 Hz) of gas bubbles of similar size. The vapor bubble emission range remains robust across variations in power input and persists in multi-bubble boiling, where overlapping departures and coalescence events add complexity without altering the dominant features. Analytical modeling reveals that existing formulations systematically overpredict both the natural frequency and damping of vapor bubbles, as they were derived for quiescent liquid pools. In realistic boiling, however, bubbles interact strongly with the surrounding flow field during departure, which enhances heat loss and reduces effective stiffness. To capture this effect, we propose a modified natural frequency relation that extends Prosperetti’s formulation by incorporating thermal convection in addition to evaporation–condensation. The resulting relation preserves the original parametric structure while introducing a convection parameter, <span><math><mi>S</mi></math></span>, which quantifies the relative importance of convective heat transfer. Once the dependence of <span><math><mi>S</mi></math></span> is determined by performing boiling experiments under varying pool conditions, the proposed formulation can serve as a unified relation for predicting boiling acoustics. Overall, this work presents a physics-based framework for boiling acoustics and provides a foundation for acoustic sensing and thermal management technologies.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"261 ","pages":"Article 128508"},"PeriodicalIF":5.8,"publicationDate":"2026-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Drag coefficients and Nusselt numbers of gas slip flow around unconfined and semi-confined spheres","authors":"Wei Dai,&nbsp;Zhenyu Liu,&nbsp;Huiying Wu","doi":"10.1016/j.ijheatmasstransfer.2026.128496","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128496","url":null,"abstract":"<div><div>This paper numerically investigates the drag coefficients (<em>C</em>_D) and Nusselt numbers (<em>Nu</em>) of gas slip flow around unconfined and semi-confined spheres using second-order velocity slip (with nonplanar modification) and temperature jump boundaries and variable gas properties. The effects of Knudsen number (<em>Kn</em>), Reynolds number (<em>Re</em>), gap ratio (<em>d</em>_gap/<em>d</em>_sp), and temperature ratio (<em>T</em>_sp/<em>T</em>_∞) are comprehensively analyzed. It is obtained that: (1) for the unconfined sphere, <em>C</em>_D decreases as <em>Kn</em> and <em>Re</em> increase due to the enhanced velocity slip and weakened viscous effect; for the semi-confined sphere, <em>C</em>_D decreases at lower <em>Kn</em> and <em>Re</em> but increases at higher <em>Kn</em> and <em>Re</em> due to the enhanced compressibility effect (<span><math><mrow><mi>M</mi><mi>a</mi><mspace></mspace><mrow><mo>=</mo><mspace></mspace></mrow><msqrt><mrow><mn>2</mn><mo>/</mo><mi>π</mi><mi>γ</mi></mrow></msqrt><mi>K</mi><mi>n</mi><mi>R</mi><mi>e</mi></mrow></math></span>); for both spheres, <em>Nu</em> decreases as <em>Kn</em> increases due to the dominant temperature jump, but increases as <em>Re</em> increases due to enhanced convection; for the semi-confined sphere, the enhanced compressibility effect changes the dominance from temperature jump to velocity slip. (2) <em>C</em>_D firstly rises and then declines with narrowing <em>d</em>_gap<em>/d</em>_sp due to the variation of velocity gradient when the sphere moves from outside to inside and last bottom of wall boundary layer; besides, with narrowing <em>d</em>_gap<em>/d</em>_sp, the confinement effect weakens the rarefaction effect but enhances the compressibility effect on <em>C</em>_D; <em>Nu</em> firstly rises and then declines and last rises with narrowing <em>d</em>_gap<em>/d</em>_sp due to the corresponding variation in temperature gradient; furthermore, the confinement effect shifts dominance from temperature jump to velocity slip and finally back to temperature jump with narrowing <em>d</em>_gap<em>/d</em>_sp; (3) for both spheres, <em>C</em>_D and <em>Nu</em> increase with increasing <em>T</em>_sp/<em>T</em>_∞ due to the rise in the gas viscosity, and gas temperature gradient and thermal conductivity, respectively. Consequently, <em>C</em>_D and <em>Nu</em> correlations of unconfined and semi-confined spheres are proposed considering effects of convection, rarefaction, compressibility, confinement, and temperature.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"261 ","pages":"Article 128496"},"PeriodicalIF":5.8,"publicationDate":"2026-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel numerical model for detailed simulation of CO2 capture","authors":"Sajad Jafari ,&nbsp;Ran Yao ,&nbsp;Salar Zamani Salimi ,&nbsp;Luca Brandt ,&nbsp;Christophe Duwig","doi":"10.1016/j.ijheatmasstransfer.2026.128416","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128416","url":null,"abstract":"<div><div>According to the Intergovernmental Panel on Climate Change, CO₂ capture using liquid absorbents is a key strategy for mitigating climate change. However, the energy footprint of the technique is still high and novel solutions are needed to design better units. To that end, this study presents a novel and detailed diffuse-interface model for interfacial mass and heat transfer coupled with chemical reactions for CO₂ capture. Two scalar transport equations describe the species evolution in each phase, coupled through a variable apparent Henry’s constant that captures non-ideal vapor–liquid equilibrium at the interface. Momentum and energy transport are modeled through single-scalar formulations, with interfacial velocity discontinuities arising from reactive phase change, handled via a Stefan condition. A conservative phase-field method closes the equations, with regularization applied to suppress numerical diffusion when tracking the interface. The model resolves key physical phenomena, including reaction kinetics, mass transfer resistance, H₂O phase change, and interfacial velocity jumps during both absorption and desorption. A sensitivity analysis shows that increasing the solvent mole fraction enhances chemical reactivity but increases diffusive resistance, inducing complex nonlinear effects on the interfacial reactive transport. The coupled CO₂ and H₂O interphase transport are captured simultaneously, with water evaporation shown to have limited impact on CO₂ uptake and on the interfacial reactive Stefan velocity for isolated droplets. Additionally, multi-droplet simulations demonstrate that the droplet number and an imposed gas-phase mean flow significantly affect absorption rates and spatial asymmetry through droplet-droplet interactions and convective transport. The findings offer critical insights into interfacial CO₂ transport in reactive, two-phase systems and supports the need for advanced numerical studies like the present one, given the lack of droplet-scale data and the limited applicability of bulk-scale experiments to localized transient interfacial processes.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"260 ","pages":"Article 128416"},"PeriodicalIF":5.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Parameter inversion of the concrete hydration heat source based on physics-informed neural network","authors":"Yahao Bu ,&nbsp;Binghan Xue ,&nbsp;Zhenhua Huang ,&nbsp;Musong Yang ,&nbsp;Zehan Zhang ,&nbsp;Cuiying Zheng","doi":"10.1016/j.ijheatmasstransfer.2026.128409","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128409","url":null,"abstract":"<div><div>Accurately characterizing the exothermic process of concrete hydration requires the proper determination of the hydration heat source function and its parameters. Conventional parameter identification methods require long-term experimental data and rely on data fitting or repeated calls to forward models for inversion, resulting in low efficiency and high costs. Within this study, a physics-informed neural network (PINN) framework is applied to parameter inversion of the concrete hydration heat source. In this framework, the residual of the heat conduction governing equation is computed through automatic differentiation and incorporated into the loss function as a physical constraint. By combining this physical constraint with observational data, a composite loss function is constructed, thereby enabling the simultaneous solution of forward modeling and parameter inversion within a unified framework. Using only the first three days of adiabatic temperature rise (ATR) data from different conventional concrete mix ratios, the proposed framework achieves robust inversion of the key parameters <em>a, b</em>, and the final ATR <em>θ</em>₀. The resulting temperature rise curves closely match the 28-day experimental data (R² &gt; 0.99), demonstrating superior performance over the genetic algorithm (GA) and the Levenberg-Marquardt (LM) methods. These results demonstrate that the PINN-based framework can reduce reliance on long-term experiments while maintaining high accuracy and robustness, helping address the time-consuming and costly nature of ATR experiments, providing a practical and efficient method for rapid inversion of parameters of the concrete hydration heat source.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"260 ","pages":"Article 128409"},"PeriodicalIF":5.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characteristics of ethanol natural evaporation in capillary tubes with multiple environmental conditions","authors":"Zhuorui Li ,&nbsp;Yali Guo ,&nbsp;Panagiotis E. Theodorakis ,&nbsp;Rachid Bennacer ,&nbsp;Bin Liu","doi":"10.1016/j.ijheatmasstransfer.2026.128403","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128403","url":null,"abstract":"<div><div>Capillary evaporation is crucial for applications such as microfluidics, microchannel heat exchange, and inkjet printing. However, predicting the behavior of such systems becomes challenging due to the coupling of flow characteristics and heat and mass transfer under the influence of environmental conditions. Currently, the effects of ambient conditions on the evaporation mechanisms within capillaries remain unclear. To fill this gap, ethanol evaporation in capillary tubes under combined external airflow and radiation was investigated experimentally and theoretically. Airflow velocity, radiation source temperature, and placement distance were systematically varied to quantitatively analyze their synergistic effects on the evaporation characteristics, including the evaporation rate, temperature gradient distribution, and flow pattern evolution. The findings demonstrate that during the initial rapid evaporation stage with pinned meniscus at the capillary mouth, increased airflow velocity and radiation source temperature significantly promoted evaporation, with airflow exhibiting stronger influence. As the meniscus receded deeper at later stages, radiative effect gradually increases. A simplistic heat transfer model was developed for the environmentally sensitive initial stage to distinguish the relative influence proportions. The model provided predictions in agreement with the experimental results. We find that airflow's influence proportion increased with velocity (from 82% to 99.7%), while radiation's increased with temperature and reduced distance (from 0.3% to 18%). Notably, radiation's influence proportion growth accelerated with rising temperature, highlighting its significance for enhanced heat transfer in capillary-confined liquids beyond certain thresholds. We anticipate that our work might provide guidance for optimizing microchannel heat transfer systems, such as lab-on-a-chip devices.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"260 ","pages":"Article 128403"},"PeriodicalIF":5.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental studies and large eddy simulations of TPMS-based effusion cooling","authors":"Yuli Cheng,&nbsp;Kirttayoth Yeranee,&nbsp;Yu Rao","doi":"10.1016/j.ijheatmasstransfer.2026.128417","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128417","url":null,"abstract":"<div><div>Triply periodic minimal surface (TPMS) lattices are attracting attention in industry for their outstanding thermal and mechanical performance. The present study investigates two TPMS-based effusion cooling designs, the Diamond and the Gyroid, at a lattice scale compatible with additively manufactured turbine blades, with a primary focus on downstream coolant coverage. Adiabatic cooling effectiveness, <em>η</em>, is measured using pressure sensitive paint, and the internal and external flow structures are discussed using large eddy simulation. Discharge coefficients are also measured to compare the flow resistance. Experiments show that the adiabatic cooling effectiveness of both TPMS designs increases as the injection ratio rises from 2.3% to 11.3% without jet lift-off. The area-averaged <em>η</em> values of the Diamond and the Gyroid lattices are up to 6 times and 4 times that of film cooling at high injection ratios, respectively. Additionally, the TPMS effusion cooling configurations provide at most 85% and 63% lower coolant pressure drops. The Diamond design significantly outperforms the Gyroid by 26% – 58% in adiabatic cooling effectiveness and 52% in discharge coefficient, highlighting the importance of structural design in lattice-based effusion cooling. LES results reveal that the coolant in the Diamond lattice undergoes “merge-split” cycles, which intensify momentum and heat transfer. Meanwhile, the external flow emerges as several counter-rotating vortex pairs that promote downstream lateral spreading into a continuous film. In the Gyroid lattice, the inherent through-holes result in high velocity and recirculation zones inside. The resulting flow shear generates strong turbulence, accelerating initial mixing, thereby limiting the cooling enhancement relative to the Diamond design and increasing flow resistance.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"260 ","pages":"Article 128417"},"PeriodicalIF":5.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study on the influence of convex structures of a single vertical fin on condensation and frosting under constrained airflow conditions","authors":"Yonghui Liang ,&nbsp;Mengjie Song ,&nbsp;Long Zhang ,&nbsp;Sirui Yu ,&nbsp;Qunbo Liu ,&nbsp;Jing Cheng","doi":"10.1016/j.ijheatmasstransfer.2026.128444","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128444","url":null,"abstract":"<div><div>Uniform frosting on the surface of finned heat exchangers in low temperature and high humidity environments can help alleviate the performance degradation of air source heat pumps. Traditional research has mostly focused on system defrosting strategies and optimization of surface wettability of fins, without paying attention to the study of uniform frosting on individual fins. This study proposes a new strategy aimed at inducing uniform frosting on fins by designing convex structures on the surface of the fins. Through systematic experimental observation, the influence of convex structures with different geometric shapes on the full cycle process of condensation and frost growth was studied. The research results indicate that due to the influence of edge effects and center temperature, droplets and frost on the surface of fins without convex structures are distributed in a W-shaped pattern along the airflow direction. At 60 minutes, the non-uniformity of condensate droplet coverage and frost thickness was 11.3% and 0.023 mm, respectively. The effect of inducing condensation and frosting was significant after adding the protruding structure, but it would block the leeward airflow and suppress condensation and frosting. The non-uniformity of droplet coverage of the vertical linear convex structure fins was reduced by 25.0%. After adding the edge convex structure, the gap is less likely to enter humid air, and the non-uniformity of frosting increases by 26.2%. This study can provide important theoretical basis and innovative technological path for the design and management of surface convex structures during frosting process.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"260 ","pages":"Article 128444"},"PeriodicalIF":5.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146076286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism of condensation heat transfer enhancement by secondary flow in curved tubes under microgravity","authors":"Zipei Su,&nbsp;Kejun Ou,&nbsp;Zhenhui He,&nbsp;Zhenrui Wang","doi":"10.1016/j.ijheatmasstransfer.2026.128410","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128410","url":null,"abstract":"<div><div>This study investigates the enhancement mechanism of condensation heat transfer in curved tubes under microgravity via three-dimensional numerical simulations of CO₂ flow condensation. A validated model integrating Volume of Fluid (VOF) method and Lee phase-change model was adopted to capture the vapor-liquid interface and simulate the condensation process. The results indicate that the liquid film distribution in curved tubes under microgravity is governed by the competition between centrifugal inertia and vapor-driven secondary flow. With increasing vapor velocity, the intensified secondary flow overwhelms centrifugal inertia, leading to \"liquid film inversion\" phenomenon, where the thick liquid film migrates from the outer to the inner wall of the bend. Comparative analysis with straight tubes demonstrates that the secondary flow in curved tubes drastically reduces the circumferential thermal resistance of the liquid film by inducing intense internal mixing and convection. This enhancement originates from two synergistic effects: first, the thinning of the liquid film on the outer wall, which intensifies interfacial condensation; second, the strengthened convective heat transfer within the liquid film on the inner wall. It is conclusively established that the vapor-phase secondary flow is the pivotal mechanism for heat transfer enhancement. Its intensity can be governed by vapor inertial forces and can be actively regulated by vapor quality, mass flux, and tube curvature. This work provides fundamental insights and theoretical support for the design of high-performance condensers in two-phase thermal management systems of spacecraft.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"260 ","pages":"Article 128410"},"PeriodicalIF":5.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146015848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the influence of mineral heterogeneity and temperature on acid–rock reaction behavior in mixed sedimentary reservoirs","authors":"Pingli Liu ,&nbsp;Zhongxuan Wang ,&nbsp;Xiang Chen ,&nbsp;Juan Du ,&nbsp;Xu Yang ,&nbsp;Haoze Yue ,&nbsp;Hongming Tang ,&nbsp;Qisheng Huang ,&nbsp;Zhaoxu Deng","doi":"10.1016/j.ijheatmasstransfer.2026.128485","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128485","url":null,"abstract":"<div><div>Mixed sedimentary rocks present considerable challenges for petroleum and geothermal resource development due to their strong heterogeneity. Acidizing is an effective stimulation technique to enhance the productivity of such reservoirs. To investigate the impact of rock heterogeneity on matrix acidizing performance, this study assumes the coexistence of carbonate and non-reactive minerals within each mesh and constructs three mineral distribution models: uniform, banded, and blocky. Based on a coupled thermo–hydro–chemical two-scale model, the effects of mineral composition, mineral distribution, temperature, and reaction heat on wormhole development in mixed sedimentary rocks are systematically analyzed. The results show that the content of non-reactive minerals significantly affects acidizing efficiency. A high content reduces efficiency, whereas a low content suppresses branching and lowers acid consumption. Mineral distribution patterns strongly influence wormhole morphology and acidizing efficiency. Uniform distributions promote branching and higher acid consumption, while banded patterns favor dominant channels, with the breakthrough pore volume (PV_bt) reduced by 46 % compared with the uniform distribution. In blocky distributions, acidizing efficiency is more sensitive to the injection rate. Initial wormhole formation near the wellbore is mainly controlled by the original permeability, while mineral distribution governs the selection and branching of dominant wormholes. Temperature exerts a limited effect on dissolution patterns. However, increasing temperature accelerates wormhole growth and branching, thereby reducing acidizing efficiency, while higher injection rates can mitigate this effect. The influence of reaction heat on PV_bt decreases with increasing temperature. In low-temperature reservoirs, reaction heat enhances local temperature and reaction rate, resulting in a 9.3 % reduction in PV_bt. Moreover, reaction heat significantly alters the reservoir thermal field, raising the overall temperature by approximately 10 °C and forming high-temperature zones around wormhole walls and tips. This study provides useful insights for optimizing acidizing treatments in mixed sedimentary reservoirs.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"260 ","pages":"Article 128485"},"PeriodicalIF":5.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-dimensional multi-step time-domain function method for online inverse heat conduction problem in thick-walled components","authors":"Jiangping Li ,&nbsp;Liping Pang ,&nbsp;Siyu Li","doi":"10.1016/j.ijheatmasstransfer.2026.128467","DOIUrl":"10.1016/j.ijheatmasstransfer.2026.128467","url":null,"abstract":"<div><div>This paper develops a new time-domain decomposition strategy, referred to as the low-dimensional multi-step time-domain function method (LD-MSTFM), which can be combined with a layer-wise approach to solve the inverse heat conduction problem (IHCP) in thick-walled components. Reconstructing the temperature field in thick-walled components is extremely challenging: the outer-wall temperature is only weakly sensitive to variations in the inner-wall heat flux, while measurements in industrial environments are typically contaminated by substantial noise. For sufficiently thick walls, gradient-based inverse algorithms may even fail to converge. To address these difficulties and to meet the requirement for online monitoring of thick-walled components, a layer-wise strategy is adopted. However, numerical investigations demonstrate that the classical time-domain decomposition technique, i.e., the sequential function specification method (SFSM), cannot be applied within the layer-wise strategy for thick-walled IHCPs. The reasons for this computational incompatibility are analyzed in detail in this paper, and the low-dimensional parameterization concept of SFSM is then extended to formulate a new time-domain decomposition scheme tailored to the layer-wise approach, namely LD-MSTFM. The LD-MSTFM is validated through both numerical simulations and physical experiments. The results demonstrate that LD-MSTFM can effectively solve the IHCP for thick-walled components under noisy measurement conditions. Further development of LD-MSTFM is expected to provide a practical route toward ultimately resolving the IHCP in thick-walled components for online monitoring applications.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"260 ","pages":"Article 128467"},"PeriodicalIF":5.8,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147385795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}