International Communications in Heat and Mass Transfer最新文献

{"title":"A numerical investigation of droplet bouncing behaviors on dual micro-structured superhydrophobic surfaces","authors":"Sirui Lu ,&nbsp;Hao Lu ,&nbsp;Wenjun Zhao ,&nbsp;Zhibo Xiao","doi":"10.1016/j.icheatmasstransfer.2025.109384","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109384","url":null,"abstract":"<div><div>An in-depth study of the droplet bouncing behavior and microscopic mechanism on superhydrophobic surfaces containing different micro-structures is of great significance in the power production and transmission fields. In this study, the lattice Boltzmann method with multiple relaxation times (LBM-MRT) was used to investigate the droplets bouncing process on superhydrophobic surfaces. Three groups of novel superhydrophobic surface microstructures were developed based on the protrusion/recess dimensions of columnar structures and the distribution positions of randomly rough microstructures. All randomly rough micro-structures were characterized by skewness (−1.1 to 1.1), kurtosis (1.0 to 5.0) and standard deviation (0.3 to 1.1). The basic morphology and roughness parameters of the randomly rough micro-structures were extracted using atomic force microscopy (AFM). In turn, the various types of surfaces required for numerical simulations were obtained by numerical reconstruction methods. Use liquid-gas density ratios of 800 and gas-liquid dynamic viscosity ratios of 10, which are extremely close to the corresponding parameters for air and water. After experimental validation, the droplet bouncing dynamics were compared and summarized. The maximum spreading length, total contact time and post-bounce morphology of the droplets during the bouncing process were analyzed. The results shown that column with a spacing of 30 μm was able to produce the maximum radial spreading tendency of the droplets. On the P-R-R surface, the increase in the columns spacing reduced the drop rate of total contact time from 9.04 % to 5.89 % and then increased to 7.35 %. Droplets bounced best on surfaces with relatively uniform overall morphology and relatively fewer excessive spikes and deep valleys. The specific parameter ranges satisfy skewness −0.5 to 0.3, kurtosis 3.0, and standard deviation 0.3 to 0.5. Based on data of droplets bouncing on typical surfaces, we also summarize empirical equations for the relationship between maximum spreading length and total contact time and skewness. The regularities obtained in this paper on the effect of dual micro-structures on the dynamic behavior of droplets may contribute to the in-depth optimization of superhydrophobic surfaces.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109384"},"PeriodicalIF":6.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655062","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 physics-informed neural network-enhanced material point method for regression and heat transfer modeling of solid propellant","authors":"Geng Xu ,&nbsp;Lu Liu ,&nbsp;Jieyao Lyu ,&nbsp;Dian Shao ,&nbsp;Rong Ma ,&nbsp;Peijin Liu ,&nbsp;Wen Ao","doi":"10.1016/j.icheatmasstransfer.2025.109320","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109320","url":null,"abstract":"<div><div>In this study, we introduce a Material Point Method (MPM) for simulating the regression process of solid composite propellants. By employing a physics-informed neural network for solving gas-phase chemical reactions combined with a novel gas–solid coupling approach, our method accurately models the propellant burning rate while capturing complex solid-phase interface morphologies under various pressures. Traditional MPM, typically employed for large deformation simulations, is enhanced by our heuristic, data-driven approach, enabling predictive combustion modeling. Simulations of pure AP, AP/HTPB sandwich configurations, AP/HTPB-packed propellants, and AP-packed propellants with different AP size distributions revealed non-steady state burning rates with inherent oscillations. Our results showed <span><math><mo>&lt;</mo></math></span>10% error below 4 MPa and <span><math><mo>&lt;</mo></math></span>20% error between 4–7 MPa compared to experimental data. Fine thermocouple measurements of surface temperatures showed <span><math><mo>≤</mo></math></span>15% deviation from experimental results, thereby validating the model’s predictive capability. The method’s multi-physics tracking capability enables accurate simulation of complex interface morphologies, including low-pressure adhesive layer depressions and high-pressure protrusions in sandwich propellants, as well as subsurface structures in AP spherical packed configurations. This research provides a new method for predicting the burning rate and interface morphology of composite propellant combustion, with future work aimed at refining energy balance algorithms and parameter settings based on experimental insights.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109320"},"PeriodicalIF":6.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655032","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 investigation of heat transfer enhancement with radially arrayed delta winglets in a heat exchanger tube","authors":"Md. Islam ,&nbsp;A. Nurizki ,&nbsp;Nader Ayish ,&nbsp;Md. Mahbub Alam ,&nbsp;Valerie Eveloy ,&nbsp;J. Alvarado","doi":"10.1016/j.icheatmasstransfer.2025.109357","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109357","url":null,"abstract":"<div><div>Delta winglets are one of the promising and effective vortex generators (VGs) for enhancing heat transfer, with a low pressure drop penalty. This research is concerned with innovative arrangements (inline, staggered, mixed configurations) of delta winglet vortex generators (VGs) inside a circular tube to investigate their effects on thermal and flow characteristics. The VGs were arranged inside a tube as a series of four rings. Each ring had four winglets on the inner surface of the tube. Experimental measurements with VG inserts were conducted for fully developed turbulent air flows with Reynolds numbers between 6000 and 27,000 under a constant heat flux condition on the surface of the tube. The experimental results show that delta winglets with different arrangements lead to significant thermal performance enhancement. Using the staggered configuration instead of inline configuration of the VGs resulted in a significant drop in friction factor (6 %) and a significant increase in Nusselt number (16 %). Compared to the inline configuration, staggered configurations of VGs provided better heat exchanger performance. The highest Thermal Performance Enhancement (TPE) obtained, 1.33, was achieved using mixed VG directions with a staggered VG arrangement (i.e., configuration referred to as RZ1). The effects of VG length, rotational direction, and inward and backward positions of VGs on thermal performance were also characterized. Rotational directions (positive and negative) were found to have a positive impact on the Nusselt number (<em>Nu</em>) and a small effect on the friction factor (<em>f).</em> Increasing the length of the VGs resulted in an increase of <em>f</em> and <em>Nu</em>. This study suggests that innovative layouts/arrangements of VGs can contribute to the development of high-performance heat exchangers.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109357"},"PeriodicalIF":6.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655033","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":"Microscale integration of thermal, chemical, and mechanical boundaries for the prediction of macroscale barrel erosion","authors":"Shuli Li ,&nbsp;Guolai Yang ,&nbsp;Liqun Wang ,&nbsp;Shuqing Xia","doi":"10.1016/j.icheatmasstransfer.2025.109374","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109374","url":null,"abstract":"<div><div>Quantifying the erosion features and predicting the service life of the barrel are important steps in the development of intelligent artillery. The thermal, chemical and mechanical conditions of the barrel during the launching process are determined using the two-phase flow interior ballistics and experimental tests. On this basis, the calculation methods for barrel erosion at the macroscale and cross-scale are presented. Finnie erosion theory and near-ellipsoid hypothesis are used to model the macroscale erosion, and molecular dynamics, dislocation dynamics and agent models are used to model the cross-scale erosion. The high temperatures exceeding 2800 K, the complex chemical reactions and the mechanical impacts exceeding 400 m/s determine that the macroscale method cannot accurately obtain material parameters and quantify erosion features. However, the cross-scale method unifies the thermal, chemical and mechanical conditions at the microscale, characterizes material plasticity and crack propagation at the mesoscale, and accurately quantifies erosion features at the macroscale. Finally, the comparison between the experimental results and the calculations from the two methods further confirms the accuracy of the cross-scale method in quantifying the barrel erosion.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109374"},"PeriodicalIF":6.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662778","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":"Boosting energy storage and recovery in shell-and-multitube latent heat storage systems through sunburst-distributed radial fins","authors":"Mohamed Ahmed Said ,&nbsp;Hakim S. Sultan Aljibori ,&nbsp;Azher M. Abed ,&nbsp;Hussein Togun ,&nbsp;Hayder I. Mohammed ,&nbsp;Jasim M. Mahdi ,&nbsp;Pouyan Talebizadehsardari ,&nbsp;Nidhal Ben Khedher","doi":"10.1016/j.icheatmasstransfer.2025.109360","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109360","url":null,"abstract":"<div><div>The worldwide need for sustainable energy solutions requires the improvement of latent heat thermal energy storage (LHTES) systems for efficient thermal response. This comprehensive study examines the impact of employing new sunburst-distributed radial fins on the thermal efficiency of phase change material (PCM) inside the shell-and-multitube LHTES system. The main goal is to address the intrinsic poor thermal conductivity of the PCM, which constrains energy charging and discharging rates. A two-dimensional model was developed employing the finite-volume method and the enthalpy-porosity approach to simulate the melting and solidification of PCM. The model was tested using experimental data from relevant literature. The effects of alerting the fin geometrical parameters, including the number, length, and distribution were parametrically quantified and reported. The results reveal that the new sunburst-distributed radial fin configuration can substantially surpass traditional fin configurations. The findings indicate that augmenting the fin count from 4 to 8 reduces the melting duration by 40.5 % and improves the heat retention rate by 71.5 %. Lengthening the fins saves solidification time by 48.1 % and enhances heat recovery rate by 91.6 %. The innovative sunburst-distributed radial fin arrangement (Case 7) cuts the melting time by 19.14 % and enhances heat storage capacity by 21.57 % vs to conventional long-fin designs. These findings significantly advance LHTES system design, offering quantitative insights into optimizing fin geometry for enhanced thermal performance.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109360"},"PeriodicalIF":6.4,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655056","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":"Analysis of the characteristics of an air bubble de-icing system under different cold environments","authors":"Zhongxin Liu,&nbsp;Xuan Zhang,&nbsp;Long Zhang,&nbsp;Zekang Zhen,&nbsp;Yonghui Liang,&nbsp;Mengjie Song","doi":"10.1016/j.icheatmasstransfer.2025.109377","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109377","url":null,"abstract":"<div><div>To counteract the negative effects that icing on the water surface in winter may have on the normal navigation of ships, a simple and reliable bubble de-icing system can be utilized to melt the ice by impacting the ice with an underwater bubbly flow. The cold environment above the ice affects the melting process and should be taken into account. An experimental set-up is built to investigate the effect of the cold environment and a melting model for a bubble de-icing system is developed. The ice-water interface gradually forms a peak-like shape with a central bulge and then tends to stabilize, with a change ratio of less than 10% within 180 s after <em>t</em> = 540 s in the deviation of the melting height and the heat transfer coefficient. Comparing the melting height calculated by the melting model with the experimental data, the error is around 5%. The balanced height of the ice in the balanced stage increases significantly with the increase of air speed and the decrease of air temperature. The results of the study are expected to provide a reference for the optimization and practical application of the bubble de-icing system.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109377"},"PeriodicalIF":6.4,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655059","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":"Comprehensive modeling and experimental validation of polymer desiccant wheels across global operating and design ranges: A comparative study of effectiveness and multilayer perceptron models","authors":"Zheng Qian,&nbsp;Zhiwei Wang,&nbsp;Hui Zhang,&nbsp;Shangkuan Yang,&nbsp;Xuemei Zhang","doi":"10.1016/j.icheatmasstransfer.2025.109376","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109376","url":null,"abstract":"<div><div>Accurately predicting the behavior of polymer desiccant wheels across coupled operating and geometric domains is essential for building-level simulations. This study establishes three models—constant effectiveness (CE), adaptive multi-grid effectiveness (AMGE), and a hyper-parameter-tuned multilayer perceptron regressor (MLP_R)—that map ten inputs (inlet air states, face velocity, wheel speed, and key geometric parameters such as wheel-area ratio, diameter, and depth) to the outlet process-air conditions. The models are trained on an extensive manufacturer dataset and validated against independent experiments that satisfy mass- and energy-balance criteria within ±5 %. Global sensitivity analysis reveals moderate pairwise correlations but strong nonlinear coupling among the inputs, underscoring the need to treat operation and design as an integrated space. The AMGE model reproduces every training sample exactly and limits experimental relative errors to −5.3 % for temperature and 9.8 % for humidity. The MLP_R achieves coefficients of determination of 0.5820 for temperature and 0.7900 for humidity, whereas the CE model attains 0.4863 and 0.7901, respectively. These results show that the AMGE approach provides a fast, geometry-aware surrogate. Its superior performance therefore holds promise for robust design, adaptive control, and energy optimization of next-generation desiccant air-conditioning systems.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109376"},"PeriodicalIF":6.4,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655047","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 coupling mechanism between dispersed fuel flow and central thermal field","authors":"Simin Ren,&nbsp;Zhongqi Wang,&nbsp;Qi Zhang","doi":"10.1016/j.icheatmasstransfer.2025.109372","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109372","url":null,"abstract":"<div><div>During the dispersion of liquid fuel, the high-intensity energy field released by central charge detonation can easily trigger premature-ignition of the fuel cloud, leading to the early release of chemical energy and weakening the destructive power of detonation. In this paper, a dynamic temperature field calculation model based on specific internal energy during central charge detonation is proposed, achieving a relative error of less than 1.3 %–1.9 % compared to experimental values and effectively capturing transient temperature fields. Using this model, the temperature field and its coupling with the concentration distribution of the dispersed fuel cloud in a Fuel Air Explosive (FAE) device were obtained. It is shown that when the detonation products temperature exceeds the ignition temperature of propylene-oxide (693.15 K) and the fuel cloud concentration falls within the sensitive range of 72–959 g/m³, local mixed zones can initiate self-sustained combustion through the synergistic effects of heat conduction and droplets evaporation. Accordingly, a combustion initiation mechanism and a premature-ignition prediction model for the fuel dispersion process are proposed. Furthermore, a hazard classification of the spatiotemporal regions prone to premature-ignition was conducted. These insights provide important guidance for improving fuel utilization efficiency and enhancing the power of FAE.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109372"},"PeriodicalIF":6.4,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655046","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":"Dynamic wetting behavior of soluble surfactant-laden droplets under shear: A phase field based lattice Boltzmann method","authors":"Liping Yao ,&nbsp;Tao Chen ,&nbsp;Peiyu Wang ,&nbsp;Liangqi Zhang ,&nbsp;Zhong Zeng ,&nbsp;Hao Liu","doi":"10.1016/j.icheatmasstransfer.2025.109358","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109358","url":null,"abstract":"<div><div>Surfactants can reduce the surface tension of fluid interface and significantly change the wetting characteristics, demonstrating versatility in droplet manipulations. In this work, a phase field based lattice Boltzmann method (PF-LBM) is employed to investigate the dynamics behavior of soluble surfactant-laden droplets on solid surfaces subjected to a linear shear flow. We propose to extend the Yokoi dynamic contact angle model to the scenarios containing surfactant effects. Comparisons between the Yokoi model with the Young equation-based model demonstrate that the dynamic contact angle predicted by the Young equation-based model remains constant on the neutral surface. It implies that the Young equation-based model has limitations in accurately describing the dynamics behavior of droplet with soluble surfactant. By contrast, the Yokoi model reproduces more reasonable dynamic variation of contact angle, demonstrating good universality and reliability. Furthermore, we employ the Yokoi model to further investigate the shearing behavior of soluble surfactant-laden droplets, focusing on the influence of surfactant concentration on droplet deformation and identifying the critical conditions for droplet rupture. The results reveal that for a certain effective capillary number (Ca_e), there exists a critical surfactant concentration, beyond which the droplet rupture occurs. Moreover, the critical surfactant concentration for droplet rupture decreases monotonically with increasing Ca_e.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109358"},"PeriodicalIF":6.4,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655054","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":"Coupled heat and mass transfer analysis inside peak regulation LNG vaporizer with porous flow guiding device","authors":"Hao Zheng,&nbsp;Yun Guo,&nbsp;Jiaao Zhu,&nbsp;Xuning Zhang,&nbsp;Wenlong Li,&nbsp;Yunlong Guan","doi":"10.1016/j.icheatmasstransfer.2025.109336","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109336","url":null,"abstract":"<div><div>In the application of natural gas industry, the flexible adjustment of load needs the support of peak regulation vaporization equipment. The vaporizer presented in this paper can be widely used in areas not yet connected to the natural gas pipeline network, and can undertake emergency gas supply tasks for different demand levels. Since this vaporizer uses natural gas combustion as a heat source, there is an urgent need to improve the efficiency of heat utilization. Machining some holes in the flow guiding device is an effective way to increase the efficiency of heat utilization. Therefore, in this study, the heat and mass transfer model of gas-liquid jet entrainment droplet is established and the coupled thermal flow field with different opening rate (0 %, 20 %, 25 %, 30 %) porous flow guiding device is analyzed. Unlike the previous studies that only considered convective heat transfer, the radiative heat transfer factor is also considered in this study. Numerical results show that the proportion of radiative heat transfer can reach 16.9 % under the non-opening condition, indicating that the radiation effect is essential. The proportion of total heat transfer and radiant heat transfer can be increased by using the porous flow guiding device. Compared with non-opening condition, the total heat transfer increases by 19.03 % in the case of 25 % opening rate, and the proportion of radiation heat transfer increases by 14.72 %.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"167 ","pages":"Article 109336"},"PeriodicalIF":6.4,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655057","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}