International Communications in Heat and Mass Transfer最新文献_第5页

New method for evaluating the influence of the cooling gallery shape on the heat load of piston

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-23 DOI: 10.1016/j.icheatmasstransfer.2025.108887

Peiyou Xiong , Zhenqian Mu , Mengmeng Li , Lijun Deng , Yanpeng Chen , Xinqi Qiao , Lei Shi

{"title":"New method for evaluating the influence of the cooling gallery shape on the heat load of piston","authors":"Peiyou Xiong , Zhenqian Mu , Mengmeng Li , Lijun Deng , Yanpeng Chen , Xinqi Qiao , Lei Shi","doi":"10.1016/j.icheatmasstransfer.2025.108887","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108887","url":null,"abstract":"<div><div>One of the most effective methods for reducing the thermal load on pistons is the utilization of cooling galleries. Although extensive research on the heat transfer properties of new cooling gallery structures piston head failures continue to occur frequently in highly reinforced diesel engines. Using the cooling gallery of a specific diesel engine model as a baseline, its shape is altered by manipulating the hydraulic diameter. The transient fluid flow in the cooling gallery is analyzed using Fluent simulation software, while the temperature field of the piston is assessed using ANSYS. Additionally, visual experiments were performed on the piston's basic shape using a dedicated experimental platform, with temperatures at critical locations on the piston head measured via a temp-plug experiment. The effectiveness of the simulation results is demonstrated through a comparison with experimental data. Simulation results for various cooling gallery shapes are compared based on fluid flow characteristics, viscous boundary layer thickness, and Weber number. This study proposes a method for rapidly assessing the heat transfer effectiveness of the cooling gallery using hydraulic diameter and heat transfer coefficient as criteria. Results indicate that fluid flow in the wave-shaped cooling gallery is relatively stable, and fluid erosion on the walls is consistent, resulting in optimal heat transfer effectiveness.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108887"},"PeriodicalIF":6.4,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681315","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}

引用次数: 0

An entropy-based random-walk model for predicting in-plane thermal conductivity of porous media

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-23 DOI: 10.1016/j.icheatmasstransfer.2025.108862

Alireza Khademiyan , Behzad Baghapour , Mahmoud Momtazpour , Goodarz Ahmadi

{"title":"An entropy-based random-walk model for predicting in-plane thermal conductivity of porous media","authors":"Alireza Khademiyan , Behzad Baghapour , Mahmoud Momtazpour , Goodarz Ahmadi","doi":"10.1016/j.icheatmasstransfer.2025.108862","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108862","url":null,"abstract":"<div><div>In this study, we propose a random-walk model to estimate the in-plane thermal conductivity of porous media within a two-component, two-dimensional domain. An entropy-weighted procedure guides random walkers to explore a heterogeneous domain composed of distinct thermal properties by using independently injected thermal particles. This entropy-based random-walk (ERW) model was validated against several synthetic domains using numerical simulations and theoretical models. Our results demonstrate that the proposed model aligns with the Shannon–H theorem, exhibiting maximal entropy properties. The ERW model showed acceptable precision compared with the theoretical and numerical models. In some geometries, the model closely matched the numerical simulations, whereas in others, it aligned with the theoretical predictions. Connection between the ERW model and weighted harmonic mean model is discussed. Furthermore, the accuracy of the ERW model was tested using real applications with scanning electron microscopy (SEM) images and experimental measurements. A comparison between the ERW model and classical finite-volume method highlights the advantages of the proposed approach in heterogeneous domains with high conductance ratios, where finite-volume model convergence is hindered. To enhance the simulations, a multithreaded parallelized version of the ERW simulations was developed for the CPU platform, which is particularly effective for large numbers of particles.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108862"},"PeriodicalIF":6.4,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681313","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}

引用次数: 0

Convective heat transfer enhancement through additively built multiscale micro-tetrahedron features

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-22 DOI: 10.1016/j.icheatmasstransfer.2025.108888

Vanshika Singh , Fred List III , Chase Joslin , Paul Brackmann , S.S. Babu , M.M. Kirka

{"title":"Convective heat transfer enhancement through additively built multiscale micro-tetrahedron features","authors":"Vanshika Singh , Fred List III , Chase Joslin , Paul Brackmann , S.S. Babu , M.M. Kirka","doi":"10.1016/j.icheatmasstransfer.2025.108888","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108888","url":null,"abstract":"<div><div>Use of Additive Manufacturing (AM) to improve the heat transfer characteristics of tip shrouds in high-pressure turbines is being considered by industries. Existing designs of these components integrate micro-cooling channels to reduce the bulk temperature for improved life. In this research, closely packed micro tetrahedron features in addition to AM roughness has been considered. This multiscale surface characteristics increased surface area per unit volume available for heat exchange. Micro-tet features were designed, manufactured, characterized, and evaluated systematically while increasing their height. An enormous increase in the overall wetted surface area by 200 % was measured. The convective heat transfer enhancement was ∼3.72 times EDM rough coupon, and friction factor enhancement was ∼5.5 times EDM rough coupon. Furthermore, the proposed design offers 2.5 times enhanced heat transfer for a given 2 W pumping power compared to our EDM rough coupon. Heat transfer enhancement was observed to not vary strongly with increased Reynolds number. Such complex designs are only possible through additive manufacturing for increased heat transfer with little pressure penalty. Finally, increasing the micro-tet height for increased surface area and improved heat exchange beyond an upper limit might not be a significant benefit as it gets compensated by increasing skin friction.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108888"},"PeriodicalIF":6.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681312","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}

引用次数: 0

A novel 4E-based optimization framework for circular biomass multi-generation systems integrating NSGA-II and ANN to enhance resource efficiency and sustainability

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-22 DOI: 10.1016/j.icheatmasstransfer.2025.108849

Alireza Daneh-Dezfuli, Mohamad Ghanad-Dezfuli, Maziar Changizian

{"title":"A novel 4E-based optimization framework for circular biomass multi-generation systems integrating NSGA-II and ANN to enhance resource efficiency and sustainability","authors":"Alireza Daneh-Dezfuli, Mohamad Ghanad-Dezfuli, Maziar Changizian","doi":"10.1016/j.icheatmasstransfer.2025.108849","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108849","url":null,"abstract":"<div><div>This study explores an innovative multi-generation energy system designed to improve resource efficiency and promote environmental sustainability. The proposed system relies on biomass as its primary energy source and integrates five main components: a gasification unit, a Brayton cycle, a Rankine steam cycle, an absorption chiller, and a multi-effect desalination unit with thermal vapor compression. Unlike conventional systems, this approach enables the simultaneous production of electricity, heating, cooling, and freshwater from a single renewable source, maximizing energy utilization while reducing carbon dioxide emissions. A comprehensive assessment was conducted from thermodynamic, economic, and environmental perspectives. The study identifies gasification and combustion as the major sources of exergy destruction, impacting overall system performance. To improve efficiency, a heat recovery unit was introduced, leading to a 37 % reduction in carbon dioxide emissions. The system was optimized using a multi-objective genetic algorithm, considering exergy efficiency, energy cost rate, and carbon emissions as key criteria. Under optimal conditions, the system achieved an exergy efficiency of 31.96 %, with compressor pressure ratio and combustion chamber temperature identified as the most critical factors influencing cost. In terms of energy production, the system generated 5830 kW of electricity, with 71 % derived from biomass and 29 % from the heat recovery unit. These findings highlight the potential of biomass-based multi-generation systems as a sustainable solution for addressing rising energy demands while reducing environmental impact.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108849"},"PeriodicalIF":6.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681311","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}

引用次数: 0

Numerical analysis of saturated steam injection effects on steam turbine performance considering condensation losses and turbine stage efficiency

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-22 DOI: 10.1016/j.icheatmasstransfer.2025.108876

Leyla Iraj , Mahdi Tamimi , Ali Jahangiri , Mohammad Ameri , Mohammad Akrami

{"title":"Numerical analysis of saturated steam injection effects on steam turbine performance considering condensation losses and turbine stage efficiency","authors":"Leyla Iraj , Mahdi Tamimi , Ali Jahangiri , Mohammad Ameri , Mohammad Akrami","doi":"10.1016/j.icheatmasstransfer.2025.108876","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108876","url":null,"abstract":"<div><div>Steam turbines play a crucial role in electricity production, and any enhancement in their performance can significantly reduce energy losses. During operation, steam expands in the low-pressure sections of the turbine where supercooling, can lead to non-equilibrium condensation (NQC), transforming the flow into a two-phase state. This NQC, an irreversible phase change, results in the formation of liquid droplets, which reduce efficiency, cause blade wear, and lead to mechanical damage. This study proposes the use of a saturated steam injection technique to mitigate the detrimental effects of the liquid phase on steam turbine blades. Given the high energy content of hot steam, saturated steam is selected for injection. Initially the effects of this technique on parameters such as pressure, temperature, and Mach number are examined. Subsequently, its impact on nucleation, droplet radius, liquid mass fraction (LMF), turbine stage efficiency (TSE), and condensation losses is analyzed. The results show that the saturated steam injection technique effectively reduces the liquid phase in the flow. However, it also reduces the TSE due to flow disturbance. Optimization of saturated steam injection parameters reveals that injecting steam at specific conditions (location 3, saturation pressure 140 kPa, injection slot width 0.09, inlet length and angle 90 degrees) results in a reduction in, LMF, condensing losses and vane inlet flow by (22.82 %, 23.69 % and 1.5 %, respectively).</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108876"},"PeriodicalIF":6.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical study and geometric structure optimization on casing tube for R290 using response surface method

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-22 DOI: 10.1016/j.icheatmasstransfer.2025.108879

Jinfeng Wang , Chao Zeng , Shenglin Zhu , Jing Xie , Qing Zhang , Guosen Ye , Jilin Jiang , Xinrong Han

{"title":"Numerical study and geometric structure optimization on casing tube for R290 using response surface method","authors":"Jinfeng Wang , Chao Zeng , Shenglin Zhu , Jing Xie , Qing Zhang , Guosen Ye , Jilin Jiang , Xinrong Han","doi":"10.1016/j.icheatmasstransfer.2025.108879","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108879","url":null,"abstract":"<div><div>Three types of casing tube heat exchangers for R290 are studied in this paper. The corrugated tube with grooves is a novel heat exchange tube and its heat transfer and pressure drop characteristics have not been studied. Based on CFD, an investigation is conducted into heat transfer and pressure drop of R290 during flow boiling, and performance evaluation criteria (PEC) serves to assess performance of tube. The results show that PEC value of corrugated tube with grooves is higher than that of both smooth tube and circular corrugated tube. The performance of corrugated tube with grooves is further studied in this paper, and influence of three geometric structure parameters on heat transfer and pressure drop is explored. By using response surface method (RSM), the significance of the three parameters is obtained. The results reveal that groove number has the most significant impact on PEC of corrugated tube with grooves. Under given working conditions, with constant tube diameter, tube length, corrugation width and wall thickness, the optimal geometric parameters are obtained: groove number A = 10, corrugation height B = 0.3 mm, and corrugation spacing C = 5 mm. And PEC value of the optimized tube can be up to 1.848.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108879"},"PeriodicalIF":6.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681418","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}

引用次数: 0

Numerical simulation study on heat transfer enhancement by longitudinal fins attached to the outer surface of horizontal tubes in seawater distiller

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-21 DOI: 10.1016/j.icheatmasstransfer.2025.108762

Wen-Jing Xie , Hong-Cheng Pan , Zhi-Li Chen

{"title":"Numerical simulation study on heat transfer enhancement by longitudinal fins attached to the outer surface of horizontal tubes in seawater distiller","authors":"Wen-Jing Xie , Hong-Cheng Pan , Zhi-Li Chen","doi":"10.1016/j.icheatmasstransfer.2025.108762","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108762","url":null,"abstract":"<div><div>Tubular distillation desalination is one of the most promising thermal desalination methods. The addition of fins outside the tube can improve the heat transfer performance of the desalination units. This paper focuses on optimizing the design of structural parameters of the fin outside the tube of tubular desalination is optimized by numerical simulation. The results indicate that: The overall heat transfer coefficient is most significantly influenced by fin quantity, followed by fin height, with input temperature having the least impact. The overall heat transfer coefficient initially increases and then decreases with rising fin quantity, peaking at 5–7 fins for optimal performance. Enhancing fin height improves heat transfer, but excessive height induces air vortices between fins, which diminish the enhancement effect. The optimal fin height is determined as 15 mm when paired with 5–7 fins. This study elucidates the heat transfer mechanisms of fin structures under multi-parameter coupling effects, providing theoretical foundations and parameter optimization strategies for the efficient design of desalination units.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108762"},"PeriodicalIF":6.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681321","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}

引用次数: 0

Using staircase walls to improve heat and mass transfer inside a micro flat plate heat pipe cell: A molecular dynamics simulation study

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-21 DOI: 10.1016/j.icheatmasstransfer.2025.108880

Enzheng Zhang , Xiaolin Yao , Ali B.M. Ali , Narinderjit Singh Sawaran Singh , Sh. Baghaei , Riadh Marzouki

{"title":"Using staircase walls to improve heat and mass transfer inside a micro flat plate heat pipe cell: A molecular dynamics simulation study","authors":"Enzheng Zhang , Xiaolin Yao , Ali B.M. Ali , Narinderjit Singh Sawaran Singh , Sh. Baghaei , Riadh Marzouki","doi":"10.1016/j.icheatmasstransfer.2025.108880","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108880","url":null,"abstract":"<div><div>Heat pipes (HPs) dissipate heat generated or transfer heat linearly efficiently. In equipment such as electronic processors, managing the heat generated is effective in their optimal performance and survival. Micro HPs have been able to perform this task well. However, improving their thermal performance can help develop the electronics industry. In this research, staircase walls have been proposed and studied to improve a flat plate micro HP performance. Considering the dimensions of each cell (90 × 220 × 1050 Å<sup>3</sup>), the molecular dynamics (MD) method has been used for simulations. Aluminum (Al), copper (Cu), and platinum (Pt) have been used as wall metals, and ethanol (EtOH), water (H<sub>2</sub>O), and argon (Ar) as working fluids. The results show that Cu and EtOH result in the best condensation rates. The lowest and the highest condensation rates are related to Pt-H<sub>2</sub>O (62 %) and Cu-EtOH (72 %). Among all working fluids, the lowest evaporation rate is achieved using H<sub>2</sub>O. For Pt and Cu, the highest evaporation rate is obtained using EtOH (75 %). The highest evaporation rate for Al is obtained using Ar (75 %). Among all wall materials, the highest mass transfer rate improvement is related to Al (4 % for Al-Ar and 3 % for Al-H<sub>2</sub>O). In all cases, H<sub>2</sub>O results in the lowest mass transfer rate. The highest mass transfer rate experienced corresponds to Al-Ar and equals 38 %. The lowest and highest heat flux experienced are related to Pt-Ar and Cu-H<sub>2</sub>O and are 1599 and 1833 W/cm<sup>2</sup>, respectively. Cu has the highest heat flux compared to the other two metals. In all cases, the staircase walls improve the heat flux. The highest improvement is also equal to 3.1 % and is related to EtOH.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108880"},"PeriodicalIF":6.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681415","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}

引用次数: 0

Modeling and analysis of effective thermal conductivity during hydrate phase transitions

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-21 DOI: 10.1016/j.icheatmasstransfer.2025.108872

Shicai Sun, Linlin Gu, Wanxin Tian, Rundong Zhang, Yanping Zhao, Yonghao Yin, Guanru Gong

{"title":"Modeling and analysis of effective thermal conductivity during hydrate phase transitions","authors":"Shicai Sun, Linlin Gu, Wanxin Tian, Rundong Zhang, Yanping Zhao, Yonghao Yin, Guanru Gong","doi":"10.1016/j.icheatmasstransfer.2025.108872","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108872","url":null,"abstract":"<div><div>Heat transport and mass transfer happen in the hydrate phase transition, effecting variation of the effective thermal conductivity of the hydrate-water-gas-sediment system. The effective thermal conductivity of methane hydrate and of its sediment system was measured experimentally to propose the additional coefficient formula caused by phase transition. The experimental results show that the effective thermal conductivity of the two systems were 0.2284–2.9900 W·m<sup>−1</sup>·K<sup>−1</sup> and 1.0020–1.5030 W·m<sup>−1</sup>·K<sup>−1</sup>, and the additional coefficients were 0.5129–4.8619 and 0.5979–1.2504, respectively. The porous media structure can suppress various disturbances in the system and reduces the additional coefficient. The additional coefficient is generally normal distribution or has a linear relationship with the variational hydrate content in the phase transition stage but shows a strong linear connection with temperature in the non-phase transition stage. Based on the relation of additional coefficient and hydrate content, a correction effective thermal conductivity model is proposed to predict the effective thermal conductivity of hydrate-bearing sediment system during hydrate phase transition. The experimental data consistently fall within the predictive bounds of the model, with optimal predictive accuracy observed when the hydrate content is below 0.6. These research findings not only enrich the thermal physical property database, but also provide support for heat transfer analysis in the formation and exploitation of hydrate resources.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108872"},"PeriodicalIF":6.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681413","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}

引用次数: 0

Effects of spatially and temporally varied heat generation on fusion behaviors of thermoplastic composites under local thermal non-equilibrium conditions

IF 6.4 2区工程技术

International Communications in Heat and Mass Transfer Pub Date : 2025-03-21 DOI: 10.1016/j.icheatmasstransfer.2025.108884

Yuyuan Yang, Yuhang Yuan, Zhenghua Rao, Tian Zhou

{"title":"Effects of spatially and temporally varied heat generation on fusion behaviors of thermoplastic composites under local thermal non-equilibrium conditions","authors":"Yuyuan Yang, Yuhang Yuan, Zhenghua Rao, Tian Zhou","doi":"10.1016/j.icheatmasstransfer.2025.108884","DOIUrl":"10.1016/j.icheatmasstransfer.2025.108884","url":null,"abstract":"<div><div>When thermally processing fiber reinforced thermoplastic (FRTP) composites, external fields are usually applied to generate spatially and temporally varied heat sources within composites, leading to complex local thermal non-equilibrium (LTNE) phenomena. To address this issue, a Lattice Boltzmann model is established to simulate the fusion behavior of FRTP composites at the scale of the representative elementary volume. The results show that LTNE effects on the fusion of FRTP composites are significant, especially when material has the low interfacial heat transfer coefficient. The increases in internal heat source power and matrix fraction can significantly accelerate melting rates, especially when considering LTNE effects. As compared to the situation where all parameters are at their minimum, the height of the melting region can be 15 times higher, and the height-to-width ratio of the melting region usually increases by 2–3 times. When fiber thermal conductivity increases, fusion and LTNE effects first increase and then weaken. When matrix fraction is low, increasing matrix fraction can increase temperature difference; but when it is high, it shows the opposite effect. This study provides a theoretical basis for the selection of thermal processing parameters of FRTP composites.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"164 ","pages":"Article 108884"},"PeriodicalIF":6.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143681320","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}

引用次数: 0