International Journal of Heat and Mass Transfer最新文献

{"title":"Singular ratchet-valley structure inducing droplet directional transport crossing all boiling states","authors":"Yuhang Guo ,&nbsp;Xiaojun Liu ,&nbsp;Jiawei Ji ,&nbsp;Jiaxiang Wang ,&nbsp;Wei Sun ,&nbsp;Zhaochang Wang ,&nbsp;Kun Liu ,&nbsp;Yunlong Jiao","doi":"10.1016/j.ijheatmasstransfer.2025.127005","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127005","url":null,"abstract":"<div><div>Droplet directional transport on a heated surface is important for thermal management technologies. Current research is well on the droplet manipulation in the Leidenfrost state, but has yet to achieve droplet directional transport below the Leidenfrost temperature, especially nucleate boiling. We demonstrate that the proposed singular ratchet-valley structure (SRVs) exhibits the ability to transport droplets crossing all boiling states including nucleate, transition and film boiling. It is worth noting that the introduced deep-narrow valley on the traditional ratchet array is the key to realize the directional self-transport of boiling droplets. The array wall of the designed valley causes nucleate-boiling droplets to generate evaporative momentum along the ratchet direction, and it also blocks the sub-droplets that are splashing to the wall direction in the transition and spraying-film boiling, forcing the droplets to move along the ratchet direction. In certain scenarios, the SRVs surfaces can achieve droplet's anti-gravity transport, trajectory manipulation, fixed-point heat dissipation, and high-temperature self-cleaning.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"245 ","pages":"Article 127005"},"PeriodicalIF":5.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698062","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":"Calibration of specific heat capacity and thermal conductivity for isotropic and anisotropic materials using full-field data","authors":"Jendrik-Alexander Tröger,&nbsp;Wojciech Kulozik,&nbsp;Stefan Hartmann","doi":"10.1016/j.ijheatmasstransfer.2025.126975","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126975","url":null,"abstract":"<div><div>Identified thermal material parameters are essential for reliable thermo-mechanical or purely thermal numerical simulations. For isotropic materials, specific heat capacity and thermal conductivity can be determined using established methods such as differential scanning calorimetry and laser-flash analysis. However, applying these methods to anisotropic materials requires significant effort in specimen preparation and may lead to questionable results. The advent of full-field measurement methods has significantly increased the availability of experimental data for model calibration. In this work, we utilize full-field temperature data from infrared thermography to calibrate the specific heat capacity and the thermal conductivity tensor of anisotropic composite material. The experimental data stems from a simple experimental setup comprising two heat plates. First, a suitable identification procedure is developed for isotropic material. Then, the proposed two-step calibration scheme is transferred to anisotropic composite material. The model calibration is performed using nonlinear least-squares and finite element simulations. Derivatives for the gradient-based optimization are computed via internal numerical differentiation rather than commonly applied difference quotients. Subsequently, validation is conducted using the first-order second-moment method taking into account various uncertain parameters. We demonstrate that the calibration of the specific heat capacity and the thermal conductivity tensor is feasible using full-field temperature data for isotropic and anisotropic materials. The identified parameters agree reasonably with reference values and show excellent agreement with validation experiments. Additionally, while internal numerical differentiation necessitates modifications to the finite element code, it offers significant rewards by substantially reducing the time required to compute gradients during optimization and uncertainty quantification with the first-order second-moment method. Especially the latter can be seamlessly integrated into the general finite element solution procedure.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"245 ","pages":"Article 126975"},"PeriodicalIF":5.0,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697934","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}

{"title":"An analytic linear relation between the imposed heat flux and the pipe-end temperature for flat heat pipes with porous wicks","authors":"Salar Saadatian,&nbsp;Harris Wong","doi":"10.1016/j.ijheatmasstransfer.2025.126950","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126950","url":null,"abstract":"<div><div>Flat heat pipes have been extensively used in thermal management of microelectronic devices. However, their heat-transfer mechanism has not been analyzed rigorously. A flat heat pipe can be separated into three sections: evaporator, adiabatic, and condenser. Heat is supplied to the evaporator and removed from the condenser. We consider a horizontal flat heat pipe with an idealized porous wick on either one or both walls. The pores in the wick are straight circular capillaries running along and across the wick and are filled with a partially-wetting liquid. The rest of the pipe is filled with its vapor. We assume that the heat transfer is one-dimensional, and the pore size is extremely small compared with the pipe length. Therefore, the pore-level phenomena can be studied separately from those at the pipe level. The analytic solution for the mass evaporative rate in a single pore is incorporated into the mass, momentum, and energy balances along the pipe. We take the evaporator to have the same length as the condenser which leads to skew-symmetric solutions. Hence, we only need to focus on the heated half of the pipe, and solve the steady-state problem with a specified heat flux <span><math><msup><mrow><mi>q</mi></mrow><mrow><mo>′</mo><mo>′</mo></mrow></msup></math></span> at the evaporator. We find for the first time an analytic linear relation between <span><math><msup><mrow><mi>q</mi></mrow><mrow><mo>′</mo><mo>′</mo></mrow></msup></math></span> and <span><math><mrow><mi>Δ</mi><mi>T</mi></mrow></math></span>, where <span><math><mrow><mn>2</mn><mi>Δ</mi><mi>T</mi></mrow></math></span> is the temperature difference between the two ends of the pipe. This analytic relation is validated by comparing with four published experiments. The analytic relation shows that to optimize the performance, a flat heat pipe should be designed with maximum wick porosity, liquid thermal conductivity, and number of evaporative pores, and minimum wick permeability.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"245 ","pages":"Article 126950"},"PeriodicalIF":5.0,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697935","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":"Upscaling coal self-heating reaction models from the laboratory to field applications","authors":"Xuebin Wu ,&nbsp;Guangyao Si ,&nbsp;Jian Zhang ,&nbsp;Jingyu An ,&nbsp;Zexin Yu ,&nbsp;Yu Jing ,&nbsp;Peyman Mostaghimi ,&nbsp;Ting Ren","doi":"10.1016/j.ijheatmasstransfer.2025.127002","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127002","url":null,"abstract":"<div><div>During the coal mining process, real-time monitoring and analysis of gases are crucial for preventing and controlling coal spontaneous combustion (sponcom). Laboratory-based gas evolution tests and reaction models on coal for sponcom prevention are often difficult to be scaled up in field goaf conditions. Computational fluid dynamics modelling addresses these challenges but faces issues with temperature impacts on coal properties and upscaling to goaf environments. Addressing these issues, this study has developed a novel coal oxidation model that accounts for variation in coal properties with temperature and introduces oxidation products of C₂H₄ and C₂H₆ as key gas indicators. This model uses gas composition and concentration changes to assess the progression of sponcom in longwall goaf. Compared to previous models, this approach significantly improves accuracy by incorporating key gas indicators and better capturing the temperature-dependent behaviours of coal. Simulation results indicate a clear localisation trend of coal sponcom in the goaf: as the reaction intensifies, the highest-temperature points initially move deeper into the goaf and then migrate towards face areas with higher oxygen concentrations. The decrease in O₂ concentration, changes in the Graham's ratio, and the generation of C₂H₄ and C₂H₆ can all indicate different stages of coal self-heating. This phenomenon reveals the complex interactions between temperature, oxygen concentration, and coal properties. The findings highlight the critical role of temperature and gas components in sponcom, providing a basis for optimising monitoring locations in goaf areas to improve early detection and real-time risk assessment, ultimately enhancing sponcom early-warning accuracy and coal mine safety.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"245 ","pages":"Article 127002"},"PeriodicalIF":5.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682501","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}

{"title":"Advances in Desiccant Wheels for Dehumidification, VOC Mitigation, and CO2 Removal for Energy-Efficient IAQ Management","authors":"Jubair A. Shamim ,&nbsp;Xiaoli Liu ,&nbsp;Easwaran Krishnan ,&nbsp;Kai Li ,&nbsp;M Muneeshwaran ,&nbsp;Huixin Jiang ,&nbsp;Poorandokht Ilani-Kashkouli ,&nbsp;Kashif Nawaz","doi":"10.1016/j.ijheatmasstransfer.2025.126906","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126906","url":null,"abstract":"<div><div>Humidity control is pivotal to maintain occupant thermal comfort and suppress mold growth in indoor environments. Furthermore, poor indoor air quality (IAQ) due to the presence of volatile organic compounds (VOCs) and high concentrations (&gt;1,000 ppm) of CO₂ can cause health issues and negatively affect cognitive performance. Therefore, providing high-quality indoor air has gained significant attention over the past decade. Conventional cooling coil and filter-based HVAC systems have limited capability to meet the augmented demand for occupant thermal comfort and high indoor air quality. Moreover, modern buildings are increasingly airtight to save energy, and increasing ventilation to mitigate VOC and CO₂ concentration is discouraged. Separate sensible and latent cooling technology using a rotary desiccant wheel presents a promising solution in this respect. Because of the development of desiccant materials with high water vapor, VOC, and CO₂ uptake, desiccant wheels can be used as an integrated technology option for IAQ management. To promote desiccant wheel use for energy-efficient management of IAQ in buildings, this article reviews recent advancements in using desiccant wheels for dehumidification, VOC mitigation, and CO₂ capture from outdoor air. Finally, the article presents the authors’ perspective by summarizing the key research gaps in the field and discussing the future direction of research to address these gaps from two different aspects, namely, suitable adsorbent material development and desiccant wheel design.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"245 ","pages":"Article 126906"},"PeriodicalIF":5.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682498","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":"Comment on “Analysis of a diffusion–reaction heat transfer problem in a finite thickness layer adjoined by a semi-infinite medium”","authors":"Juan Lv,&nbsp;Chaoyang Chen","doi":"10.1016/j.ijheatmasstransfer.2025.126951","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126951","url":null,"abstract":"<div><div>This paper presents a comment on “Analysis of a diffusion–reaction heat transfer problem in a finite thickness layer adjoined by a semi-infinite medium” International Journal of Heat and Mass Transfer 205 (2023) 123919.” The research of the author is valuable. However, the non-dimensionalization to the governing equations should be corrected.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"245 ","pages":"Article 126951"},"PeriodicalIF":5.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682502","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":"Coarse-grained molecular dynamics simulations of interdiffusion and thermomechanical properties at the interface of laser powder bed fusion processed thermoplastics","authors":"Tian Zhou,&nbsp;Chao Fan,&nbsp;Yuyuan Yang,&nbsp;Zhenghua Rao","doi":"10.1016/j.ijheatmasstransfer.2025.126990","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126990","url":null,"abstract":"<div><div>The interfacial behaviors of thermoplastic polymers during laser sintering are an important issue in determining the performance of 3D printed products. In this study, by considering the molecular chain microstructure, a coarse-grained molecular dynamic model is developed to simulate the interdiffusion process at the interface of PA 6 particles, and the effects of different degrees of polymerization and fusion temperatures on the fraction-depth tensor of polymer chains are identified. In addition, the impact of varying fraction-depth tensors on the mechanical strength, thermal conductivity, and viscosity of PA 6 are discussed. From the simulation results, it is proposed to divide the microscopic interfacial interdiffusion into four stages according to interfacial behaviors and fraction-depth tensor, i.e., the interface formation stage, the chain movement stage, the interfacial decomposition stage, and the entanglement volume stage. The operating conditions determine the final stage that the interdiffusion process can reach, which leads to the corresponding variation in mechanical strength. When PA 6 has a higher polymerization degree and reaches a higher level of interdiffusion stages, higher mechanical strength can be obtained because of chain self-locking. The viscosity of the polymer, respectively, decreases by 87.76 %, 86.11 %, and 82.05 % for the degree of polymerizations 50, 100, and 200 without chain self-locking; when the chain self-locking occurs, the viscosity decreases by only 66.71 % for the degree of polymerizations 300. The interfacial entanglement has less effects on the thermal conductivity of PA6. This study provides a microscopic understanding of the interdiffusion between laser-sintered thermoplastic particles, which can help screen suitable thermoplastic materials for laser powder bed fusion technology.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"245 ","pages":"Article 126990"},"PeriodicalIF":5.0,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682500","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":"Investigation on the jet impingement cooling of steel discs using air-atomized water mist","authors":"Rui Xu ,&nbsp;Renyou Zhang ,&nbsp;Jiaying Jiang ,&nbsp;Zhibiao Wang ,&nbsp;Zhuo Zhang ,&nbsp;Kailun Zheng ,&nbsp;Lei Zhao","doi":"10.1016/j.ijheatmasstransfer.2025.126989","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126989","url":null,"abstract":"<div><div>The high-performance manufacturing of turbine discs requires a green, controllable, and rapid quenching method to regulate phase transformations and enable the on-demand engineering of mechanical properties during heat treatment. This study proposes the high-speed jet impingement cooling of air-atomized water mist for quenching irregularly shaped steel discs. A customized facility capable of heating to 1200 °C and cooling workpieces using 90 high-speed spraying nozzles, was developed for quenching a 210 mm diameter stainless steel turbine disc. The cooling rate was tunable by adjusting the jetting velocity (100–150 m/s) and water load fraction. Numerical simulations, based on an enthalpy-based continuum spray model, were used to circumvent the complex dynamics of water droplets by treating the mist as a single-phase fluid with phase-dependent properties, providing accurate thermal and flow predictions. Introducing the fine mist of droplets into high-speed air jets enhanced cooling performance, achieving ultrafast cooling rates of 673 °C/min during the solid solution phase transformation, four times faster than single-phase air jets and comparable to oil immersion cooling. Increasing the water load fraction substantially promote cooling, whereas increasing jetting velocity had a marginal effect. These heat transfer enhancements become less effective, as the Biot number exceeds 4 and the cooling transitioned into a conduction-limited regime. The jet impingement cooling of air-atomized mist offers a viable, controllable and environmentally friendly approach to the high-performance quenching, applicable to not only steel turbine discs but also to diverse materials and metallic components.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"245 ","pages":"Article 126989"},"PeriodicalIF":5.0,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682499","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":"Axial-vapor-flow induced, low-liquid-saturation heat-pipe effect in wet insulation: Simulation and experiment","authors":"Fan Lu ,&nbsp;Massoud Kaviany ,&nbsp;Bryan Veyera ,&nbsp;John Williams","doi":"10.1016/j.ijheatmasstransfer.2025.126857","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126857","url":null,"abstract":"<div><div>In field applications, segmented pipe thermal insulation wrappings are susceptible to inter-segment water penetration and its axial transport, which degrades the insulation thermal performance and causes pipe corrosion under insulation (CUI). Through CFD simulation, this axial transport, its local condensation/evaporation and liquid/vapor movement, and the temperature and liquid saturation distributions are predicted. The accompanying experiment (mineral wool insulation) conditions are a horizontal pipe with a length of 70 cm and a diameter of 9 cm, covered with 5 cm of mineral wool insulation and jacketed with an impermeable aluminum sheet under surface-convection and radiation heat transfer to the surroundings (27°C). The simulated 100°C vapor supply (0.013 g/s baseline) is prescribed at the axial inlet. The simulation results show the formation of an entrance region with radial condensation and evaporation, a dry region adjacent to the pipe, and low liquid saturation adjacent to the outer boundary. The heat loss in this entrance region is 4 - 7 folds larger than the dry insulation, depending on the inlet moisture flow rate. This increase is predominantly due to the radial evaporation/condensation, i.e., the heat-pipe effect, since the liquid saturation is too small to substantially increase the apparent thermal conductivity. Thus, the radial temperature distribution is noticeably altered by this heat-pipe effect. The entrance region is marked by complete condensation of the injected vapor and has a length and excess heat loss proportional to the vapor injection rate. The test results confirm the entrance region heat-pipe effect signified by large heat loss, temperature rises as a function of angle, and the vapor penetration depth.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"244 ","pages":"Article 126857"},"PeriodicalIF":5.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686796","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":"Physics-informed neural networks for effective diffusion characteristics inversion in packed bed at low flow rates","authors":"Mouhao Wang ,&nbsp;Shanshan Bu ,&nbsp;Bing Zhou ,&nbsp;Baoping Gong ,&nbsp;Zhenzhong Li ,&nbsp;Deqi Chen","doi":"10.1016/j.ijheatmasstransfer.2025.126970","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.126970","url":null,"abstract":"<div><div>Simplified packed-bed scale models based on porous medium are often utilized for rapid design and evaluation calculations in engineering practice, as opposed to detailed pore-scale computations. In this study, the effective diffusion characteristics within packed beds at low flow rates were investigated through numerical calculations, aiming to improve the accuracy of mass transfer calculations in packed-bed scale model. A novel inverse method based on Physics-Informed Neural Networks (PINNs) was proposed to extract the effective diffusion characteristics within the packed bed. The study reveals that low flow rates create stagnant flow regions in packed bed, leading to discrepancies in average velocities between the packed-bed scale model and the actual pore scale model. By introducing an effective convection coefficient to suppress the artificial increase of the convection term in the convection-dispersion equation, the accuracy of concentration calculations in the packed-bed scale model is significantly improved. The average concentration deviation at the outlet decreases from 15.5 % to less than 1 %. Further analysis indicates that when the particle Reynolds number is less than 0.25, the Peclet number is less than 0.4, and the flow pattern in the packed bed may transition to pre-Darcy flow, where molecular diffusion predominantly governs mass transport in the system, while the contributions of convection and mechanical dispersion to mass transfer are relatively minor. Finally, the correlation models of effective diffusion characteristics with particle Reynolds number and Peclet number were constructed, and the prediction deviations of effective convection coefficient and effective diffusion coefficient are within ± 2 % and ± 5 % respectively.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"244 ","pages":"Article 126970"},"PeriodicalIF":5.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686799","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}