International Communications in Heat and Mass Transfer最新文献

{"title":"Experimental and numerical investigation of heat transfer enhancement using perforated fins in electric motor","authors":"Madhao B. Bhambere ,&nbsp;Sharad S. Chaudhari ,&nbsp;Himanshu R. Banait","doi":"10.1016/j.icheatmasstransfer.2025.109115","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109115","url":null,"abstract":"<div><div>Previous research has struggled to optimize heat transfer efficiency in electric motors, mainly relying on inefficient standard fin designs. This study compares solid and perforated fins' effects on convective heat transfer and pressure drop in a 1.5 kW (2HP) electric motor casing. A Computational Fluid Dynamics (CFD) simulation, validated experimentally using an industrial air heater, K-type thermocouples, a hot wire anemometer, and a data logger, is conducted in ANSYS Fluent 2023R1. Four perforated fin designs with 4 mm (Design A), 6 mm (Design B), 8 mm (Design C), and 10 mm (Design D) perforations are compared with solid fins. Results indicate that perforated fins enhance heat transfer, with Design A improving the heat transfer coefficient by 38.09 %. However, perforations also affect pressure drop, a crucial factor in practical applications. A Performance Evaluation Criterion (PEC) balances heat transfer enhancement and pressure drop, with Design A achieving the highest PEC value (&gt;1), demonstrating superior thermal performance with manageable flow resistance. This research highlights the importance of optimizing perforation size to maximize cooling while minimizing flow resistance, offering valuable insights for designing thermally efficient electric motor housings.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109115"},"PeriodicalIF":6.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185054","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":"Novel analytical wave solutions in nonlinear thermoelasticity using the IME tanh function method","authors":"Mohamed F. Ismail ,&nbsp;Hamdy M. Ahmed ,&nbsp;Alaa A. El-Bary ,&nbsp;Abdallah A. Syied ,&nbsp;Taher A. Nofal ,&nbsp;Karim K. Ahmed","doi":"10.1016/j.icheatmasstransfer.2025.109044","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109044","url":null,"abstract":"<div><div>This study presents the improved Modified Extended (IME) tanh function method, utilized to analyze equations based on the Green–Naghdi (G–N II) theory thermo-elasticity. Unlike conventional methods, the proposed technique enhances the ability to derive a wide spectrum of exact solutions, making it particularly effective for capturing the complex interplay between mechanical and thermal effects in nonlinear thermoelastic systems. Nonlinear thermo-elasticity examines scenarios when a material’s characteristics and form experience substantial changes due to varying thermal stresses. This research domain is essential for understanding real-world phenomena, including material behavior at elevated temperatures, thermal stresses in extensive structures, and intricate interactions between mechanical and thermal forces. The suggested method produces a diverse array of exact solutions, encompassing exponential, polynomial, Jacobi elliptic (JE), singular soliton, and hyperbolic solutions, with distinct free parameters that have not been documented. Additionally, the study incorporates graphical depictions of diverse displacement components, temperature variations, and stress tensors.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109044"},"PeriodicalIF":6.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185055","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":"Optimization of interfacial thermal resistance in boron nitride/epoxy composites through chirality and functionalization: A molecular dynamics approach","authors":"Chengdi Xiao ,&nbsp;Yutong Wu ,&nbsp;Wenqiang Shu ,&nbsp;Haitao Zhang ,&nbsp;Xixin Rao","doi":"10.1016/j.icheatmasstransfer.2025.109148","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109148","url":null,"abstract":"<div><div>With the increasing power density of modern electronic devices, effective thermal management is crucial for maintaining performance and reliability. Epoxy resins (EP), widely used in electronic packaging due to their excellent mechanical properties and electrical insulation, suffer from inherently low thermal conductivity, which limits their effectiveness in high heat flux environments. Incorporating glycine (NH₂-CH₂-COOH)-functionalized hexagonal boron nitride nanosheets (BNNS) as fillers has shown promise in addressing this limitation. However, the effect of BNNS edge chirality and functionalization on interfacial thermal resistance (ITR) remains insufficiently explored. In this study, we employed non-equilibrium molecular dynamics simulations to systematically investigate the influence of armchair and zigzag BNNS structures, as well as glycine functionalization, on the ITR in BNNS/EP composites. Our results indicate that armchair BNNS significantly reduces ITR compared to zigzag BNNS, and that a glycine functionalization rate of 22.2 % leads to a substantial ITR reduction of approximately 70 %. Detailed analyses of the vibrational density of states, mean square displacement, and interfacial binding energy provide further insight into the mechanisms governing phonon transport at the interface. This work establishes a theoretical framework for designing high thermal conductivity composites and offers a novel strategy to minimize ITR by optimizing BNNS chirality and functionalization.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109148"},"PeriodicalIF":6.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185052","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 comparative analysis of thermal and pressure distribution in rotating flows of von Karman and Bodewadt using multivariate regression models: A case of machine learning techniques","authors":"Himanshu Upreti ,&nbsp;Alok Kumar Pandey ,&nbsp;Ankita Pandey ,&nbsp;Priya Bartwal","doi":"10.1016/j.icheatmasstransfer.2025.109118","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109118","url":null,"abstract":"<div><div>This work is related to fluid flow over a rotating disk, which has attracted significant interest due to its applications in engineering, aerodynamics, and industrial processes. This research presents a detailed numerical solution of rotating flows of von Karman and Bodewadt. The system of boundary layer approximation consists of the external forces i.e. Hall current, magnetic field, thermal radiation, Darcy-Forchheimer porous model and slip mechanism. The governing equations are boundary value problem which is solved using bvp4c solver, that efficiently handles non-linear differential equations with boundary conditions at two different points. To further analyze the flow characteristics, we employ multivariate linear and polynomial regression models, providing data driven perspective on the dependency of SFC (skin friction coefficient) and LNN (local Nusselt number) on governing parameters. The study reports that, multivariate linear regression and polynomial regression are the machine learning approaches used to estimate the SFC and LNN values for the von Karman and Bodewadt flows, respectively. The MAE (mean absolute error), MSE (mean square error), and<span><math><msup><mi>R</mi><mn>2</mn></msup></math></span>are used to evaluate the prediction's performance. The highest <span><math><msup><mi>R</mi><mn>2</mn></msup></math></span>values for the implemented method is obtained as 0.98905073. The results obtained demonstrate the efficacy of machine learning techniques in this field.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109118"},"PeriodicalIF":6.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185046","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":"Effect of channel thickness on the particle diffusion and permeability of carbon nanotubes a membrane in reverse electrodialysis process using molecular dynamics simulation","authors":"Shuai Sun ,&nbsp;Ali Basem ,&nbsp;Narinderjit Singh Sawaran Singh ,&nbsp;Younis Mohamed Atiah Al-zahy ,&nbsp;Salman Saeidlou ,&nbsp;Khursheed Muzammil ,&nbsp;Soheil Salahshour ,&nbsp;S. Mohammad Sajadi ,&nbsp;Hani Sahramaneshi","doi":"10.1016/j.icheatmasstransfer.2025.109155","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109155","url":null,"abstract":"<div><div>Adopting innovative technology and solutions is critical for ensuring clean water. Several methods may be used to remove salts from water. They may be divided into two categories: membranes and heat. Reverse electrodialysis, which uses a membrane, is an efficient way of separating substances. Prior research investigated system-level factors, but the nanoscale mechanisms that drive ion and water penetration across membranes were poorly understood. This study closed a research gap by investigating the influence of carbon nanotube membrane thickness on particle mobility and fluid dynamics in reverse electrodialysis systems. The research is contributed to the enhancement of energy conversion efficiency and membrane performance in reverse electrodialysis systems by offering a comprehensive understanding of the influence of channel thickness on particle transport and selectivity through the carbon nanotube membrane. Molecular dynamics simulations using the LAMMPS software package are conducted to examine the effect of carbon nanotube thickness variation (1-layer vs 2-layer) on fluid flow, ionic current, hydrogen bonding, and fluid density. To the findings, increasing the thickness of a carbon nanotube from one layer to two layers decreases the fluid flow rate to 203.79 atoms/ns and the current from 5.31 e/ns to 5.15 e/ns. Additionally, the number of broken hydrogen bonds decreases from 116 to 105, indicating decreased permeability and increased stability of the hydrogen-bonding network. In addition to offering useful information for the construction of more effective and selective membranes in renewable energy applications, these results provided a molecular understanding of how carbon nanotube thickness affected reverse electrodialysis effectiveness.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109155"},"PeriodicalIF":6.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185053","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":"An AI-driven innovative approach for void fraction prediction to estimate drag coefficient","authors":"Junfeng Li ,&nbsp;Zhenhong Liu ,&nbsp;Yunyu Qiu ,&nbsp;Da Wang ,&nbsp;Ryo Yokoyama ,&nbsp;Jinbiao Xiong ,&nbsp;Kai Wang ,&nbsp;Yunzhong Zhu","doi":"10.1016/j.icheatmasstransfer.2025.109132","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109132","url":null,"abstract":"<div><div>In this paper, we propose an innovative artificial intelligence (AI) -based method to estimate drag coefficients in two-phase flows by predicting void fraction. To solve the problem of the limited application range of traditional empirical relationships, four AI models, namely random forest, Transformer, Mamba and ridge regression, are used in this study to train and predict horizontal gas-liquid two-phase flow void fraction database (6554 data points). By analyzing the influence of input parameter combination, it is found that liquid velocity plays a key role in reducing the prediction error, and the optimal parameter combination is pipe diameter to length ratio, pressure and liquid velocity. The results show that the random forest model has the best performance, with a mean error (ME) is only 1.32 %. Further research has shown that the Transformer model has high accuracy in evaluating the effects of a single parameter. Finally, the high accuracy of random forest in estimation of drag coefficient is verified by the correlation formula between void fraction and drag coefficient. This study reveals the potential of AI model in the prediction of complex two-phase flow parameters, and provides a new idea for intelligent prediction of drag coefficient.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109132"},"PeriodicalIF":6.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178232","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 review of optimization strategies for phase change materials: Techniques, applications, and challenges in thermal storage systems","authors":"Mohsen Izadi ,&nbsp;Ioan Pop ,&nbsp;Sabir Ali Shehzad ,&nbsp;Faris Alqurashi ,&nbsp;Mohamed H. Mohamed ,&nbsp;Ahmad Hajjar ,&nbsp;Ibrahim Mahariq","doi":"10.1016/j.icheatmasstransfer.2025.109123","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109123","url":null,"abstract":"<div><div>Phase Change Materials (PCMs) are widely recognized for their potential in thermal energy storage systems due to their high latent heat capacity. However, their practical application is significantly hindered by low thermal conductivity, which limits the charging and discharging rates of energy. This review provides a comprehensive and critical synthesis of recent passive techniques developed to enhance the thermal performance of PCMs. These include finned structures, porous media, nanoparticle dispersion, geometrical modifications, and multi-PCM strategies. Quantitative comparisons show that the use of fins can reduce melting time by up to 65 %, while metallic porous matrices can improve thermal conductivity by over 500 %. Incorporation of nanoparticles has demonstrated up to 25 % enhancement in heat transfer rates, albeit with increased viscosity. Geometrical innovations and multi-PCM layering have enabled tailored thermal responses across temperature ranges, suitable for applications such as solar thermal systems and building-integrated energy storage. Furthermore, this review identifies trade-offs associated with each method, including design complexity, cost, and material compatibility, and presents a comparative performance table to guide selection based on system requirements. Hybrid enhancement strategies, such as nanoparticle-doped PCMs embedded in metal foams, are also proposed as a promising direction for future research. The review concludes with specific, forward-looking insights, highlighting opportunities for PCM-based solutions in solar desalination, cold-chain transport, and passive building cooling under real-world constraints.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109123"},"PeriodicalIF":6.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169640","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":"Convective flow between inclined plates using Cartesian coordinate system","authors":"Noureen ,&nbsp;Dil Nawaz Khan ,&nbsp;Naeem Ullah ,&nbsp;Marouan Kouki ,&nbsp;Sana Ahmed Khalil Ali","doi":"10.1016/j.icheatmasstransfer.2025.109143","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109143","url":null,"abstract":"<div><div>This paper examines the convective transport of thermal energy in flow, maintained between inclined, rectangular, and heated walls. The convection process and non-uniform stream velocity at the centre of these particular channels have developed the fluid motion, whereas, the diffusion of heat and behavior of flow in the whole channel is examined by considering the different thermal and dynamical situations in the flow domain. Both walls of this channel are heated and have uniform temperatures, however, temperature distribution is significantly changed in the flow regime with the variation of thermal and geometrical characteristics. The problem is formulated in terms of two-dimensional continuity and Navier-Stokes equations in a rectangular coordinate system. The leading equations, i.e., PDEs and the associated boundary condition (BCs), are converted into a set of ODEs with the help of proper similarity transformation. Asymptotic (perturbation) and numerical (bvp4c package) procedures are employed to solve the resulting problem. The perturbation technique is applicable for small parameter values and these ranges of dimensionless numbers meet the criteria of convergent series solutions for the problem in hand, whereas, the numerical method provides solutions across a widespread range of governing constraints in the problem. Remember that the final equations are equipped with a slope for the upper wall of the channel, Reynolds number, Prandtl number, and two components of Grashof number. To the best of the author's knowledge, a self-similar solution of the forced convective flow in this particular structure and the specified BCs has not been studied using the Cartesian coordinate system. The impacts of various parameters have been noted on the graphs for velocity, temperature distribution, skin friction and the rate of heat transfer coefficient. The temperature profile is effectively enhanced particularly for gases and liquid flow within a converging (diverging) channel with the change of various parameters. However, the temperature profiles decrease for certain parameters, such as:<ul><li><span>•</span><span><div>water flow in a converging channel when the slope of the wall (<span><math><mi>m</mi></math></span>) lies in the range <span><math><mn>0</mn><mo>&lt;</mo><mi>m</mi><mo>&lt;</mo><mn>0.33</mn></math></span>,</div></span></li><li><span>•</span><span><div>flow of water and air in a converging channel when the Grashof number is varied for assisting and opposing flow.</div></span></li></ul></div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109143"},"PeriodicalIF":6.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169639","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":"Three approaches (experimental, simulation and ANN) based investigation of thermal characteristic and correlation for frustrum roughened solar air heater","authors":"Dharam Singh,&nbsp;Vikash Kumar","doi":"10.1016/j.icheatmasstransfer.2025.109108","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109108","url":null,"abstract":"<div><div>This investigation is an attempt to use the concept of artificial roughness (AR) and enhance the heating capacity of solar air heater (SAH). Frustrum shaped roughness geometry has been fabricated using different sizes punch and die. Frustum roughness having more contact surface area with flowing fluid leading to more heat transfer. The work reported experimental, simulation and artificial neural network (ANN)-based investigation. Enhancement in thermal characteristic of frustrum shaped roughened SAH has been discussed with including fluid flow physics. Main roughness and flow parameter was relative frustum pitch (p/e = 8–14), relative frustum height (e/D_h = 0.013–0.054), Relative frustum height to base diameter (e/d₁ = 0.37–0.75), relative frustum diametral ratio (d₁/d₂ = 1.33–3). Maximum augmentation in Nusselt number (Nu) for varying e/D_h, p/e, d₁/d₂ and e/d₁ was 222, 226, 241 and 237 that of friction factor (f) was 0.019, 0.021, 0.022, and 0.021. Collected experimental data was also used to develop mathematical correlation between thermal characteristic (Nu and f) with roughness and flow parameter. Derived mathematical also validate by comparing correlation predicted value with ANN predicted values. ‘Nu’ and ‘f’ values from statistical correlation was in close agreement to the ANN predicted values with mean deviation being ±9.5 % for Nu and 12 % for f.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109108"},"PeriodicalIF":6.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169637","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":"Interfacial thermal conductance at the gas-solid interface: microscopic energy transport mechanisms and the thermal rectification phenomenon","authors":"Chenchen Lu ,&nbsp;Xujun Xu ,&nbsp;Yanhua Cheng ,&nbsp;Zheyong Fan ,&nbsp;Zhen Li ,&nbsp;Junhua Zhao ,&nbsp;Ning Wei","doi":"10.1016/j.icheatmasstransfer.2025.109153","DOIUrl":"10.1016/j.icheatmasstransfer.2025.109153","url":null,"abstract":"<div><div>The thermal conductance across gas-solid interfaces is the primary pathway for thermal dissipation in low thermal conductivity materials. However, research on energy transport at the gas-solid interface is limited, leaving the mechanisms that influence thermal properties unclear. In this study, we systematically investigate the microscopic behavior of gas on solid surfaces and decouple two distinct collision modes that influence energy transfer efficiency: immediate reflection and adsorption-reflection. Our findings reveal an intrinsic thermal rectification up to 30 % at the gas-solid interface, indicating that asymmetric energy transfer occurs. This asymmetry in energy transfer efficiency arises from variations in the proportion of the two collision behaviors. Collision frequency is a key factor influencing energy transport efficiency across gases with varying densities. Additionally, a convergence point is observed when a dense gas layer adsorbs at the solid interface, where gas interactions dominate interfacial thermal conductance. These findings offer new insights into the microscopic mechanisms of energy transport at the gas-solid interface, providing a foundation for optimizing thermal properties in insulation materials.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"166 ","pages":"Article 109153"},"PeriodicalIF":6.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144169638","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}