Case Studies in Thermal Engineering最新文献

{"title":"Computational investigation of heat transfer and fluid flow in a NEPCM-filled cavity with sinusoidal porous layer: Influence of magnetic field and exothermic reactions","authors":"Mohammed Azeez Alomari , Ahmed M. Hassan , Hawkar Qsim Birdawod , Faris Alqurashi , Mujtaba A. Flayyih , Abdellatif M. Sadeq","doi":"10.1016/j.csite.2025.106013","DOIUrl":"10.1016/j.csite.2025.106013","url":null,"abstract":"<div><div>This pioneering study presents a novel investigation of the complex interplay of magnetohydrodynamic (MHD) free convection, double-diffusion, and exothermic reactions in a square cavity with a unique configuration. A corrugated porous layer with a thickness of 0.2L adheres to the left wall. The cavity is partially filled with a nano-enhanced phase change material (NEPCM) suspended porous medium. This innovative design combines the benefits of corrugated surfaces, NEPCMs, and magnetic field control for enhanced thermal management. Using the Galerkin finite element method and PARDISO solver, a comprehensive numerical analysis investigates the effects of various parameters on heat transfer, mass transfer, and entropy generation. These parameters include Frank-Kameneteskii number (<span><math><mrow><mn>0</mn><mo>≤</mo><mi>F</mi><mi>K</mi><mo>≤</mo><mn>2.5</mn></mrow></math></span>), Darcy number (<span><math><mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup><mo>≤</mo><mi>D</mi><mi>a</mi><mo>≤</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>2</mn></mrow></msup></mrow></math></span>), Rayleigh number (<span><math><mrow><msup><mn>10</mn><mn>3</mn></msup><mo>≤</mo><mi>R</mi><mi>a</mi><mo>≤</mo><msup><mn>10</mn><mn>5</mn></msup></mrow></math></span>), buoyancy ratio (<span><math><mrow><mn>1</mn><mo>≤</mo><mi>N</mi><mi>z</mi><mo>≤</mo><mn>5</mn></mrow></math></span>), Lewis number (<span><math><mrow><mn>0.1</mn><mo>≤</mo><mi>L</mi><mi>e</mi><mo>≤</mo><mn>10</mn></mrow></math></span>), fusion temperature (<span><math><mrow><mn>0.1</mn><mo>≤</mo><msub><mi>θ</mi><mi>f</mi></msub><mo>≤</mo><mn>0.9</mn></mrow></math></span>), Stefan number (<span><math><mrow><mn>0.1</mn><mo>≤</mo><mi>S</mi><mi>t</mi><mi>e</mi><mo>≤</mo><mn>0.9</mn></mrow></math></span>), magnetic field inclination (<span><math><mrow><mn>0</mn><mo>°</mo><mo>≤</mo><mi>γ</mi><mo>≤</mo><mn>90</mn><mo>°</mo></mrow></math></span>), Hartmann number (<span><math><mrow><mn>0</mn><mo>≤</mo><mi>H</mi><mi>a</mi><mo>≤</mo><mn>50</mn></mrow></math></span>), and NEPCM concentration (<span><math><mrow><mn>0.01</mn><mo>≤</mo><mi>ϕ</mi><mo>≤</mo><mn>0.035</mn></mrow></math></span>). Results demonstrate that increasing Ra from <span><math><mrow><msup><mn>10</mn><mn>3</mn></msup></mrow></math></span> to <span><math><mrow><msup><mn>10</mn><mn>5</mn></msup></mrow></math></span> enhances the average Nusselt number by 324 % at <span><math><mrow><mi>F</mi><mi>K</mi><mo>=</mo><mn>1</mn></mrow></math></span>. Nanoparticle volume fraction significantly improves heat transfer, with a 67.6 % increase in Nusselt number as <span><math><mrow><mi>ϕ</mi></mrow></math></span> rises from 0.01 to 0.035. The magnetic field suppresses convection, reducing Nusselt and Sherwood numbers by 57.8 % and 27.4 %, respectively, as <span><math><mrow><mi>H</mi><mi>a</mi></mrow></math></span> increases from 0 to 50. Entropy generation decreases by 84 % under the same conditions. These findings are particularly relevant for design","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 106013"},"PeriodicalIF":6.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618336","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":"Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors","authors":"Hang Jin ,&nbsp;Zujing Zhang ,&nbsp;Ruiyong Mao ,&nbsp;Jiri Zhou ,&nbsp;Hongwei Wu ,&nbsp;Xing Liang","doi":"10.1016/j.csite.2025.106023","DOIUrl":"10.1016/j.csite.2025.106023","url":null,"abstract":"<div><div>Acceptable temperature is crucial for underground refuge chamber (URC) to ensure the safety and comfort of occupants. A novel temperature control scheme combining mechanical ventilation with deflectors was proposed for URCs. In this study, the effects of ventilation rate (VR), deflector height and deflector angle on ambient temperature control performance and airflow organization of URC were investigated through orthogonal experiments. Results show that: (Ⅰ) The ambient temperature gradient of URC decreases with the increase of VR and deflector height. (Ⅱ) With VR of 350 m³/h, deflector height of 1.40 m, and deflector angle of 0°, compared to the situation without deflectors, the temperature unevenness coefficient can be effectively reduced, the head-to-foot temperature difference can meet the design standard requirements, the waste heat emissions efficiency is increased by 46.1 %, and an average decrease in ambient temperature of 2 °C (Ⅲ) The influence of various factors on the ambient temperature control performance in the URC is as follows: deflector height &gt; VR &gt; deflector angle.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 106023"},"PeriodicalIF":6.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632045","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":"Effects of using BN/water nanofluid on the thermal performance, energy saving, and power consumption of a panel radiator heating system","authors":"Ahmet Çağlar","doi":"10.1016/j.csite.2025.106024","DOIUrl":"10.1016/j.csite.2025.106024","url":null,"abstract":"<div><div>Heating systems account for a significant portion of global energy consumption, yet conventional fluids like water limit the thermal efficiency of panel radiators. Improving radiator performance while reducing energy use is critical for achieving sustainability goals. This study addresses this challenge by investigating boron nitride (BN)-doped water nanofluid as an advanced heat transfer fluid, which promises enhanced thermal performance and energy savings compared to water. A Type 11 Panel-Convector (PC) radiator was tested experimentally under transient regime conditions with both water and nanofluid. The amount of heat emitted from the radiator to the room and the air-side heat transfer coefficient were determined for both fluids at a radiator inlet temperature of 75 °C. Additionally, energy consumptions during the experiments for both fluids are compared. The results indicate that the desired room temperature was reached in 17 min using nanofluid, while it took 27 min with water. The air-side heat transfer coefficient increased by an average of 71 %, while the heat emission rate improved by up to 45 % compared to water. The use of BN-water nanofluid results in an 8.1 % overall energy savings in the heating system. The BN-water nanofluid significiantly improves radiator performance and overall system energy efficiency.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 106024"},"PeriodicalIF":6.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628429","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":"Maximizing photovoltaic thermal system through computational fluid dynamics-driven multi-factor parametric optimization: A Taguchi-grey relational analysis method to enhancing electrical output and cooling efficiency for sustainable energy","authors":"Natnale Sitotaw Asefa ,&nbsp;Kiran Shahapurkar ,&nbsp;Tilahun Nigussie ,&nbsp;Abdulkadir Aman Hassen ,&nbsp;Manzoore Elahi M. Soudagar ,&nbsp;Yasser Fouad ,&nbsp;Irfan Ali ,&nbsp;Sagar Shelare ,&nbsp;Shubham Sharma ,&nbsp;V.K. Bupesh Raja ,&nbsp;Abinash Mahapatro ,&nbsp;Sarabjit Singh ,&nbsp;Abhinav Kumar ,&nbsp;Ehab El Sayed Massoud ,&nbsp;Jasmina Lozanovic","doi":"10.1016/j.csite.2025.105991","DOIUrl":"10.1016/j.csite.2025.105991","url":null,"abstract":"<div><div>This study presents a computational fluid dynamics (CFD)-based grey relational analysis (GRA) using the Taguchi method for the parametric optimisation of a photovoltaic thermal (PVT) system. The objective of the study is to use the excess thermal energy to increase the amount of electricity produced by the PV systems. This study is distinguished by design factors such as tube configuration and geometry, operational conditions including mass flow rate and fluid inlet temperature, and external environmental parameters including ambient temperature and solar irradiation. This study employs a distinctive integration of CFD simulations with Grey Relational Analysis (GRA) to optimise photovoltaic thermal (PV/T) systems via multi-factor analysis. This approach optimises electrical and thermal efficiency, tackling essential performance compromises overlooked by traditional methods. This strategy enhances system efficiency and guides the design of modern, sustainable PVT systems. The research additionally highlights the need of mitigating hotspots in the photovoltaic panel and increasing the temperature of the cooling water outlet. The results indicate the significant impact of multiple factors on the GRA analysis of variance: flow pattern (6.52 %), tube area (0.53 %), mass flow rate (15.68 %), ambient temperature (4.42 %), and radiation (42.27 %). The Taguchi projected optimal configuration (A1B3C3D3E3F1) attained a GRG of 0.791, which closely corresponds with the simulated GRG of 0.752, thus illustrating the trustworthiness of the predictive model. Furthermore, the PV thermal system exhibited a significant improvement in multi-factor performance. The system attained a 16.19 % enhancement in thermal efficiency, a 17.34 % decrease in PV mean variation (indicating substantial hotspot mitigation), and a large temperature output increase of 7.99 °C. These enhancements highlight the system's ingenuity and its capacity to elevate photovoltaic thermal efficacy. This unique work integrates CFD simulations with Grey Relational Analysis (GRA) and the Taguchi technique to create a multi-objective optimisation strategy that properly forecasts the most important PVT system performance parameters. Results show great computational precision (uncertainty &lt;10⁻⁴) and 95.1 % agreement between predicted and simulated results, offering a reliable foundation for optimising PVT system thermal and electrical efficiency.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 105991"},"PeriodicalIF":6.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636943","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":"Characterization of the pressure, temperature, and phase evolution during pipeline leakage in full-size ethane high-pressure gas pipeline","authors":"Jianbo Ma,&nbsp;Zihao Xiu,&nbsp;Zhenyi Liu,&nbsp;Mingzhi Li,&nbsp;Pengliang Li,&nbsp;Shuhong Li,&nbsp;Ranran Li","doi":"10.1016/j.csite.2025.106020","DOIUrl":"10.1016/j.csite.2025.106020","url":null,"abstract":"<div><div>A leak may occur in the ethane transport pipeline during operation, which brings serious pipeline transportation risks. Exploring the pressure, temperature and phase evolution during pipeline leakage is the basis for constructing pipeline safety technology. To this end, a full-scale ethane pipeline experimental platform was established to carry out leakage experiments at different diameters, and the pressure, temperature, and phase changes of the ethane inside the pipeline and the temperature changes of the pipeline outer wall were investigated. The experimental results show that during the ethane injection process, the turning point of the pressure increase rate is 4.26 MPa; the turning point of the temperature decrease rate is 14.26 °C and 12.07 °C. During the overall process of leakage, the ethane temperature showed the trend of \"near hot and far cold\" from the leakage port position. The critical diameter for the maximum temperature-difference and phase change time difference between the near and far ends of the leakage port is 15 mm, and the temperature-difference reaches 5.49 °C, the time difference of 121 s, which show a tendency of increasing and then decreasing when leakage diameter increase. In addition, the temperature of the outer wall of the pipeline shows the trend of \"near cold and far hot\" from the leakage port position, and the temperature of the center point of the pipeline is higher. The temperature-trough difference between different monitoring points shows a tendency to increase with the increase of leakage diameter, reaching a maximum of 5.81 °C. The conclusion of the study provides guidance for the investigation of the changing characteristics including temperature, pressure and phase state in the process of ethane pipeline leakage, which is helpful for the construction of pipeline safety technology system.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 106020"},"PeriodicalIF":6.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654625","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":"Numerical evaluation of low-grade producer gas flow and combustion characteristics in swirl combustor","authors":"Chai Yik Zhien ,&nbsp;K.A. Al-attab ,&nbsp;Ibrahim I. Enagi ,&nbsp;Abdul Rahman Mohamed ,&nbsp;Irfan Anjum Badruddin ,&nbsp;Sarfaraz Kamangar ,&nbsp;M. Ahmed Ali Baig","doi":"10.1016/j.csite.2025.106008","DOIUrl":"10.1016/j.csite.2025.106008","url":null,"abstract":"<div><div>Low-grade gas produced from waste biomass fuels is getting more attention as an additional heat source for boilers to cope with the rising constraints on carbon footprint. However, the main challenge is to achieve complete combustion of the gas with acceptable burner outlet temperature while maintaining simple and compact burner. Computational fluid dynamics was utilized to understand the hydrodynamic flow characteristics and combustion in the vane swirler geometry used in boilers. Low-grade producer gas from wood air-gasification was modeled and compared to pure syngas. The results are validated with experimental data and the accuracy of this work is ascertained. The effect of the combustion equivalence ratio and the different geometry parameters of swirl burner on flow and combustion characteristics were investigated. Elevation of swirl number at higher angles affected the mixing quality positively. Lean combustion at φ of 0.67 resulted in a significant drop in CO emissions down to around 1 ppm but with a considerable drop in chamber outlet temperature. On the other hand, stoichiometric combustion condition resulted in the highest temperature of 1891K while maintaining acceptable CO emissions of 47 ppm which represented the optimum operating condition. The best combustor geometry design was 1000 mm length, 150 mm diameter and 60^o swirler angle.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 106008"},"PeriodicalIF":6.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636262","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":"Preliminary development of a non-contact method for thermal characterization of building walls: Laboratory evaluation","authors":"Luca Evangelisti ,&nbsp;Edoardo De Cristo ,&nbsp;Claudia Guattari ,&nbsp;Paola Gori ,&nbsp;Tullio De Rubeis ,&nbsp;Salvatore Monteleone","doi":"10.1016/j.csite.2025.106012","DOIUrl":"10.1016/j.csite.2025.106012","url":null,"abstract":"<div><div>This work provides a preliminary experimental investigation with a laboratory setup for proposing a novel enhanced thermometric method, for the thermal characterization of building walls, utilizing a non-contact approach based on infrared thermometry. The goal is a non-invasive application in building diagnostics, particularly in heritage and architecturally sensitive contexts. This study aims to investigate two issues: (i) testing a procedure to automatically process data for determining suitable heat transfer coefficients when calculating heat fluxes when the thermometric method is applied; (ii) understanding the role of infrared thermometers in replacing contact temperature sensors in a proposed enhanced version of the thermometric method for heat flux calculation. Heat fluxes acquired through a commonly used sensor were compared with those computed through the proposed method based on convective and radiative heat transfer assessments. The findings validate the viability of the indirect procedure for calculating heat flux. However, discrepancies in surface temperature measurements were observed between contact and infrared sensors, with differences below 0.5 °C. This suggests that infrared thermometers may require careful consideration as they can underestimate surface temperatures, potentially necessitating corrections to obtain heat flux values comparable to those from conventional heat flux sensors.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 106012"},"PeriodicalIF":6.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143609744","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":"Assessment of three-dimensional distribution of thermal environment: A field study on outdoor spaces of academic building in severe cold region","authors":"Bo Wang ,&nbsp;Wenlong Zhang ,&nbsp;Luoqi Jia ,&nbsp;Bingbing Han ,&nbsp;Hongyu Zhao","doi":"10.1016/j.csite.2025.105976","DOIUrl":"10.1016/j.csite.2025.105976","url":null,"abstract":"<div><div>In the context of rapid urbanization, challenges like the urban heat island effect have significantly reduced the efficiency and usability of outdoor spaces, especially in cold regions where maximizing summer usage of outdoor areas holds more value. This study aims to explore the potential of utilizing roof spaces at various heights of campus buildings as an effective supplement to existing public spaces, with the objective of alleviating crowd density and enhancing thermal comfort. The research involves the collection of data regarding the physical characteristics of outdoor environments at different elevations, as well as student perceptions of thermal comfort., It also ranks meteorological factors that influence thermal comfort at varying heights, and identifies suitable evaluation indicator. Notably, a discernible trend in the variation of thermal neutral temperature with elevation is observed, alongside variations in thermal comfort ranges at different heights. Specifically, the neutral temperature recorded at 1.5 m during the summer was 16.40 °C, at 3.5 m it was 19.09 °C, at 5.5 m it was 18.40 °C, and at 13.5 m it reached 21.93 °C. Additionally, the findings indicate that female participants generally experience broader intervals of thermal neutral temperatures compared to their male counterparts. Furthermore, students from southern regions (south of 34°N) exhibit greater sensitivity to temperature changes at elevated locations compared to those from northern regions (north of 34°N), while northern students show more sensitivity near ground level.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 105976"},"PeriodicalIF":6.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593340","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":"The effects of viscous dissipation and nanofluids as working fluid on the thermal development in an isothermal microchannel","authors":"W.H. Koh,&nbsp;G.M. Chen","doi":"10.1016/j.csite.2025.105983","DOIUrl":"10.1016/j.csite.2025.105983","url":null,"abstract":"<div><div>This study investigated the effects of viscous dissipation on the characteristics of thermal development in an isothermal-isothermal circular microchannel, also known as Graetz Brinkman problem, analytically and highlighted a critical Brinkman number of approximately 1.12 that delineates Nusselt number trends across Brinkman numbers ranging from 0.5 to 1.2. The findings revealed instances where the heat transfer direction changes, and the mean fluid temperature exceeds the wall temperature, leading to thermal development characterisation when the Brinkman number is lower than the critical value. The heat transfer coefficient beyond the axial distance where the bulk mean temperature equals the wall temperature marks the overriding effect of viscous dissipation over convection heat transfer. Additionally, local heat transfer coefficients across 30-μm, 50-μm, and 100-μm circular microchannels cooled by two types of working fluids: water and a 5 vol% Al₂O₃-water nanofluids are compared. Results suggested that nanofluid outperforms water near the entrance of the microtube but starts to deteriorate further from the entrance owing to viscous dissipation effects and is exacerbated with an increasing Reynolds number. A more significant viscous dissipation effect in nanofluids tends to expedite the thermal development and renders its role as a coolant ineffective in an isothermal microchannels.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 105983"},"PeriodicalIF":6.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636944","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":"2D flame temperature and soot concentration reconstruction from partial discrete data via machine learning: A case study","authors":"Mingfei Chen ,&nbsp;Renhao Zheng ,&nbsp;Xuan Zhao ,&nbsp;Dong Liu","doi":"10.1016/j.csite.2025.106005","DOIUrl":"10.1016/j.csite.2025.106005","url":null,"abstract":"<div><div>Flame reconstruction provides a valuable tool for understanding the thermodynamic properties of combustion. Based on the interrelation between different flame locations, this study proposed a new machine learning-based approach to reconstruct the overall 2D temperature and soot concentration from partial discrete data. Six cases were used to evaluate the reconstruction performance of different models (ANN, SVR, and RF), with accuracy assessed through visual observation, scatter plots, and error statistics. Results indicated that the machine learning models could well reconstruct the overall flame field from partial data, with their performance ranked as follows: RF &gt; ANN &gt; SVR. Moreover, the prediction accuracies of ANN, SVR, and RF for flame temperature were all superior to those for soot concentration. For the reconstruction of the temperature fields in Cases 1–3, the predicted values from the optimal RF model closely matched the measurement. For the reconstruction of soot concentration information in Cases 4–6, the predicted values from the RF also showed a similarity to the measurement. This methodology advanced flame reconstruction by leveraging the interrelation between data from different flame locations, enhancing the utilization efficiency of limited data and reducing the reliance on measurement resources.</div></div>","PeriodicalId":9658,"journal":{"name":"Case Studies in Thermal Engineering","volume":"69 ","pages":"Article 106005"},"PeriodicalIF":6.4,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580321","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}