Article
Thermodynamics
Amitav Tikadar, Satish Kumar
Summary: In this paper, machine learning methods are used to predict the thermal-hydraulic performance of metal foam heat sinks (MFHSs). Five different ML-based regression models have been developed and compared. The results show that, except for KNN, all ML algorithms can predict the thermal-hydraulic performance reasonably well, with SVR and ANN outperforming other models on independent datasets.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
J. S. Shijo, N. Behera
Summary: This study investigates the use of machine learning techniques to estimate the pressure drop in fluidized dense phase conveying of powders. Experimental data of pneumatic conveying were used for training and four different ML algorithms were selected for prediction. The XGBoost model performed the best with an error margin of ±5% in training and testing data, and ±10% in validating data.
JOURNAL OF APPLIED FLUID MECHANICS
(2023)
Article
Engineering, Civil
Surendra Nadh Somala, Karthika Karthikeyan, Sujith Mangalathu
Summary: This paper explores the use of machine learning algorithms for accurate estimation of fundamental time period in infrastructure systems, demonstrating superior performance compared to existing methods through advanced techniques such as bagging and boosting.
Article
Construction & Building Technology
Anas Abdulalim Alabdullah, Mudassir Iqbal, Muhammad Zahid, Kaffayatullah Khan, Muhammad Nasir Amin, Fazal E. Jalal
Summary: This study investigates the non-linear capabilities of two machine learning prediction models, Light GBM and XGBoost, for predicting RCPT values. The study found that LightGBM surpasses XGBoost in prediction accuracy and that the W/B ratio and MK replacement are of significant importance in resisting chloride penetration.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Marine
Damjan Bujak, Tonko Bogovac, Dalibor Carevic, Suzana Ilic, Goran Loncar
Summary: This study successfully predicts the spatial variability of nourishment requirements on the Croatian coast using artificial neural networks (ANNs), with R and MSE values of 0.87 and 2.24 x 10(4) for the test set. Fetch length and beach orientation were found to be the most important parameters contributing to the ANN's predictive ability, as they govern wind wave height and direction, acting as proxies for forcing.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Forestry
Assaf Shmuel, Eyal Heifetz
Summary: Wildfires are a significant natural hazard that cause deforestation, carbon emissions, and loss of lives. This study applies machine learning methods to predict wildfire occurrence and burned areas, achieving high accuracy and revealing the influence of various factors on wildfires.
Article
Transportation
Gordon Zhou, Amir Etemadi, Austin Mardon
Summary: Inaccurate forecasts of operating expenditures during the planning phase for new LRT projects in the United States underestimated future costs. It is important for transit agencies to produce accurate planning estimates to secure funding for future operations. This study developed a more accurate predictive model using traditional statistical analysis and machine learning algorithms.
JOURNAL OF PUBLIC TRANSPORTATION
(2022)
Article
Thermodynamics
Matthew T. Hughes, Sarah M. Chen, Srinivas Garimella
Summary: Machine learning regression models were developed to predict heat transfer and pressure drop during condensation of zeotropic mixtures in micro- and macro-channels. SVR performed best in predicting Nusselt number, while GB performed best in predicting two-phase friction factor. Shapley analysis was used to determine important parameters for heat transfer and pressure drop predictions.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Yichuan He, Chengzhi Hu, Hongyang Li, Xianfeng Hu, Dawei Tang
Summary: This study predicts bubble departure frequency in subcooling flow boiling using machine learning-based approaches. By comparing a consolidated dataset and nine regression models, it is found that the XGBoost model performs the best in predicting bubble departure frequency, providing a reliable tool.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Polymer Science
Muhammad Nasir Amin, Babatunde Abiodun Salami, Muhammad Zahid, Mudassir Iqbal, Kaffayatullah Khan, Abdullah Mohammad Abu-Arab, Anas Abdulalim Alabdullah, Fazal E. Jalal
Summary: This research evaluated the nonlinear capabilities of three ensemble models for predicting the interfacial bond strength (IBS) of fiber-reinforced polymer (FRP) laminates on concrete prisms containing grooves. The study found that the LIGHT GBM model had the highest accuracy and prediction ability.
Article
Engineering, Environmental
Shifa Zhong, Kai Zhang, Dong Wang, Huichun Zhang
Summary: Developed a machine learning-assisted method for an environmental task, constructed QSAR models using deep neural networks and gradient boosting algorithms for predicting the reactivity of organic compounds towards HO radicals, and achieved satisfactory predictive performance with an ensemble model.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Oceanography
Md. Hasibul Hasan, Asib Ahmed, K. M. Nafee, Amzed Hossen
Summary: The geographical location of Bangladesh makes it vulnerable to natural disasters, particularly flooding in the coastal area. This study used machine learning algorithms and GIS techniques to assess the coastal flood susceptibility by considering nine flood conditioning factors. The Random Forest model was found to be the most accurate, followed by XGBoost and KNN. The study identified the most flood susceptible areas and population in the coastal districts and emphasized the importance of understanding the situation from a humanistic perspective for effective policymaking and disaster resilience.
OCEAN & COASTAL MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Shantanu Purohit, E. Y. K. Ng, Ijaz Fazil Syed Ahmed Kabir
Summary: This paper validates three machine learning algorithms for estimating velocity and turbulence intensity in the wake of a wind turbine, and compares them with existing analytical models. The results demonstrate that machine learning algorithms can predict velocity and turbulence intensity more accurately than traditional analytical models.
Article
Thermodynamics
N. Longmire, D. T. Banuti
Summary: This paper investigates the phenomenon of pseudo boiling as a potential mechanism for heat transfer deterioration (HTD) at supercritical pressures. The study utilizes computational fluid dynamics and thermodynamic analysis to explore the underlying physics of pseudo boiling. The results show that pseudo boiling theory accurately predicts the pressure and temperature regions susceptible to HTD.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Multidisciplinary
Taimur Ahmed, Muhammad Tahir, Mei Xian Low, Yanyun Ren, Sherif Abdulkader Tawfik, Edwin L. H. Mayes, Sruthi Kuriakose, Shahid Nawaz, Michelle J. S. Spencer, Hua Chen, Madhu Bhaskaran, Sharath Sriram, Sumeet Walia
Summary: This study introduces a neuromorphic imaging element based on a 2D black phosphorus material fully modulated by light, achieving visual memory, wavelength-selective multibit programming, and erasing functions. It has been successfully applied to machine learning for number classification and image recognition.
ADVANCED MATERIALS
(2021)
Article
Thermodynamics
Yue Qiu, Deepak Garg, Liwei Zhou, Chirag R. Kharangate, Sung-Min Kim, Issam Mudawar
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Liwei Zhou, Deepak Garg, Yue Qiu, Sung-Min Kim, Issam Mudawar, Chirag R. Kharangate
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Haeun Lee, Minsoo Kang, Ki Wook Jung, Chirag R. Kharangate, Sael Lee, Madhusudan Iyengar, Chris Malone, Mehdi Asheghi, Kenneth E. Goodson, Hyoungsoon Lee
Summary: This study aims to develop artificial neural-network-based tools for predicting the thermal and hydraulic performance of micro-pin fin heat sinks used for high-heat-flux electronic devices. Results show that micro-pin fin heat sinks have effective heat transfer characteristics, but there is still a lack of a universal approach for predicting the frictional pressure drop in pin fin arrays for various operating conditions and geometric shapes.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Daewoong Jung, Haeun Lee, Daeyoung Kong, Eunho Cho, Ki Wook Jung, Chirag R. Kharangate, Madhusudan Iyengar, Chris Malone, Mehdi Asheghi, Kenneth E. Goodson, Hyoungsoon Lee
Summary: This study investigates the thermal and hydrodynamic characteristics of various micro-pin fin arrays to maximize heat dissipation while minimizing energy consumption. Experimental data and a consolidated database from literature were used to explore optimized geometric and operating conditions in micro-pin fin arrays for a wide range of parameters. New empirical correlations were formulated based on the consolidated database to describe the heat transfer and pressure drop in the micro-pin fin arrays.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Cho-Ning Huang, Kuan-Lin Lee, Calin Tarau, Yasuhiro Kamotani, Chirag R. Kharangate
Summary: A computational fluid dynamics (CFD) model was developed to predict the behavior of a variable conductance thermosyphon in different operating temperatures, showing accurate results compared to experimental data.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Muhammad Noman Hasan, Ran An, Asya Akkus, Derya Akkaynak, Adrienne R. Minerick, Chirag R. Kharangate, Umut A. Gurkan
Summary: Paper-based microchip electrophoresis shows potential for bringing lab tests to the point of need, but issues with high electrical values causing pH and temperature changes can impact the accuracy and reproducibility of tests. The development of HemeChip aims to provide low-cost, rapid, and accurate electrophoresis tests for hemoglobin analysis. Through pH and temperature characterization, and acid pretreatment of cellulose acetate paper, researchers were able to mitigate shifts and create a stable environment for reproducible hemoglobin electrophoresis separation on HemeChip.
Article
Thermodynamics
Ari Bard, Yue Qiu, Chirag R. Kharangate, Roger French
Summary: This study accurately predicts the heat transfer coefficient during flow boiling in mini/micro-channels using data science methods. Feature analysis and machine learning algorithms are utilized to select and combine appropriate input values, and compared with existing correlations. The results show that the support vector machine model performs the best.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Cho-Ning Huang, Kuan-Lin Lee, Calin Tarau, Yasuhiro Kamotani, Chirag Kharangate
Summary: A new design of hot reservoir variable conductance heat pipe (VCHP) is proposed and investigated in this study. The design aims to provide tighter thermal control performance than traditional cold reservoir VCHP, while also solving the issue of excess working fluid accumulation in the hot reservoir. It is shown that the proposed design, known as self-purging hot reservoir VCHP (SPHR-VCHP), can significantly enhance the removal of excess working fluid vapor through a pressure-induced flow.
APPLIED THERMAL ENGINEERING
(2023)
Review
Thermodynamics
Yue Qiu, Tinh Vo, Deepak Garg, Hyounsoon Lee, Chirag R. Kharangate
Summary: In this study, an Artificial Neural Network (ANN) is used to accurately predict heat transfer coefficients for saturated flow boiling in mini/micro channels. The ANN model is optimized using a comprehensive physics-based and data-driven approach, and a database of 16,953 data points is used for analysis. The optimized ANN model achieves superior results compared to universal correlations or prior machine learning methods.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
R. Deepak Selvakumar, Daeyoung Kong, Hyeon Kyun Lee, Chirag R. Kharangate, Jaiyoung Ryu, Hyoungsoon Lee
Summary: A three-dimensional numerical analysis was performed to investigate the flow and conjugate heat transfer in a microchannel with the electric-field-induced Onsager-Wien effect. A novel design was proposed to enhance the heat transfer by inducing a pseudo-roughness effect in the microchannel. The results showed that the pseudo-roughness produced by the Onsager-Wien effect significantly improved the heat transfer in the microchannel with a trivial amount of additional power consumption.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Jiayuan Li, Lucas E. O'Neill, Michael G. Izenson, Chirag R. Kharangate
Summary: This study aims to develop a predictive tool for accurately estimating the heat transfer behavior during the filling process of cryogenic fluids. A new generalized correlation set for predicting critical heat flux (CHF) is developed, and a new pool boiling test facility is built to generate CHF data. The experimental data is combined with worldwide data to create a consolidate database, and a comprehensive assessment of prior CHF correlations is conducted. A new correlation model for flat plate and multipliers for curved surfaces are established, and a parameter considering the thickness and thermal properties of the quenching surface is generated.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Sanghyeon Chang, Youngjoon Suh, Chinmay Shingote, Cho-Ning Huang, Issam Mudawar, Chirag Kharangate, Yoonjin Won
Summary: This study utilizes computer vision techniques and models to extract physical features of bubbles in flow boiling and predicts critical heat flux based on these features. This vision-based approach has the potential to revolutionize the study of thermofluidics by providing visual insights that agree with experimental data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Yue Qiu, Hyoungsoon Lee, Chirag R. Kharangate
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)