Article
Thermodynamics
Rajendran Prabakaran, Mohammad Salman, Poongavanam Ganesh Kumar, Dongchan Lee, Sung Chul Kim
Summary: This study investigated the evaporation heat transfer coefficient and two-phase frictional pressure drop of R1234yf in a brazed plate heat exchanger with offset strip fins. The results showed that the evaporation heat transfer coefficient was significantly influenced by the mass flux and vapor quality, while the two-phase frictional pressure drop increased with the mass flux, vapor quality, and heat flux, but decreased with the saturation temperature. New correlations were proposed for forecasting the Nusselt number and friction factor of R1234yf with reasonable accuracy.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Rajendran Prabakaran, Mohammad Salman, Poongavanam Ganesh Kumar, Dongchan Lee, Sung Chul Kim
Summary: This study investigated the evaporation characteristics of the R290 + CF3i mixture in a plate heat exchanger and found that nucleate boiling is quenched at lower vapor quality. The two-phase frictional pressure drop increases with mean vapor quality. The heat transfer coefficient is largely augmented with increases in mass flux.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Mohammad Salman, Rajendran Prabakaran, Dongchan Lee, Sung Chul Kim
Summary: This study experimentally investigated the saturated flow boiling characteristics of R290/R1270 mixture and pure R290 in a plate heat exchanger with offset strip fins. The results showed that convection dominated the boiling process at higher vapor qualities, while nucleate boiling dominated at lower vapor qualities. The heat-transfer coefficient and frictional pressure drop of R290/R1270 were strongly influenced by the mass flux range. Correlations for R290/R1270 in the form of Nusselt number and the two-phase friction factor have been established with high reliability.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Hasan Kücük
Summary: Channels with small hydraulic diameters improve the overall heat transfer coefficient and compactness of shell and tube heat exchangers. This study experimentally investigated the effects of mini-channels on the heat transfer coefficient and pressure drop performance. The results showed that mini-channels significantly increased the heat transfer coefficient and had a higher pressure drop.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Yun Mo Ko, Jae Hoon Jung, Sangho Sohn, Chan Ho Song, Yong Tae Kang
Summary: The study analyzed the effects of mass flux, heat flux, and condensation pressure on the condensation heat transfer coefficient and frictional pressure drop of R124 in plate heat exchangers with different chevron angles. Correlations for Nusselt number and friction factor were developed based on experimental data, and correction factors were introduced for validation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Kitti Nilpueng, Tanachon Chomamuang, Mehrdad Mesgarpour, Omid Mahian, Somchai Wongwises
Summary: This study proposes a plate heat exchanger partially filled with metal foam and investigates the effects of mass flux, foam groove width, and pore density on heat transfer coefficient and pressure drop. The results show that reducing groove width and increasing pore density lead to higher heat transfer coefficient and pressure drop.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Abbas J. S. Al-Lami, Eugeny Y. Kenig
Summary: The paper introduces an innovative heat exchanger design called internally channeled tube (ICT), which has a larger heat transfer area compared to conventional heat exchangers. A three-dimensional numerical model is developed to study the fluid dynamics and heat transfer in the ICT. The focus of the paper is on the experimental investigation of the ICT under turbulent flow conditions, including the maldistribution issue. The experimental results are used to validate the numerical model, with deviations below 6.5% for pressure drop and below 13% for heat transfer coefficient.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Dan Zheng, Jiawang Yang, Jin Wang, Stephan Kabelac, Bengt Sunden
Summary: This paper experimentally investigated the effect of various magnetic fields on the performance of a plate heat exchanger filled with ferrofluids. It was found that with the proper arrangement of magnets, both thermal performance and pressure drop of the heat exchanger can be improved.
Article
Thermodynamics
Olga Arsenyeva, Jiri Jaromir Klemes, Eugeny Klochock, Petro Kapustenko
Summary: This study presents the results of mathematical modelling and experimental study on plate heat exchangers (PHEs) in steam-air mixture condensation. The research shows that the heat transfer area and pressure drop of PHE can vary under different conditions. The optimal corrugation angle and height for plates designed for specific tasks can be selected by solving a future optimization problem with the developed mathematical model.
Article
Thermodynamics
Olga Arsenyeva, Olexandr Perevertaylenko, Leonid Tovazhnyanskyy, Pavlo Arsenyev, Petro Kapustenko
Summary: The requirements for sustainable development in modern society due to climate change call for more actions towards environmental protection, particularly in industrial processes through increased heat recovery. The development of new efficient heat transfer equipment with enhanced heat transfer characteristics for different processes is essential. This study proposes a novel design of a plate type heat exchanger called the panel plate heat exchanger and presents empirical correlations for friction factor and heat transfer coefficients based on experimental investigations. Compared to pillow-plate heat exchangers, the panel plate heat exchanger achieves up to a 28% improvement in heat transfer with a 48% increase in friction factor. The calculated design for water heating shows that the investigated panel heat exchanger with multi-pass channels arrangement has a heat transfer area close to that of a pillow-plate heat exchanger, but with potential for further reduction through optimization of its geometrical characteristics.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Mingrui Sun, Lunxiang Zhang, Chengzhi Hu, Jiafei Zhao, Dawei Tang, Yongchen Song
Summary: Optimizing the pore structure of metal foam is considered a feasible approach for improving overall heat transfer performance. The study found that throat area could not effectively optimize heat transfer performance, but the area goodness factor j/f was higher than conventional Kelvin cells.
Article
Thermodynamics
Mohammad Salman, Rajendran Prabakaran, Poongavanam Ganesh Kumar, Dongchan Lee, Sung Chul Kim
Summary: An inclusive experimental study was conducted to explore the features of heat transfer coefficient and frictional pressure drop of R290 in a brazed plate heat exchanger. The findings revealed that nucleate boiling dominated at lower vapor qualities, while convection-dominated at higher vapor qualities. Empirical correlations for Nusselt number and friction factor were developed for R290 with a mean absolute error of 10% and 14% respectively, taking into account the influence of equivalent and liquid Reynolds numbers and the liquid and vapor densities.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Olga Arsenyeva, Jiri Jaromir Klemes, Leonid Tovazhnyanskyy, Eugeny Klochok, Petro Kapustenko
Summary: The condensation of vapours in the presence of non-condensable gas is a common phenomenon in many industries. The efficient use of heat exchanger networks can increase energy usage efficiency. Plate heat exchangers with enhanced heat and mass transfer are effective in these processes. This study proposes a method for the preliminary selection of plate heat exchangers for steam condensation. The method uses a mathematical model and is implemented as a computer program for HEN optimization.
Article
Thermodynamics
Ahmet Talat Inan, Hasan Koten, Mehmet Akif Kartal
Summary: Heat exchangers are widely used in industries where heat transfer is possible and in sectors where energy efficiency is important. By analyzing the effect of different baffle plate intervals on fluid behavior, it is concluded that the spacing between baffle plates in the conventional one-piece shell and tube heat exchanger varies with flow rate.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2023)
Article
Thermodynamics
Jiuxin Ning, Xiaodong Wang, Yajing Sun, Chenggang Zheng, Shengwu Zhang, Xi Zhao, Changyong Liu, Wentao Yan
Summary: Three types of PFHX were manufactured using LPBF technology, with the PFHX with twisted fins showing superior thermal performance and the PFHX with improved rectangular fins demonstrating the best overall performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Rakesh Chaudhari, Jay Vora, L. N. Lopez de Lacalle, Sakshum Khanna, Vivek K. Patel, Izaro Ayesta
Summary: In the current manufacturing scenario, implementing new technologies is crucial for overcoming challenges such as achieving component accuracy and high quality. WEDM is a non-traditional machining method suitable for smart materials like shape memory alloys. The study optimized machining characteristics like material removal rate and surface roughness using the HTS algorithm.
Article
Computer Science, Artificial Intelligence
Bansi D. Raja, Vivek K. Patel, Vimal J. Savsani, Ali Riza Yildiz
Summary: This study compares the performance of various swarm intelligence-based algorithms proposed in 2020-2021 for real-life constraint optimization problems, evaluates the effects of constraint handling methods and output constraints, and presents statistical analysis to determine the significance and ranking of the algorithms.
ARTIFICIAL INTELLIGENCE REVIEW
(2023)
Article
Thermodynamics
Rahul Deharkar, Anurag Mudgal, Vivek Patel
Summary: The design and experimental performance of a detachable shell vertical tube evaporator with variation in feed water temperature is studied. The modified evaporator operates with a thin film of evaporating feed water on the outer surface of fluted tubes, resulting in high heat transfer coefficient. The presence of salt deposits on the outer surface makes the system easy to clean and maintain. Experimental results show that the evaporator performs well under certain conditions.
HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Rakesh Chaudhari, Parth Prajapati, Sakshum Khanna, Jay Vora, Vivek K. Patel, Danil Yurievich Pimenov, Khaled Giasin
Summary: Shape memory alloy, particularly nickel-titanium combination, can regain original shape after heating. Adding Al2O3 nanopowder in the machining process can enhance the properties of the alloy. The study found that Al2O3 nanopowder has the highest contributing effect, while T-on is the most influential parameter for surface roughness and recast layer thickness. The use of optimization algorithms generated optimal points for the machining process. The regression model and TLBO algorithm show great effectiveness in the machining of nanopowder-mixed WEDM process for Nitinol SMA.
Article
Chemistry, Multidisciplinary
Jay Vora, Nipun Parikh, Rakesh Chaudhari, Vivek K. Patel, Heet Paramar, Danil Yurievich Pimenov, Khaled Giasin
Summary: This study focused on the optimization of process parameters in multi-layer multi-bead deposition for wire-arc additive manufacturing (WAAM) using gas metal arc welding (GMAW). Regression equations were established and optimized using the Teaching-learning-based optimization (TLBO) algorithm. The success of the model and algorithm were validated through experimental trials. The optimum parametric settings for multi-layer deposition were determined, leading to successful manufacturing of a disbond-free multi-layer structure.
APPLIED SCIENCES-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Bhaumik Modi, Anurag Mudgal, Bansi D. Raja, Vivek Patel
Summary: This article presents a design methodology and test results of a small-scale single effect LiBr/water absorption refrigeration system with a capacity of 1.5 Ton. The experiments show that the system achieves a maximum COP of 0.35 at a generator temperature of 92C, and increasing the evaporator temperature leads to an increase in the cooling load. The break-even point for this small-scale absorption refrigeration system is determined to be 4.5 years, making it an economically viable option.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Chemistry, Analytical
Rakesh Chaudhari, Aniket Kevalramani, Jay Vora, Sakshum Khanna, Vivek K. Patel, Danil Yurievich Pimenov, Khaled Giasin
Summary: Nitinol shape memory alloys are widely used in various industries, and precise machining of Nitinol SMA is crucial for achieving better surface quality and geometric accuracy of devices. This study investigated the impact of near-dry WEDM technique on reducing environmental impact, and found the optimal combination of process parameters through parameter optimization.
Article
Materials Science, Multidisciplinary
Rakesh Chaudhari, Heet Parmar, Jay Vora, Vivek K. Patel
Summary: The study aimed to optimize gas metal arc welding-based wire-arc additive manufacturing variables for bead geometries on an SS 316L substrate. Multivariable regression equations were generated, and ANOVA was used to investigate the feasibility of the obtained regression equations. Heat transfer search optimization resulted in optimal combinations, with maximum bead height and minimum bead width achieved.
Article
Chemistry, Physical
Rakesh Chaudhari, Yug Shah, Sakshum Khanna, Vivek K. Patel, Jay Vora, Danil Yurievich Pimenov, Khaled Giasin
Summary: The effect of Al2O3 nano-powder on the EDM of Nitinol SMA was investigated. The concentrations of nano-powder, pulse-on-time, pulse-off-time, and current were selected as parameters for measuring the material removal rate, surface roughness, and tool wear rate. The study found that Al2O3 powder concentration, pulse-off-time, and pulse-on-time significantly affected the respective performance measures. The TLBO technique was employed to find the optimal parametric settings, resulting in improved output measures. The importance of different user and application requirements was considered, and SEM analysis confirmed the effectiveness of the study.
Article
Engineering, Multidisciplinary
Bansi D. Raja, Vivek K. Patel, Ali Riza Yildiz, Prakash Kotecha
Summary: This paper compares the performance of scientific law-inspired optimization algorithms for real-life constrained optimization applications. The algorithms are evaluated using a constrained engineering application of the Stirling heat engine system. The effects of constraint handling methods and output constraints on algorithm performance are analyzed and presented.
ENGINEERING OPTIMIZATION
(2023)
Article
Chemistry, Multidisciplinary
Rakesh Chaudhari, Izaro Ayesta, Mikesh Doshi, Sakshum Khanna, Vivek K. Patel, Jay Vora, Luis Norberto Lopez de Lacalle
Summary: Nickel-based superalloys are widely used in various fields, but their high hardness poses challenges in the fabrication process. This study explores the precise machining of a specific superalloy using wire electrical discharge machining (WEDM) and evaluates the influence of multi-walled carbon nanotubes (MWCNTs) through a multi-objective optimization. The research indicates that adjusting machining variables can effectively impact material removal rate, recast layer thickness, and surface roughness. Additionally, the addition of MWCNTs significantly improves machining performance.
Article
Engineering, Manufacturing
Jay Vora, Yug Shah, Sakshum Khanna, Vivek K. Patel, Manoj Jagdale, Rakesh Chaudhari
Summary: This study identified current, pulse-off-duration (Toff), and pulse-on-duration (Ton) as vital input factors for the WEDM process of Ti6Al4V. Empirical models were generated and validated using ANOVA, showing a significant impact of these factors on material removal rate (MRR) and surface roughness (SR). Additionally, the use of expanded graphite (EG) nano-powder was found to improve the WEDM process, increasing MRR by 45.35% and reducing SR by 36.16%.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2023)
Article
Chemistry, Physical
Jay Vora, Rudram Pandey, Pratik Dodiya, Vivek Patel, Sakshum Khanna, Vatsal Vaghasia, Rakesh Chaudhari
Summary: This study investigates and optimizes the bead geometries of SS-309L using a GMAW-based WAAM process. The Box-Behnken design approach is used for trials, and regression models are developed. The optimized parameters yield a maximum BH of 9.48 mm and a minimum BW of 5.90 mm for single-layer depositions.
Article
Engineering, Electrical & Electronic
Venish Suthar, Vinay Vakharia, Vivek K. K. Patel, Milind Shah
Summary: Intelligent fault diagnosis is crucial for timely information of mechanical components, especially rolling element bearings. This study proposes a novel approach for reliable compound fault identification in bearings with limited experimental data. Vibration signals from single ball bearings with compound faults and varied rotational speeds are pre-processed using the Hilbert-Huang transform and Kurtogram. Additional Kurtogram images are generated using the multiscale-SinGAN model to effectively train machine-learning models. Metaheuristic optimization algorithms are applied to feature vectors for identifying relevant features. Three machine-learning models are used for compound fault identifications, with extreme learning machines achieving 100% ten-fold cross-validation accuracy. Support vector machines achieve a minimum ten-fold cross-validation accuracy of 98.96%.
Proceedings Paper
Materials Science, Multidisciplinary
Aditya Nema, Vivek Patel, Abhishek Kumar, Ankit Oza, Ashish B. Jagani
Summary: This paper focuses on the optimization of process parameters for electrochemical discharge machining (ECDM) to effectively machine materials with poor machinability, such as glass, carbon fiber, composites, and silica reinforced composites. The objective is to maximize material removal rate and minimize tool wear rate.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Thermodynamics
Yunxia Ma, Fei Liu, Honggang Pan, Hongjian Zhang, Shuxia Yan, Ailing Zhang
Summary: This paper proposes a dynamically tunable and switchable perfect infrared absorber that exhibits excellent electrical regulation performance and high absorptance. The absorption mechanism is explained using a multiple interference model, and it is proven to be polarization insensitive.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
F. J. dos Santos, G. S. M. Martins, M. Strobel, L. Beckedorff, K. V. de Paiva, J. L. G. Oliveira
Summary: This study investigates the effects of inlet conditions and plate's features on the thermal-flow performance of a gasket plate heat exchanger (GPHE) and assesses the impact of a modified tightening distance on its performance. No systematic study on the combined effects of inlet conditions and assembly accuracy on GPHE performance has been conducted before.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Alok K. Ray, Dibakar Rakshit, K. Ravi Kumar, Hal Gurgenci
Summary: The low thermal conductivity of phase change materials limits the heat transfer rate and application of latent heat storage systems. This numerical study examines the impact of two passive heat transfer enhancement techniques on the thermal performance of a latent heat storage system. The results show that the orientation and position of the heat transfer fluid tube have significant effects on the charging duration, while the discharging duration remains unchanged. The combined effect of orientation and eccentricity reduces the charging duration, but increases the discharging duration compared to the concentric domain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yalu Han, Yanlong Wang, Chenyang Liu, Xinmin Hu, Yin An, Zhengcai Li, Jiaxun Jiang, Lizhi Du
Summary: This paper investigates the calculation method of thermal conductivity in NAPLs-contaminated soils. By establishing NAPLs-contaminated soil models and using the Lattice Boltzmann Method (LBM) for calculation, an optimized three-dimensional model with high computational accuracy and efficiency is obtained. The study also finds that saturation and Nz parameters have a significant impact on calculation time, while the thermal conductivity of the two-dimensional model is more sensitive to anisotropy. The influence of porosity and NAPLs content on thermal conductivity should be considered during in-situ thermal desorption.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Mostafa Taha, Song Zhao, Aymeric Lamorlette, Jean-Louis Consalvi, Pierre Boivin
Summary: For the first time, large-eddy simulations (LES) of the near-field region of large-scale fire plumes were performed using a pressure-based Lattice Boltzmann method (LBM) with low-Mach number approximation. The simulations showed quantitative agreement with experimental data and were consistent with previously-published numerical studies. The study demonstrated the computational efficiency of the proposed LBM solver in tackling fire-induced flows, suggesting LBMs as a good alternative candidate for modeling fire-related problems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weixin Zhang, Yehang Xie, Yuqiang Ding, Zhao Liu, Zhenping Feng
Summary: This study investigated the impact of upstream slot leakage on the endwall film cooling characteristics of turbine blades. Pressure Sensitive Paint (PSP) technology was used to measure the film cooling characteristics, and numerical analysis was conducted to evaluate the aerodynamic performance. It was found that increasing the mass flow ratio of the upstream slot enhanced film cooling, decreased aerodynamic losses, and reduced the strength of passage vortex. However, reducing the distance between the slot and the blade leading edge only enhanced film cooling without affecting the leakage coverage area.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rui Zhang, Zhen-lei Li, Yan-sheng Zhang, Dong Chen, Guo Yuan
Summary: This study discusses the heat transfer behavior of different jet forms on steel tubes. The results show that the annular jet performs better in terms of cooling intensity and uniformity. The cooling performances of the two jet forms are similar when the steel tube size is small. Therefore, the planar jet can be considered for smaller diameters due to its simplicity, low cost, and convenience in application.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
A. R. Khoei, A. M. Orvati Movaffagh, A. Rezaei Sameti
Summary: This paper presents a comprehensive study on the thermo-mechanical characteristics of oxide-coated aluminum nano-powder. It is found that the thermal conductivity of oxide-coated aluminum nano-powder is significantly lower than that of the bulk aluminum, and it is affected by the density and temperature.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yanjin Wang, Jintao Xiong, Lingyu Chen, Zhihai Lv, Qian Wang
Summary: A solar radiation transfer model for spray cooling double skin facade (SC-DSF) is proposed in this study. The model is validated by experimental results and various influence factors are analyzed. The effectiveness of adjusting droplet coverage rate and size is also evaluated.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Bostjan Zajec, Blaz Mikuz, Anil Kumar Basavaraj, Marko Matkovic, Matej Tekavcic, Martin Draksler, Leon Cizelj, Bostjan Koncar
Summary: We have developed an advanced experimental setup to investigate flow and heat transfer in an annular channel. The setup allows heat transfer measurements and flow visualization using a temperature-controlled inner tube. Measurements can be conducted in both single-phase and two-phase flow regimes. The setup ensures a uniform velocity field in the annular channel using specially designed inlet and outlet headers. The inner copper tube is heated by water and contains turbulators for enhanced heat transfer and thermocouples for temperature measurement. A three-dimensional conjugate heat transfer CFD model has been developed and validated to accurately estimate heat losses in the setup. This study demonstrates the importance of numerical simulations in improving the interpretation of complex experimental results.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weijie Chen, Ke Wang, Yongqing Wang, Shantung Tu, Zunchao Liu, Huijuan Su
Summary: In this study, a novel gradient porosity transpiration cooling plate structure (GP-TCPS) is proposed to alleviate heat transfer deterioration caused by non-uniform temperature distribution in transpiration cooling plate structure (TCPS). Computational fluid dynamics (CFD) and response surface method (RSM) were used for qualitative and quantitative analysis of the flow and heat transfer of GP-TCPS. The optimized structure of GP-TCPS significantly improves temperature uniformity, injection pressure, and average cooling efficiency compared to traditional TCPS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
R. Essam, A. Elsaid, W. K. Zahra
Summary: This study presents a novel bioheat model for simulating heat transfer in skin tissue. The model offers an improved representation of thermal dynamics in the skin and has been validated using numerical solutions and experimental measurements. The study highlights the importance of incorporating vascular inlet parameters and thermal relaxation effects in the thermal profile, and suggests potential applications in thermal therapy and wound healing.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Dongbo Shi, Tao Xu, Zifeng Chen, Di Zhang, Yonghui Xie
Summary: The cooling structure design of turbine blades is crucial for the safety and reliability of the gas turbine set. This research investigates different arrangement schemes, including dimple/protrusion arrangements, to enhance the cooling performance. The results show that the arrangement scheme with both passes arranged by dimples has the best comprehensive thermal performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Emrehan Guersoy, Hayati Kadir Pazarlioglu, Mehmet Guerdal, Engin Gedik, Kamil Arslan
Summary: The thermo-hydraulic performance of Al2O3/H2O nanofluid with different nanoparticle shapes flowing in a sudden expansion tube with variable sudden expansion inclination angles and elliptical dimpled fins with different diameters were numerically investigated. The results showed that the nanoparticle shapes, sudden expansion inclination angles, and elliptical dimpled fin have significant impact on the thermo-hydraulic performance. This study reveals the novelty and importance of these factors in the research.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rukun Hu, Xinyu Huang, Xinyu Gao, Liu Lu, Xiaohu Yang, Bengt Sund
Summary: This study examines the impact of applying bottom cross-cut on PCM's spatial distribution in a horizontal LHTES unit using numerical simulation. The findings show that bottom cross-cut can improve the heat storage rate and natural convection heat transfer gain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
