Article
Thermodynamics
Mostafa Fathi, Mohammad Mahdi Heyhat, Mohammad Zabetian Targhi, Sajjad Bigham
Summary: Porous-fin microchannel heat sinks have the potential to improve the thermal and hydraulic performances of microelectronic cooling systems. However, the reduced effective thermal conductivity of porous fins compared to solid fins can negatively impact the thermal performance of the microchannel heat sinks. This research confirms that replacing solid with porous fins can simultaneously enhance the thermal and hydraulic performances of microchannel heat sinks.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Ambarish Maji, Tuhin Deshamukhya, Gautam Choubey, Anupam Choubey
Summary: In this study, perforated pin fins were found to have better heat transfer rates within a certain range of perforation number and size, with a significant decrease in pressure drop as the number and size of perforations increased. Triangular base plate geometry was identified to have higher system performance compared to square and circular plates.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Computer Science, Information Systems
Munseong Bae, Haejun Chung
Summary: In this study, we simulate the frequency-dependent dielectric constants of radiative cooling materials using a multi-pole Lorentz dispersion equation. We propose an efficient material modeling method for accelerated design of radiative cooling strategies.
Article
Thermodynamics
J. Zhang, H. Z. Han, Z. R. Li, H. G. Zhong
Summary: The study found that the heat transfer coefficient and cooling efficiency of the square pin-fin were higher than other types of pin-fins, with superior performance evaluation criteria. Empirical correlations were obtained for the Nusselt number and cooling efficiency of the different pin-fin forms, with prediction errors within acceptable ranges.
APPLIED THERMAL ENGINEERING
(2021)
Review
Chemistry, Multidisciplinary
Junwei Liu, Huajie Tang, Chongxu Jiang, Shiqiang Wu, Long Ye, Dongliang Zhao, Zhihua Zhou
Summary: With the exacerbation of global warming and extreme weather, the demand for cooling has been increasing and is expected to increase tenfold by 2050. Radiative sky cooling (RSC), a pollution-free and energy-efficient technology, has gained worldwide attention. Large-scale and scalable porous cooling materials have greatly contributed to the progress of this technology. This paper provides a critical review of porous cooling materials with the aim of advancing their commercial applications, covering design principles, pore-forming methods, recent progress, and potential applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Mechanical
Ali M. Nahal, Mohammad H. Nobakhti, Cyrus Aghanajafi, Morteza Khayat
Summary: In this study, an optimization of the maximum cooling of three radiant heat sources inside a closed square porous environment is performed. The main goal is to find the highest cooling rate in different amounts of five independent variables. The investigation showed the strong influence of the inclination angle of the porous medium on the flow lines and the maximum heat transfer achieved at an angle of inclination of zero degrees.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Aerospace
Hassan Saad Ifti, Tobias Hermann, Matthew McGilvray, Laura Larrimbe, Rowan Hedgecock, Luc Vandeperre
Summary: This study experimentally investigates the flow behavior of porous ultra-high-temperature ceramics for transpiration cooling of hypersonic vehicles. The results show that cleaning the sample surface can increase the permeability and the outflow velocity distribution exhibits good uniformity.
Article
Chemistry, Physical
Ting Chen, Yun Xu, Bo Huang, Yan Shi, Jiahu Zhang, Lei Li, Yaozhi Meng, Xuqing Li
Summary: To solve the problem of poor blade profile accuracy in aero-engine blade machining, simulations were conducted using DEFORM11.0 and ABAQUS2020 software to analyze blade deformation under heat-force fields. The influence of jet temperature and multiple changes in process parameters on blade deformation was studied through single-factor and BBD tests. A mathematical model correlating blade deformation with process parameters was established using the multiple quadratic regression method, and preferred process parameters were obtained through the particle swarm algorithm. The optimization of machining process parameters resulted in a maximum deformation of 0.0396 mm when the blade temperature was between -160°C and -180°C, meeting the allowable blade profile deformation error.
Article
Thermodynamics
Pawel Oclon, Stanislaw Lopata, Tomasz Stelmach, Mingjie Li, Jian-Fei Zhang, Hocine Mzad, Wen-Quan Tao
Summary: High-temperature fin-and-tube heat exchangers are commonly used in various industries, offering a large heat transfer area in a compact shape. However, ensuring uniform velocity distribution in the tubes is crucial to prevent excessive thermal stress that may lead to failure. Through design optimization and simulations, improvements in reducing tube wall temperature and compressive stress have been achieved for enhanced performance of the heat exchanger.
Article
Engineering, Chemical
Bing Cai, Weizhong Deng, Tong Wu, Tingting Wang, Zhengyuan Ma, Wei Liu, Lei Ma, Zhichun Liu
Summary: This study explores the influence of using a pouring silicate wick on the production and performance of loop heat pipes. The results show that the system can operate stably, adapt well to changes in heat load, and have good heat load matching capabilities.
Article
Mathematics
Fatih Selimefendigil, Mondher Hamzaoui, Abdelkarim Aydi, Badr M. M. Alshammari, Lioua Kolsi
Summary: In this study, the convective cooling of double rotating cylinders in a porous medium is analyzed using hybrid nano-jets. The effects of Reynolds number, rotational speed, permeability of the medium, and distance between the cylinders on the cooling performance are numerically assessed. The results indicate that increasing the rotational speed, permeability, and Reynolds number improves the cooling performance, and higher thermal performances are achieved with higher nanoparticle loading in the hybrid nanofluid. An optimization algorithm is used to find the optimum distance and rotational speeds for improved cooling performance.
Article
Thermodynamics
B. J. Gireesha, G. Sowmya, Madhu Macha
Summary: This paper studies the temperature performance of a porous fin in fully wet condition, considering the effects of natural convection and radiation. The finite element method is used to solve the non-dimensional ordinary differential equation, which includes highly nonlinear terms. The parameters affecting heat transfer of the fin are analyzed by plotting graphs.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2022)
Article
Thermodynamics
Mohamed Omri, Fatih Selimefendigil, Hichem T. Smaoui, Lioua Kolsi
Summary: A novel cooling channel system with multiple porous deflectors and nanofluids is proposed for thermal management of photovoltaic panels. Numerical assessments show that the combination of porous deflectors and nanofluids can significantly improve the cooling performance.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Xinjian Deng, Enying Li, Hu Wang
Summary: For the multi-objective design of heat sinks, a variable-fidelity evolutionary method (VFMEM) was suggested to improve the efficiency of evolutionary algorithms. Compared with other algorithms, VFMEM solves a high-fidelity model using a low-fidelity model and has the distinctive characteristic of application in multi-objective optimization.
Article
Engineering, Aerospace
Khurrum Mahmood, Norilmi Amilia Ismail
Summary: This study optimizes the aerostat by simultaneously optimizing the hull fineness ratio, fin area, and fin position, resulting in a reduction in size and mass without compromising the blow-by limits.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
George Oguntala, Gbeminiyi Sobamowo, Yim-Fun Hu
Summary: This paper presents a non-Fourier bioheat transfer prediction methodology for human skin, developing a dual-phase lag bioheat transfer model to determine skin burn injury. The study demonstrates that parameters such as initial tissue temperature and thermal conductivity are critical in examining the skin burn injury threshold.
FIRE AND MATERIALS
(2022)
Article
Chemistry, Analytical
Falih M. Alnahwi, Yasir I. A. Al-Yasir, Chan Hwang See, Raed A. Abd-Alhameed
Summary: In this paper, a single-element and MIMO microstrip antenna with two pairs of unequal slits is proposed as a circularly polarized antenna for 5G mid-band handsets with negligible back radiation. The proposed antenna utilizes engraving unequal pairs of slits on the patch to ensure circular polarization. Proximity-coupled feeding technique is utilized to provide a larger antenna bandwidth. A novel analysis technique is proposed to generate circular polarization in the broadside direction without affecting the ground plane structure. The proposed antenna also features reduced mutual coupling to make it compatible with 5G mid-band handsets.
Article
Computer Science, Information Systems
Yanal S. Faouri, Sarosh Ahmad, Naser Ojaroudi Parchin, Chan Hwang See, Raed Abd-Alhameed
Summary: This article reports on a small printed bowtie-shaped microstrip antenna for various 5G wireless applications. The antenna has multiband characteristics and optimized rejection bands, making it suitable for wireless fidelity, sub-6 GHz, and ultra-wideband 5G communications. The meandering microstrip lines connected to both sides of the antenna enhance rejection and operating bands.
Article
Computer Science, Information Systems
Mehr E. Munir, Abdullah G. Al Harbi, Saad Hassan Kiani, Mohamed Marey, Naser Ojaroudi Parchin, Jehanzeb Khan, Hala Mostafa, Javed Iqbal, Muhammad Abbas Khan, Chan Hwang See, Raed A. Abd-Alhameed
Summary: This paper presents a planar multi-circular loop antenna with a wide impedance bandwidth for next generation mm-wave systems. The proposed antenna design achieves a resonance response from 26.5 to 41 GHz, with a peak gain of 4 dBi and radiation efficiency of 96%. By transforming the multi-circular ring antenna element into a four-element array system, a peak gain of 11 dBi is achieved. The simulated and measured results demonstrate the suitability of the proposed antenna for mm-wave communication systems.
Article
Computer Science, Information Systems
Redouane Jouali, Mohssin Aoutoul, Hassan Ouahmane, Sarosh Ahmad, Anas Had, Fadwa El Moukhtafi, Naser Ojaroudi Parchin, Chan Hwang See, Raed Abd-Alhameed
Summary: This paper presents a new analog design for a long-read range RFID tag antenna aimed at localization applications. The design focuses on characterizing the antenna impedance through the study of capacitive effects created by gaps and the introduction of open circuited L-shaped stubs. The results show that the proposed antenna design significantly improves performance through the introduction of gaps and stub structures with optimized dimensions. The proposed antenna operates in two frequency bands and is mainly composed of three split rectangular resonators.
Article
Computer Science, Information Systems
Zain-Aldeen S. A. Rahman, Basil H. Jasim, Yasir I. A. Al-Yasir, Raed A. Abd-Alhameed
Summary: In comparison with integer-order chaotic systems, fractional-order chaotic systems exhibit more complex dynamics. This paper proposes a new four-dimensional fractional-order memcapacitive hyperchaotic system based on the development of a fractional-order memcapacitor. The nonlinear dynamic properties of the hyperchaotic system are explored through various methods, and an encryption cryptosystem algorithm based on the chaotic behavior of the memcapacitive model is used for image encryption to demonstrate the security level of the proposed approach.
Article
Computer Science, Information Systems
Falih M. M. Alnahwi, Yasir I. A. Al-Yasir, Nazar T. T. Ali, Ibrahim Gharbia, Abdulkareem S. S. Abdullah, Yim Fun Hu, Raed A. A. Abd-Alhameed
Summary: This study presents a compact broadband wide-slot antenna with broadband left-hand circular polarization compatible with both LTE 42 and LTE 43 standards of 5G mid-band applications. The proposed antenna is fabricated on an FR4 dielectric substrate with overall dimensions of 0.41 lambda(o) x 0.36 lambda(o) x 0.02 lambda(o), where lambda(o) is the free space wavelength at the resonant frequency of the antenna. The antenna ground plane is etched to form a square radiating slot with a pair of rectangular ground stubs that are diagonally placed inside the slot. On the other side of the antenna, the feed line is loaded by horizontal and vertical stubs to improve the coupling between the feed line and the square slot. To generate a circular polarization, the feeding stubs cooperate with the pair of rectangular ground stubs to excite the radiating slot of the antenna at two different feeding points whose currents have approximately equal amplitude and 90° phase shift. The measured impedance bandwidth (BW) of the proposed wide-slot antenna is 16.2% (580 MHz along the band 3.3-3.88 GHz), while the observed axial ratio bandwidth (ARBW) is 12.2% (440 MHz in the 3.4-3.84 GHz band). The measured gain values are found to be larger than 2.5 dB along both standards of the 5G mid-band applications.
Review
Computer Science, Information Systems
Mariam Q. Q. Abdalrazak, Asmaa H. H. Majeed, Raed A. A. Abd-Alhameed
Summary: The quality of the received signal is negatively affected by the beam squint phenomenon, especially in the millimeter wave (mmwave) bands. Many studies have been conducted to address the challenges associated with analyzing this phenomenon. Squint causes issues such as reduced gain, line of sight, angle of arrival, usable bandwidth, and fading effect, limiting the advantages of using mmwave in wireless communication systems. This article aims to provide a comprehensive overview of the relevant literature and compare various methods to identify fruitful lines of inquiry for future research.
Article
Engineering, Electrical & Electronic
Mohammad Ahmad Salamin, Asmaa Zugari, Mohammad Alibakhshikenari, Chan Hwang See, Raed Abd-Alhameed, Ernesto Limiti
Summary: This paper presents a compact 4-element multiple-input multiple-output (MIMO) antenna system for sub-6 GHz applications. Each antenna element in the MIMO system is formed using a modified M-shaped strip. To improve performance, a rectangular-shaped area is etched on the opposite side of each element in the ground plane. The antenna size is 100 x 60 mm2. Port isolation is improved by rotating the etched areas and the corresponding radiating elements, resulting in a highly isolated MIMO antenna with a small footprint. The theory of characteristic modes (TCM) is used to analyze the behavior of rotating the etched areas in the ground of the antenna. The antenna provides significant port isolation above 20 dB, stable radiation patterns, and an outstanding ECC less than 0.01. The design is simple and compact, making it suitable for MIMO operation in handheld devices.
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2023)
Editorial Material
Computer Science, Information Systems
Naser Ojaroudi Parchin, Mohammad Ojaroudi, Raed A. Abd-Alhameed
Article
Engineering, Electrical & Electronic
Merih Palandoken, Cem Gocen, Taimoor Khan, Zahriladha Zakaria, Issa Elfergani, Chemseddine Zebiri, Jonathan Rodriguez, Raed A. Abd-Alhameed
Summary: In this article, a 2.45-GHz band microwave sensor (MWS) is introduced for determining the dielectric constant of ethanol-water solutions. The MWS consists of two directly coupled split-ring resonators with a circular ring-shaped detection area for the solution. The prototype of the MWS is fabricated on a Rogers RO4003 substrate with a total size of 12 x 30 mm. The MWS shows good performance in both numerical evaluation and experimental validation, offering the feasibility of identifying complex dielectric parameters and ethanol content concentration.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Seyf El Islem Daira, Mohamed Lashab, Hemza A. Berkani, Mounir Belattar, Ibrahim Gharbia, Raed A. Abd-Alhameed
Summary: This paper presents a novel design of a curved single-layered frequency selective surface for gain enhancement of antennas. The design, fabricated on an FR-4 dielectric substrate, achieves a very broad bandwidth and demonstrates significant gain improvement. Simulation results show that the proposed design can be applied in UWB and GPR applications.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2023)
Article
Computer Science, Information Systems
Raed A. Abd-Alhameed, Yim Fun Hu, Yasir Al-Yasir, Naser Ojaroudi Parchin, Atta Ullah
Summary: The paper focuses on the impact of antenna array gain on frequency response of beam squint effect, studying the performance of various uniform linear array and uniform planar array designs under different configurations.
Article
Computer Science, Information Systems
Falih M. Alnahwi, Abdulghafor A. Abdulhameed, Nazar T. Ali, Yasir I. A. Al-Yasir, Zdenek Kubik, Abdulkareem S. Abdullah, Raed A. Abd-Alhameed
Summary: This study presents a compact reconfigurable communication filtering antenna for interweave Cognitive Radio systems, which combines a cup-shaped monopole antenna and an E-shaped Multi-Mode Resonator. The antenna operates in the WiMAX band and can adjust its resonant frequencies and data rates. The proposed antenna has the ability to communicate in the absence of primary users, and its gain values are acceptable for portable CR gadgets.
Correction
Thermodynamics
George Oguntala, Gbeminiyi Sobamowo, Raed Abd-Alhameed
THERMAL SCIENCE AND ENGINEERING PROGRESS
(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)