Article
Computer Science, Software Engineering
Tetsuya Takahashi, Christopher Batty
Summary: Simultaneously coupling diverse physical systems poses significant computational challenges. We propose a strong coupling approach that expresses all relevant physics in one consistent optimization problem and develop a numerical solver to tackle this difficult problem.
ACM TRANSACTIONS ON GRAPHICS
(2022)
Article
Metallurgy & Metallurgical Engineering
Ganhua Liu, Shiyi Deng, Xiaodong Huo
Summary: This article proposes a new numerical simulation method for quenching processes by introducing coupled heat exchange between the liquid quenching medium and workpiece, thereby replacing the role of the heat transfer coefficient in the simulation. The method is validated through experimental studies on 1045 steel rod quenched in water, with maximum relative errors of 3.6%, 9%, and 5.1% for hardness, cooling curve, and residual stress, respectively. The article also investigates the effect of different flow parameters of quenching media on the quenching effect, finding that quenching in water at 50℃ provides the lowest risk of cracking and the highest hardness value for 1045 steel rod. This method improves the universality and convenience of numerical simulation for the quenching process and can guide the formulation of quenching process parameters when the heat transfer coefficient is unknown.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Ganhua Liu, Shiyi Deng, Xiaodong Huo
Summary: This article proposes a new numerical simulation method for quenching processes and validates its accuracy and feasibility through experiments. The study also investigates the effect of different flow parameters of quenching media on the quenching effect.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Engineering, Geological
Fei Wang, Heinz Konietzky, Martin Herbst, Monika Kutz, Thomas Fruehwirt, Nadine Freudenberg, Heiner Siedel
Summary: The study found that during a fire, sandstone specimens mainly experience tensile stresses, with tensile microcracks beneath the surface furtherly extended and widened due to re-distributed local stresses caused by local failures. After the fire, significant tensile stresses appear in the outer part of the sample due to increased thermal gradients of the inner part, leading to crack widening on the surface.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Computer Science, Software Engineering
Chaoyang Lyu, Wei Li, Mathieu Desbrun, Xiaopei Liu
Summary: This paper proposes an efficient and versatile approach for simulating two-way fluid-solid coupling in the kinetic fluid simulation framework, addressing the challenges of reproducing the interaction between fluids and solids. The novel hybrid approach introduced in the paper ensures a robust and plausible treatment of turbulent flows near moving solids, significantly reducing boundary artifacts. Simple GPU optimizations are also presented to achieve a higher computational efficiency than existing methods.
ACM TRANSACTIONS ON GRAPHICS
(2021)
Article
Engineering, Aerospace
Renfeng Wei, Zhifeng Ye
Summary: This paper presents the design of an axial partition fuel cooling shell to address the temperature rise issue in the motor of the electric fuel pump (EFP). A simplified method in conjunction with CFD is described to analyze heat generations and fuel cooling effects in integrated EFPs. Results show that the fuel cooling shell plays a key role in heat dissipation with a maximum temperature reduction of approximately 42K, and the reliability of the simplified model and fuel cooling shell is demonstrated through experiments.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Peng Yu, Honghua Liu, Hongbo Yu, Yongjian Xie, Yang Yu, Chenghao Zhu, Jie Dong, Yong Guan
Summary: Rainfall is the main factor inducing landslides. Clarifying rainfall-induced landslides' mechanisms and establishing adequate warning and prevention measures are crucial for regional disaster prevention and sustainable development.
Article
Mechanics
Ansan Pokharel, V'yacheslav Akkerman, Ismail B. Celik, Richard L. Axelbaum, Alain Islas, Zhiwei Yang
Summary: The present study investigates a two-phase, gas-solid flow in an annular pipe at elevated pressure and moderate Reynolds number. The research shows that particle loading, interaction between phases, and turbulence dispersion significantly influence the development of flow dynamics.
Article
Engineering, Environmental
Chandra M. R. Vendra, Ashish Shelke, Jonathan E. H. Buston, Jason Gill, Daniel Howard, Elliott Read, Ahmed Abaza, Brian Cooper, Jennifer X. Wen
Summary: This study aims to develop a predictive tool for simulating fires in high energy density lithium-ion batteries during thermal runaway, in order to assess the thermal and environmental hazards of such fires and aid in the optimization of design mitigation measures.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Chemical
J. I. Corcoles, A. Acosta-Iborra, J. A. Almendros-Ibanez, C. Sobrino
Summary: This paper presents the results of a 3-D numerical simulation of a freely bubbling fluidized bed using the software Barracuda (CPFD-Barracuda). The results obtained from CPFD-Barracuda show satisfactory predictions of the global behavior of bubbling beds, but with some deviations in bubble sizes and velocities compared to experiments and more common numerical approaches. The sensitivity of bubble characteristics to the chosen particle fraction threshold value is also discussed, with CPFD-Barracuda showing less sensitivity compared to other methods.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Jiwei Tang, Weicheng Xie, Xiaoliang Wang, Cheng Chen
Summary: This study establishes a mechanical properties calculation model for near-space airship envelope materials, taking into account the effects of stress ratios, stress magnitudes, and temperatures. By using various simulation and analysis techniques, the fluid-structure-thermal coupling model of airship envelopes is developed, allowing for a more accurate prediction of stress-strain distribution and deformation characteristics.
Article
Computer Science, Interdisciplinary Applications
Fei Wang, Wei Li, Xinli Hu, Ziwei Cao, Yunfei Gao
Summary: The undrained shear test is crucial in understanding the deformation and failure mechanisms of rock and soil, but it has its limitations. This paper proposes a tailored numerical simulation approach to complement the test, and validates its effectiveness and accuracy through specific cases.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Chemistry, Multidisciplinary
Xiao Zhang, Maosheng Zheng
Summary: The aerodynamic characteristics of vertical-axis wind turbines with different numbers of blades are studied numerically in this paper. A coupling model of fluid flow and solid turbine blade is used to simulate the interactions between air and wind turbine. The pressure distribution and blade deformation affected by air are obtained and discussed.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Changhe Du, Yinfeng Gao, Hongwei Li, Wenpeng Hong, Rong Li
Summary: The study found that at high rotation numbers, the centrifugal force drives coolant downstream in the vortex chamber, causing backflow and reducing heat transfer efficiency upstream.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Nuclear Science & Technology
Xinkun Xiao, Qinghang Cai, Ronghua Chen, Wen Ding, Kailun Guo, Kui Zhang, Wenxi Tian, Suizheng Qiu, G. H. Su
Summary: This paper introduces the PANDA software, which combines the moving particle semi-implicit method (MPS) and the discrete element method (DEM). The software demonstrates good performance in simulating particle motion and fluid-solid coupling problems, especially in simulating molten pool accumulation in nuclear reactor accidents.
NUCLEAR ENGINEERING AND DESIGN
(2022)
Article
Engineering, Multidisciplinary
Fabien Salmon, Delphine Lacanette, Jean-Christophe Mindeguia, Colette Sirieix, Axel Bellivier, Jean-Claude Leblanc, Catherine Ferrier
Article
Engineering, Multidisciplinary
Felix Wiesner, Alastair Bartlett, Luke Bisby, Siyimane Mohaine, Fabienne Robert, Robert McNamee, Jean-Christophe Mindeguia
Summary: This paper presents observations, measurements, and analysis from experiments on CLT slabs exposed to fire, highlighting the importance of ventilation conditions on fire dynamics and burning duration, and the relative accuracy of a mechanics-based structural fire model in predicting structural failure.
Article
Geography, Physical
Cecile Verdet, Colette Sirieix, Antoine Marache, Joelle Riss, Jean-Christophe Portais
Article
Materials Science, Multidisciplinary
Jean-Christophe Mindeguia, Siyimane Mohaine, Luke Bisby, Fabienne Robert, Robert McNamee, Alastair Bartlett
Summary: The paper presents results from a collaborative project aimed at analyzing the behavior of combustible and non-combustible loaded structures under standard and 'natural' fires. The focus is on the thermo-mechanical behavior of cross-laminated timber (CLT) slabs, providing new experimental data and detailed analysis of their behavior during and after fire exposure.
FIRE AND MATERIALS
(2021)
Article
Construction & Building Technology
Fabien Salmon, J. -C. Mindeguia, D. Lacanette, C. Sirieix, J. -C. Leblanc, C. Ferrier
Summary: The study focuses on simulating fires in cave-like geometries to understand prehistoric fires, proposing three strategies to simulate the combustion process of a 90 kg hearth. The experiments address the challenges of replication in confined spaces and aim to provide keys for simulations of compartment fires based on experimental data.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Geochemistry & Geophysics
Cecile Verdet, Fabien Salmon, Colette Sirieix, Delphine Lacanette
Summary: The study introduces an innovative high-resolution micro-ERT method to measure water migration within a rock mass during a fire. The water migration process is successfully described in three phases: drying, migration from deeper parts towards surface, and a readjustment phase after fire extinction.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Construction & Building Technology
Bruno Fernandes, Helene Carre, Jean-Christophe Mindeguia, Celine Perlot, Christian La Borderie
Summary: The use of recycled concrete aggregates (RCA) has been proven as a good solution for sustainable concrete production, but its performance at high temperatures is critical for building structures. This paper reviews and discusses the mechanical and thermal properties of concrete made with RCA at high temperatures to identify future research needs.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Bruno Fernandes, Helene Carre, Jean-Christophe Mindeguia, Celine Perlot, Christian La Borderie
Summary: Concrete made with recycled aggregates (RCA) has specific properties and a higher risk of spalling under fire conditions compared to concrete made with natural aggregates (NA). Increasing the replacement rate of recycled coarse aggregates in concrete leads to a higher spalling degree up to a certain point, beyond which further increase in replacement rate does not result in higher spalling. The use of RCA also alters the physical properties of concrete, particularly water content, which can trigger spalling.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Anthropology
Fabien Salmon, Catherine Ferrier, Delphine Lacanette, Jean-Christophe Mindeguia, Jean-Claude Leblanc, Carole Fritz, Colette Sirieix
Summary: The unique fire phenomena discovered in the Chauvet-Pont d'Arc Cave have sparked interest among archaeologists. Through the use of numerical tools and in situ observations, it is believed that these fires were deliberately designed and placed, enabling further analysis of their functions.
JOURNAL OF ARCHAEOLOGICAL METHOD AND THEORY
(2021)
Article
Archaeology
Armance Jouteau, Valerie Feruglio, Delphine Lacanette, Samuel Carre, Nicolas Noe, Jacques Jaubert
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)
