Article
Engineering, Multidisciplinary
A. Feher, R. Kovacs
Summary: The heat pulse experiment is a well-known method for measuring thermal diffusivity, but the thermal behavior of heterogeneous materials may deviate from the classical Fourier equation, requiring additional thermal parameters. The Guyer-Krumhansl equation has been successfully tested on such materials, but the evaluations often involve computationally intensive fitting procedures. A new evaluation technique has been developed to estimate all necessary thermal parameters using measured temperature history.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2021)
Review
Chemistry, Physical
Mihai Oane, Muhammad Arif Mahmood, Andrei C. Popescu
Summary: Heat equations estimate thermal distribution and phase transformation in real-time based on operating conditions and material properties, with Fourier and non-Fourier heat equations being applicable to equilibrium and non-equilibrium thermodynamical processes. Integral transform technique is a powerful method transforming partial differential equations into ordinary differential equations.
Article
Thermodynamics
Paolo Maria Mariano, Julia Polikarpus, Marco Spadini
Summary: We compare traveling-wave-type solutions between two models describing heat transfer, one including nonlinearities due to microstructural contributions and heat-flux-driven phase transition, and the other being the Maxwell-Cattaneo's scheme. Our closed-form results based on asymptotic-type analysis reveal how microstructural effects perturb the evolution of temperature traveling waves. Furthermore, our findings indicate a hidden link between initial conditions of heat flux and temperature, even in the Maxwell-Cattaneo's scheme.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
A. . J. A. . Ramos, L. G. R. Miranda, M. M. Freitas, R. Kovacs
Summary: In this paper, the authors revisit the Guyer-Krumhansl heat equation and show that by satisfying thermodynamic conditions and the maximum principle, the occurrence of negative temperatures can be avoided. The study further emphasizes the thermodynamic origin of heat equations and their compatibility with the second law, and explores two different approaches to determine the initial state in a thermodynamically compatible way. Computational simulations provide support for the findings.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Multidisciplinary
Zhuoxin Wen, Chi Hou, Meiying Zhao, Xiaopeng Wan
Summary: In this paper, the authors investigate the transient temperature response of a cracked plate under thermal shock using a non-Fourier heat transfer theory. They develop a peridynamic model that considers the non-Fourier effect, the orthotropy of thermal conductivity, and the crack thermal resistance. The model avoids spatial derivatives and is efficient for analyzing problems with discontinuities.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Thermodynamics
M. Hadi Ghasemi, S. Hoseinzadeh, S. Memon
Summary: This study presents an analytic solution for the dual-phase-lag heat conduction in a functional graded cylindrical material. The results show that the dual-phase-lag model reaches steady temperature faster than the single-phase-lag model. The temperature stability in functional graded materials is influenced by the heterogeneity coefficient. The study provides a straightforward multivariate analytical solution for the non-Fourier conduction equation in a finite cylinder with functional graded materials and any boundary conditions.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Materials Science, Ceramics
S. L. Guo, Y. X. Zhang, K. F. Wang, B. L. Wang, C. W. Zhang
Summary: This study examines the thermoelastic fields of semi-infinite ceramics subjected to surface heating shock using the non-Fourier C-V model, with the introduction of a family of exponential functions to simulate the heating process. It is found that the significant time range and spatial scale of the non-Fourier effect have been determined, and the thermal stress increases and converges along depth. The domain where the maximum thermal stresses influenced by non-Fourier heat conduction are influenced is also identified in the plane of dimensionless heating duration vs thermoelastic wave speed.
CERAMICS INTERNATIONAL
(2021)
Review
Chemistry, Physical
M. K. Muhamad Azim, A. Arifutzzaman, R. Saidur, M. U. Khandaker, D. A. Bradley
Summary: Hybrid nanomaterials, a combination of multiple nanoparticles, hold great potential for energy storage and heat transfer applications. They can be easily tailored by modifying their composition and morphology. Hybrid nanofluids, dispersing hybrid nanomaterials in base fluids, offer a superior heat transfer enhancement for advanced heat transfer devices. Meanwhile, hybrid nanomaterials exhibit outstanding electrochemical performance in energy storage devices, contributing significantly to specific capacitance and enabling the design of advanced electrodes. This article provides a review of recent advancements in hybrid nanomaterials, covering general overviews, synthesis routes, practical applications as electrodes and heat transfer fluids, as well as addressing challenging issues for future research.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Mathematics
R. S. Varun Kumar, M. D. Alsulami, I. E. Sarris, B. C. Prasannakumara, Saurabh Rana
Summary: This article focuses on the transient thermal dispersal within a moving plate using the non-Fourier heat flux model. An innovative artificial neural network strategy with the Levenberg-Marquardt backpropagation scheme is proposed for determining the transient temperature. The energy model is simplified into a non-dimensional form, and the partial differential equation is numerically solved using the finite difference method.
Article
Engineering, Chemical
Piran Goudarzi, Awatef Abidi, Seyed Abdollah Mansouri Mehryan, Mohammad Ghalambaz, Mikhail A. Sheremet
Summary: In this work, the relaxation parameter (tau) and fractionality order (alpha) in the FSPL non-Fourier heat conduction model were estimated using the CGIM method. The results demonstrated the efficiency of CGIM in estimating the unknown parameters in the FSPL model, showing excellent compatibility with the theoretical model.
Article
Chemistry, Physical
A. Trukhanov, K. A. Darwish, M. M. Salem, O. M. Hemeda, M. I. Abdel Ati, M. A. Darwish, E. Y. Kaniukov, S. Podgornaya, V. A. Turchenko, D. Tishkevich, T. Zubar, K. A. Astapovich, V. G. Kostishyn, S. Trukhanov
Summary: This study investigates the correlation between heat treatment conditions, crystal structure parameters, microstructure, and magnetic properties evolution in nanosized BaFe12O19 M-type hexaferrites. The results show that the annealing temperature has a significant impact on the microstructure parameters and non-linear changes in magnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Mechanics
Hai Qian, Yuexiang Qiu, Chunhua Lu, Xin Sha
Summary: An exact analytical method based on thermoelasticity theory is proposed to predict the temperature, stresses and displacements of simply supported laminated beams under non-uniform temperature boundary conditions. The method utilizes Fourier series expansion and state space method to derive the relationships between temperature, heat flux, displacements and stresses, with excellent convergence performance observed in numerical results. The accuracy of the approach is verified by comparison with results from the finite element method, with detailed discussions on the influences of surface temperature, material properties, length-to-thickness ratio, and layer numbers on temperature, displacements and stresses distributions.
COMPOSITE STRUCTURES
(2022)
Review
Chemistry, Multidisciplinary
Shizhong Zhang, Sumeet Malik, Nisar Ali, Adnan Khan, Mohammad Bilal, Kashif Rasool
Summary: Nanotechnology is a rapidly developing discipline that has reshaped the world by providing diverse prospects. Nanomaterials, with their small size and large surface area, have become appealing and widely utilized in various fields.
TOPICS IN CURRENT CHEMISTRY
(2022)
Article
Engineering, Multidisciplinary
Cibele Cornejo Jacinto, Antonio Tadeu, Luiz Alkimin de Lacerda
Summary: This paper presents a new approach to analyze the transient heat diffusion resulting from conduction in a two-dimensional domain with confined heterogeneous subdomains. By coupling the boundary element method with other methods, the proposed formulation allows overcoming the limitations of each method. The time domain responses are obtained using inverse fast Fourier transform, and the results are compared with reference solutions to validate the algorithm's effectiveness.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Thermodynamics
M. Nawaz, M. Adil Sadiq
Summary: The study focuses on coupling non-Newtonian constitutive equations and hybrid particle models with conservation laws, deriving the energy equation under non-Fourier heat flux condition. Numerical solutions are obtained using the finite element method, ensuring mesh-free and convergent results that can be visualized. The results show variations in wall shear stress and heat transfer rate under different fluid and flow conditions.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Engineering, Chemical
Tong Liu, Moran Wang
Summary: Digital rock analysis provides a powerful tool for predicting geophysical properties and studying fluid and interfacial transport mechanisms in rocks, but there is a struggle to balance scanning resolution and sample size due to imaging technology limitations. The critical size of REV for multiphase flow in porous media is found beyond twice that for single-phase flow in this study, indicating the influence of phase interaction and wettability on relative permeability-saturation curve in multiphase flow.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Mathematics, Interdisciplinary Applications
Fanli Liu, Moran Wang
Summary: This study evaluates the applicability of the macroscopic approach for the displacing process of droplets in micropores, identifying three size effects affecting the displacement results: Laplace pressure, low interfacial density, and breakdown of macroscopic description. The influence of system scale and fluid type on these size effects are further investigated, indicating that traditional macroscopic approach may be invalid even when continuum assumption still holds due to other size effects.
JOURNAL OF MULTISCALE MODELLING
(2022)
Article
Engineering, Mechanical
Fanli Liu, Moran Wang
Summary: The study found that for fixed wettability, the critical pressure for mobilizing trapped ganglia usually peaks at neutrally wet conditions, and the movement of ganglia during the displacement process favors water-wet conditions. Moreover, altering wettability from oil-wet to water-wet requires a dynamic process with heterogeneous wetting states and the ability for ganglia to merge within a time window for further displacement.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Thermodynamics
Yangyu Guo, Moran Wang
Summary: In this work, a lattice Boltzmann scheme was developed to numerically solve the phonon Boltzmann equation, modeling the transition of heat transport from diffusive regime to hydrodynamic regime and successfully capturing phonon hydrodynamic phenomena.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Energy & Fuels
Weiwei Zhu, Xupeng He, Yiteng Li, Gang Lei, Ryan Santoso, Moran Wang
Summary: This study uses a stochastic discrete fracture network method to simulate fractures in subsurface formations and conducts a sensitivity analysis. The results show that critically stressed fractures form the backbone of the stimulated reservoir volume (SRV), while partially open fractures can significantly enlarge the size of SRV. Fracture roughness is the most influential factor for the total length of critically stressed fractures, and the probability of open fractures is the most significant factor for the relative increase of SRV.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Weiwei Zhu, Xupeng He, Gang Lei, Moran Wang
Summary: The systematic analysis of the complexity of fracture systems, especially in three-dimensional (3D) fracture networks, is currently insufficient. In this study, various fracture networks with different geometries were generated using a stochastic discrete fracture network method, and their complexity was quantified using fractal dimension and singularity variation in a multifractal spectrum. The influential factors of complexity, such as geometrical fracture properties and system size, were systematically investigated. The results show that different parameters have varying degrees of significance on the complexity at different stages of fracture network development.
JOURNAL OF STRUCTURAL GEOLOGY
(2022)
Article
Energy & Fuels
Yue Wang, Zhiguo Tian, Steffen Nolte, Bernhard M. Krooss, Moran Wang
Summary: This contribution presents an improved straight-line method that allows simultaneous determination of permeability and porosity in a single pulse-decay measurement. Analytical expressions are derived to give the value of the dimensionless equilibrium pressure, reducing errors caused by mistaking early-time data for late-time one.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Wenhai Lei, Xukang Lu, Moran Wang
Summary: Micro/nanoparticle suspensions can adjust multiphase displacement in porous media, which has wide applications in various scientific and industrial contexts. Direct observation of suspension flow dynamics and corresponding multiphase patterns is challenging due to the opaque realistic porous media. However, microfluidic experiments provide alternative methods to observe suspension influence on interface and multiphase flow behaviors at high resolutions, improving understanding and optimization of displacement mechanisms.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2023)
Article
Computer Science, Interdisciplinary Applications
Weiwei Zhu, Xupeng He, Ryan Kurniawan Santoso, Gang Lei, Tadeusz W. Patzek, Moran Wang
Summary: This study digitized 80 published outcrop maps using a pixel-based fracture detection algorithm and analyzed key fracture properties. The findings provide theoretical justifications for fracture network modeling and reveal multiple power-law distributions for fracture lengths, variations in fracture orientations across scales, and spatial clustering of fracture intensities. The study also emphasizes the presence of T-type nodes in natural fracture networks, which require rule-based algorithms for simulation.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Thermodynamics
Xin Ran, Yunfan Huang, Moran Wang
Summary: This paper proposes a hybrid Monte Carlo-discrete ordinates method (MC-DOM) for predicting phonon transport in mesoscopic systems with complex interfaces. The method combines the computational efficiency of DOM in the bulk region with the flexibility of MC near complex interfaces. It has been shown that the hybrid method runs faster than the pure particle method and is applicable for high-precision temperature calculation. The method enriches numerical tools for mesoscopic phonon transport simulation and contributes to the understanding and optimization of heat transport in micro/nanosystems with complex geometries.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Wuli Miao, Moran Wang
Summary: This study investigates thermal transport in metal/semiconductor multilayer films using the coupled electron and phonon Boltzmann transport equations combined with the phonon diffuse mismatch model. The importance of electron-phonon coupling transport and the critical thickness of the metal layer for considering this transport are demonstrated. The research findings provide insight into the manipulation of thermal conductivity in multilayers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Mechanical
Amer Alizadeh, Yunfan Huang, Fanli Liu, Hirofumi Daiguji, Moran Wang
Summary: Surface charging plays a crucial role in the stability of immiscible liquid-liquid interfaces, surfactant adsorption, drug delivery, and mineral flotation. This study presents an alternative experimental method using a streaming potential setup. A Y-Y shaped microchannel with a polymer-coated inner wall was employed to establish a flat and stable liquid-liquid interface. The method was successfully verified by investigating the charging of aqueous solution-silicon surface. The proposed method offers simplicity and flexibility for studying liquid-liquid interface charging mechanisms and inspiring quantitative macroscopic interfacial modeling.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
Wenhai Lei, Xukang Lu, Tianjiang Wu, Haien Yang, Moran Wang
Summary: In this study, microgel-in-oil suspension was synthesized and found to improve the displacement efficiency of multiphase flow in heterogeneous porous media. The optimal efficiency was achieved with a moderate content of microgel-in-oil, which demonstrated strong sweeping and carrying abilities. Synergistic transport of microgel-in-oil and plain microgel particles was observed to divert displacing fluid and alter the flow behavior. These findings provide insights into the self-adaptive transport behavior of microgel-in-oil and its potential application in enhancing multiphase displacement efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Physics, Applied
Lina Yang, Quan Zhang, Gengkai Hu, Nuo Yang
Summary: The main challenge of flexible electronics/materials is to maintain thermal conductance under large deformation. This work investigates the thermal conductance of a nano-designed Si metamaterial constructed with curved nanobeams by molecular dynamics simulation. The results show that the thermal conductance of the nano-designed Si metamaterial is insensitive under a large deformation (strain similar to-41%). This work provides valuable insights on multifunction, such as both stable thermal and mechanical properties, of nano-designed metamaterials.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Zhicheng Zong, Shichen Deng, Yangjun Qin, Xiao Wan, Jiahong Zhan, Dengke Ma, Nuo Yang
Summary: By modifying the Si surface with hydroxyl groups, the interfacial thermal conductance (ITC) of the Si/PVDF interface can be significantly enhanced by up to 698%, owing to the strengthening of atomic couplings.
