Article
Materials Science, Multidisciplinary
Qingqing Zhang, Wei Zhu, Jingjing Feng, Jie Zhou, Yuan Deng
Summary: The novel macro-thermophysical properties exhibited by artificially designed structures have led to the wide use of thermal metamaterials in energy harvesting and management. Micro-scale thermal functional units with different orientation angles were found to exhibit neoteric performances of thermal concentrating and shielding, showing better heat flux regulation capability and thermal concentration efficiency. The effect of air convection on the performance of these meta-materials was also evaluated, providing an effective strategy for small-scale thermal energy harvesting and protection.
MATERIALS & DESIGN
(2021)
Article
Thermodynamics
Juan C. Alvarez Hostos, Bruno Storti, Nicolas Lefevre, Vincent Sobotka, Steven Le Corre, Victor D. Fachinotti
Summary: In this work, a design method for thermal metadevices is introduced, which utilizes density-based topology optimization to manipulate conductive heat flux in a transient regime. The method involves solving an optimization problem to achieve simple devices of feasible manufacture made of isotropic materials with highly contrasting thermal properties. The proposed approach, implemented using the finite element method, allows for the design and experimental evaluation of metadevices capable of effectively manipulating heat flux.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Multidisciplinary
Jun Guo, Guoqiang Xu, Di Tian, Zhiguo Qu, Cheng-Wei Qiu
Summary: This article reports a method for creating passive ultra-conductive heat transport using natural materials. By regulating the local thermal resistance through vertical thermal transport channels, the experimental results demonstrate high heat conductivity without the need for additional energy input. These findings have significant potential in the field of thermal management.
ADVANCED MATERIALS
(2022)
Article
Thermodynamics
Bo Zhang, Lu Lu, Jinlin Song, Zixue Luo, Qiang Cheng
Summary: This study theoretically investigates the active control of near-field radiative heat transfer between two multilayered metamaterials consisting of two types of magneto-optical materials, graphene and InSb. The study found that active control of the heat transfer can be achieved by applying an external magnetic field and adjusting the chemical potential of graphene. The results show that the heat flux can be significantly enhanced by changing the magnetic field and the chemical potential of graphene, demonstrating the potential for active control of near-field radiative heat transfer.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Nanoscience & Nanotechnology
Ying Li, Wei Li, Tiancheng Han, Xu Zheng, Jiaxin Li, Baowen Li, Shanhui Fan, Cheng-Wei Qiu
Summary: This review provides a unified perspective on heat transfer control, summarizing complementary paradigms towards the manipulation of physical parameters at different length scales. Thermal conduction and radiation are emphasized in the first two parts, while the third part discusses efforts to actively introduce heat sources or tune material parameters with multiphysical effects.
NATURE REVIEWS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zifu Xu, Longqiu Li, Xiaocong Chang, Yu Zhao, Wuyi Wang
Summary: Conventional methods for manipulating heat flow are limited by a balance between tunable capability and thermal conductivity, while a novel approach using reconfigurable thermal metamaterial is proposed to enhance the responsiveness and efficiency of thermal fields. Precise and reconfigurable thermal coding/decoding information transmission is demonstrated with multiple thermal particles regulating units.
APPLIED MATERIALS TODAY
(2021)
Article
Materials Science, Multidisciplinary
Yujin Park, Kenneth J. Loh
Summary: This work proposes an alternative approach to achieve surface morphing using bio-inspired active skins, which exhibit 2D to 3D deformations when subjected to uniaxial strains. By optimizing the geometry and introducing geometric imperfections, controlled surface morphing can be achieved without relying on composites and heterogeneous materials.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yujin Park, Kenneth J. Loh
Summary: This work proposes an alternative approach for morphable structures based on bio-inspired active skins. By utilizing the localized compression generated from a re-entrant auxetic geometry, surface morphing can be induced without the need for composites and materials. Geometrical imperfections were introduced to achieve controlled surface morphing.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Construction & Building Technology
Fazia Ali-Toudert
Summary: This extensive study utilized the TEB model to explore the relationships between urban thermal environment and countryside, as well as the urban energy balance. It was found that urban canyon geometry and building construction have significant effects on urban air temperatures and energy balances, with different building types leading to varying heat effects and warming patterns.
BUILDING AND ENVIRONMENT
(2021)
Article
Physics, Applied
Yishu Su, Ying Li, Minghong Qi, Sebastien Guenneau, Huagen Li, Jian Xiong
Summary: Asymmetric heat-transfer systems, such as thermal diodes or thermal rectifiers, have gained attention for their wide range of applications. Previous approaches either relied on nonlinear thermal conductivities or required active modulation, but this study presents a straightforward strategy using linear conductive materials for passive asymmetric heat transfer. It also corrects the misconception that thermal rectification is impossible with separable nonlinear thermal conductivity, demonstrating the potential for efficient and versatile heat conduction.
PHYSICAL REVIEW APPLIED
(2023)
Article
Thermodynamics
Ismael Sanchez-Calderon, Beatriz Merillas, Victoria Bernardo, Miguel Angel Rodriguez-Perez
Summary: Developing advanced, highly insulating materials for reducing heat losses in buildings is crucial. A new methodology for measuring the thermal conductivity of small prototypes of thermal insulating materials has been developed and validated in this study. The results demonstrate the accuracy of the self-developed method in determining the thermal conductivity of samples with small dimensions using a steady-state condition.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Huagen Li, Kaipeng Liu, Tianfeng Liu, Run Hu
Summary: Researchers have proposed and realized a homogeneous zero-index thermal metadevice based on temperature modulation, which achieves stable camouflage and super-expansion effects without the energy consumption and inhomogeneity of high-speed rotation. The results of theoretical simulations and experiments confirm a uniform infinite effective thermal conductivity (IETC) and the corresponding thermal functionalities beyond cloaking.
Article
Thermodynamics
Wei Peng, Omid Karimi Sadaghiani
Summary: The distribution of heat flux around the receiver tube of parabolic trough collectors has a crucial effect on outlet temperature and thermal efficiency. This research investigates changes in both the internal and external geometry of the receiving tube for the first time, which aims to increase contact surface with the internal working fluid.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Hongying He, Weixiang Peng, Hortense Le Ferrand
Summary: This study develops a modular design principle to create bulk thermal metamaterials for thermal rectification at the macroscale. By tuning the microstructural design, the thermal metamaterials can break the symmetry of heat transfer and exhibit either convergent or divergent thermal states. These materials show promise for improved thermal management.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jinxiang Li, Kevin F. MacDonald, Nikolay Zheludev
Summary: Nanomechanical photonic metamaterials exhibit thermal motion-induced fluctuations in optical properties, which can be controlled by light to tune metamaterial transmission. This tuning mechanism provides active control for photonic devices and serves as the basis for various types of sensors.
Article
Physics, Applied
Fatih M. Canbazoglu, Krishna P. Vemuri, Prabhakar R. Bandaru
APPLIED PHYSICS LETTERS
(2015)
Article
Nanoscience & Nanotechnology
P. R. Bandaru, K. P. Vemuri, F. M. Canbazoglu, R. S. Kapadia
Article
Multidisciplinary Sciences
Krishna P. Vemuri, Prabhakar R. Bandaru
SCIENTIFIC REPORTS
(2016)
Article
Nanoscience & Nanotechnology
F. M. Canbazoglu, B. Fan, A. Kargar, K. Vemuri, P. R. Bandaru
Article
Physics, Applied
K. P. Vemuri, F. M. Canbazoglu, P. R. Bandaru
APPLIED PHYSICS LETTERS
(2014)
Article
Physics, Applied
Tianzhi Yang, Krishna P. Vemuri, Prabhakar R. Bandaru
APPLIED PHYSICS LETTERS
(2014)
Article
Physics, Applied
Krishna P. Vemuri, Prabhakar R. Bandaru
APPLIED PHYSICS LETTERS
(2014)
Proceedings Paper
Materials Science, Multidisciplinary
Krishna P. Vemuri, Fatih M. Canbazoglu, Prabhakar R. Bandaru
METAMATERIALS: FUNDAMENTALS AND APPLICATIONS 2014
(2014)