Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale method
This paper examined how microstructure influences the homogenized thermal conductivity of cellular structures and revealed a surface-induced size-dependent effect. This effect is linked to the porous microstructural features of cellular structures, which stems from the degree of porosity and the dis...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2025-07-01
|
| Series: | Defence Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914725000418 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1839648348758343680 |
|---|---|
| author | Xiaofeng Xu Junfeng Li Xuanhao Wu Ling Ling Li Li |
| author_facet | Xiaofeng Xu Junfeng Li Xuanhao Wu Ling Ling Li Li |
| author_sort | Xiaofeng Xu |
| collection | DOAJ |
| description | This paper examined how microstructure influences the homogenized thermal conductivity of cellular structures and revealed a surface-induced size-dependent effect. This effect is linked to the porous microstructural features of cellular structures, which stems from the degree of porosity and the distribution of the pores. Unlike the phonon-driven surface effect at the nanoscale, the macro-scale surface mechanism in thermal cellular structures is found to be the microstructure-induced changes in the heat conduction path based on fully resolved 3D numerical simulations. The surface region is determined by the microstructure, characterized by the intrinsic length. With the coupling between extrinsic and intrinsic length scales under the surface mechanism, a surface-enriched multiscale method was developed to accurately capture the complex size-dependent thermal conductivity. The principle of scale separation required by classical multiscale methods is not necessary to be satisfied by the proposed multiscale method. The significant potential of the surface-enriched multiscale method was demonstrated through simulations of the effective thermal conductivity of a thin-walled metamaterial structure. The surface-enriched multiscale method offers higher accuracy compared with the classical multiscale method and superior efficiency over high-fidelity finite element methods. |
| format | Article |
| id | doaj-art-1d6a1e70ee6f4098bef5e58d3b2bb02d |
| institution | Matheson Library |
| issn | 2214-9147 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj-art-1d6a1e70ee6f4098bef5e58d3b2bb02d2025-06-29T04:52:00ZengKeAi Communications Co., Ltd.Defence Technology2214-91472025-07-01495067Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale methodXiaofeng Xu0Junfeng Li1Xuanhao Wu2Ling Ling3Li Li4State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaChangde Tobacco Machinery Co., Ltd., China Tobacco Machinery Group, Changde 415000, ChinaChangde Tobacco Machinery Co., Ltd., China Tobacco Machinery Group, Changde 415000, ChinaState Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; Corresponding author.This paper examined how microstructure influences the homogenized thermal conductivity of cellular structures and revealed a surface-induced size-dependent effect. This effect is linked to the porous microstructural features of cellular structures, which stems from the degree of porosity and the distribution of the pores. Unlike the phonon-driven surface effect at the nanoscale, the macro-scale surface mechanism in thermal cellular structures is found to be the microstructure-induced changes in the heat conduction path based on fully resolved 3D numerical simulations. The surface region is determined by the microstructure, characterized by the intrinsic length. With the coupling between extrinsic and intrinsic length scales under the surface mechanism, a surface-enriched multiscale method was developed to accurately capture the complex size-dependent thermal conductivity. The principle of scale separation required by classical multiscale methods is not necessary to be satisfied by the proposed multiscale method. The significant potential of the surface-enriched multiscale method was demonstrated through simulations of the effective thermal conductivity of a thin-walled metamaterial structure. The surface-enriched multiscale method offers higher accuracy compared with the classical multiscale method and superior efficiency over high-fidelity finite element methods.http://www.sciencedirect.com/science/article/pii/S2214914725000418Thermal conductivitySurface-enriched multiscale methodMetamaterialSurface effectMulti-scale modeling |
| spellingShingle | Xiaofeng Xu Junfeng Li Xuanhao Wu Ling Ling Li Li Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale method Defence Technology Thermal conductivity Surface-enriched multiscale method Metamaterial Surface effect Multi-scale modeling |
| title | Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale method |
| title_full | Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale method |
| title_fullStr | Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale method |
| title_full_unstemmed | Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale method |
| title_short | Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale method |
| title_sort | size dependent heat conduction of thermal cellular structures a surface enriched multiscale method |
| topic | Thermal conductivity Surface-enriched multiscale method Metamaterial Surface effect Multi-scale modeling |
| url | http://www.sciencedirect.com/science/article/pii/S2214914725000418 |
| work_keys_str_mv | AT xiaofengxu sizedependentheatconductionofthermalcellularstructuresasurfaceenrichedmultiscalemethod AT junfengli sizedependentheatconductionofthermalcellularstructuresasurfaceenrichedmultiscalemethod AT xuanhaowu sizedependentheatconductionofthermalcellularstructuresasurfaceenrichedmultiscalemethod AT lingling sizedependentheatconductionofthermalcellularstructuresasurfaceenrichedmultiscalemethod AT lili sizedependentheatconductionofthermalcellularstructuresasurfaceenrichedmultiscalemethod |