Measurement, prediction, and analysis of effective thermal conductivity of powder beds enhanced by periodic open cellular structure

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-05 DOI:10.1016/j.powtec.2025.120883

Wei Zhou , Xiaofeng Mou , Penghui Feng , Zewei Bao

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引用次数: 0

Abstract

Powder beds are widely utilized in various industrial fields. However, the inherent properties of the particles limit their heat transfer performance. One of the most promising solutions to enhance heat transfer is the addition of periodic open cellular structure (POCS) to form packed POCS. However, the effective thermal conductivity (ETC) of packed POCS has been rarely explored. This study aims to enhance the heat transfer performance of powder beds by integrating POCS and establish a predictive framework for their ETC. In this study, the ETC of the powder beds, POCS, and packed POCS was measured. The modified Zehner–Schlünder–Damköhler (ZSD) model was adopted to predict the ETC of the powder beds. A prediction formula for ETC of packed POCS was developed based on the ZSD model. The effects of particle properties on the thermal conductivity of both powder beds and packed POCS were investigated. Results revealed that an increase in solid thermal conductivity (k_s) enhanced heat transfer within both powder beds and packed POCS. Reductions in porosity (ε) and packing density (ε_packing) enhanced heat transfer within powder beds and packed POCS, respectively. Particle diameter (D_p) had a negligible impact on ETC. POCS has the potential to significantly enhance heat transfer in the powder beds, and the incorporation of POCS into powder beds increased ETC by 2–5 times. In addition, the ETC of packed POCS was accurately predicted using the prediction formula (maximum relative error ≤ 5.7 %).

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.