Local thermal non-equilibrium approach on entropy and thermal features of buoyancy-driven flow of nano-encapsulated PCMs suspension: role of geometrical parameters
作者：S. A. Ohid, M.K. Nayak, Rifaqat Ali, Ahmed M. Galal · 发表于：International Journal of Numerical Methods for Heat & Fluid Flow · 年份：2025 · DOI：10.1108/hff-01-2025-0006 · 被引用次数：12 · 研究领域：Nanofluid Flow and Heat Transfer、Phase Change Materials Research、Heat Transfer and Optimization
Purpose Nano-encapsulated phase change materials (NEPCMs) are favourable in terms of their potentials to ameliorate the efficiency of working liquids, keeping the apparatus at a determined cooling temperature. NEPCMs are used in thermal management of buildings, air-conditioning systems and electronic cooling devices. Because of notable temperature disparity among two components (solid as well as nanofluid) in linear/non-linear porous material, an interface model such as local thermal non-equilibrium (LTNE) is highly applicable in electronic equipment, geothermal engineering and high-conductivity foams. Forchheimer-Brinkman-extended Darcy model (FBEDM) featured with fluid flow at higher velocities in high porosity porous medium is significantly found in solar thermal systems, heat exchangers and condensation and boiling operations. In view of above real-world applications of NEPCMs, LTNE and FBEDM, the aim of this work is to scrutinize the effect of LTNE on hydrothermal features of buoyancy-driven flow of NEPCMs suspension in an inclined square chamber subject to FBEDM. The introduction of the mechanism of horizontal displacement and vertical displacement (VD) of channels subject to inclined domain, FBEDM and LTNE is the novelty of this work. Design/methodology/approach The equations govern this problem are solved via finite element method and irreversibility in the two components (nanofluid and solid) of the porous structure is also explored. Findings The important findings o...