Double-diffusive convection of a rotating circular cylinder in a porous cavity suspended by nano-encapsulated phase change materials

• Published in: Case studies in thermal engineering Vol. 24; p. 100864
• Main Authors: Raizah, Zehba, Aly, Abdelraheem M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2021; Elsevier
• Subjects: Double diffusive; Fusion temperature; ISPH; NEPCMs; Porous media; Rotating cylinder; ISPH; Porous media; NEPCMs; Rotating cylinder; Fusion temperature; Double diffusive
• ISSN: 2214-157X; 2214-157X
• DOI: 10.1016/j.csite.2021.100864

The main objective of this study is to simulate the suspension of a nano-encapsulated phase change material (NEPCM) during the double-diffusive convection flow inside a compound cavity. A novel cavity shape is formed from a central circular cylinder mounted with two rectangular shapes. An incompressible smoothed particle hydrodynamics (ISPH) method is used to solve the governing equations of the present physical problem. A heat capacity of the core-shell layers assisted the phase changes of the encapsulated nanoparticles. The main findings of the performed simulations showed that a fusion temperature controls both location and intensity of a phase change zone inside a cavity. Regardless of the impacts of a buoyancy ratio parameter on the flow speed, the melting-solidification zones are not changing under the variations in a buoyancy ratio parameter. An increase in a radius of a circular cylinder enhances the double diffusive convection and it reduces the intensity of a phase change zone. In addition, the increase in the radius of the circular cylinder powers the average Nusselt and Sherwood numbers. Increasing nanoparticles concentration enhances a phase change zone.