Experimental and numerical analysis of convective flow in a square cavity with internal protuberances

8th International Congress of Engineering Physics

物理学;工业技术

Lizardi, A.^1 ; Terres, H.^1 ; López, R.^1 ; Vaca, M.^1 ; Chávez, S.^1 ; Lara, A.^1 ; Morales, J.R.^1

Universidad Autónoma Metropolitana-Azcapotzalco, Departamento de Energía, Área de Termofluidos, Av. San Pablo 180, Col. Reynosa Tamaulipas, Del. Azcapotzalco, Ciudad, Mexico^1

关键词: Electrical resistances;    Experimental and numerical analysis;    Flow development;    High temperature;    Horizontal velocity;    Natural convection flow;    Numerical results;    Vertical velocity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/792/1/012022/pdf
DOI  :  10.1088/1742-6596/792/1/012022

学科分类：工业工程学

来源: IOP

【 摘 要 】

A comparison between experimental and numerical results for natural convection flow generated inside a square cavity filled with water, which has internal protuberances, is presented. The cavity is formed by vertical-isothermal and horizontal-adiabatic walls. The built prototype is integrated by: a clear glass square cavity, where internal protuberances are located; a cavity with water which maintains one of its walls at low temperature; an electrical resistance which preserves another wall at high temperature; and an array of mirrors. The experimental flow development was studied with a Particle Image Velocimetry (PIV) device. Furthermore, ANSYS software was used and mass, momentum and energy equations were numerically solved. Results were compared using a system with rectangular, semi-circular, and triangular protuberances versus a system without protuberances; it was found that: a) the maximum positive value of the vertical velocity decreased 7.12, 3.33 and 3.03%, respectively, for the experimental case, and 4.52, 2.26 and 1.27%, respectively, for the numerical case; b) the maximum positive value of the horizontal velocity decreased 18.37, 11.89 and 4.59%, respectively, for the experimental case, and 6.46, 4.75 and 2.47%, respectively, for the numerical case; c) the average Nusselt number decreased 10.52, 7.95 and 6.06%, respectively, for the experimental case, and 12.01, 9.06 and 3.02%, respectively, for the numerical case.