Numerical study of heat transfer and flow characteristics of air jet in a semi-confined cavity
Year: 2017
Type: conference-paper
Abstract: A numerical study of heat transfer and flow characteristics of an air jet 2D turbulent and unsteady in a semi-confined cavity is presented. The bottom wall is divided into two thermal zones while the other walls are adiabatic: the wall part of the confined zone, located between the impingement jet and the vertical wall is maintained at a temperature T f while the other wall part is a constant temperature T c > T f . T c is equals to the air jet temperature. Transfers are described by RANS and the energy equation; the turbulence model is the first order SST k-ω model (Standard and Shear-Stress Transport). Simulations have been performed with the FLUENT software. Computational are conducted for Reynolds number ranging from 10000 to 20000 based on jet width, jet to target plate distance, h/e, from 4 to 12 (h being the impact height and e the nozzle size). Results reveal that, whatever the value of the Reynolds number, the air jet separates the cavity into two areas. Concerning the heat transfer, results show notably that, for whatever the value of each Reynolds number and for impact height considered in this study, the most intensive thermal exchanges are situated in the vicinity of the impact area of the jet on the bottom wall.
Source: Energy Procedia
Institutions: Université d’Antsiranana, Université de Perpignan
Language: English
Topic: Heat Transfer Mechanisms
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2776032017