Mixed Convection Heat Transfer in a Channel in Presence of Baffles

10 Pages Posted: 16 Apr 2019 Last revised: 31 May 2019

See all articles by Rabah Henniche

Rabah Henniche

University Yahia Fares of Medea

Abdelkader Korichi

University Yahia Fares of Medea

Farouk Ziane

University Yahia Fares of Medea

Date Written: April 10, 2019

Abstract

Mixed convection heat transfer enhancement of laminar unsteady flow in a baffled and asymmetrically heated vertical channel is numerically studied. The baffles are installed on both walls in an offset manner. The governing equations are solved by the finite volume method using OpenFOAM code. Air (Pr = 0.71) is used as the working fluid. The effects of Reynolds number (100–1400) and Grashof number (2.5 × 104 to 2 × 105) in addition to the baffle height (0.1–0.5) on heat transfer and friction factor are evaluated. The results obtained indicated that the flow passes to the self-sustained oscillatory flow at moderate Reynolds number (below 600 for a blockage ratio of 0.25). Unsteady self- sustained flow leads to heat transfer enhancement up to 2.8 times for baffle height hb = 0.25 and up to 3.7 times for baffle height hb = 0.5 as compared to the smooth channel.

Keywords: Heat Transfer, Finite Volume Method, Mixed Convection, Oscillatory Flow

Suggested Citation

Henniche, Rabah and Korichi, Abdelkader and Ziane, Farouk, Mixed Convection Heat Transfer in a Channel in Presence of Baffles (April 10, 2019). 2nd National Conference on Computational Fluid Dynamics & Technology 2018 (CFD & Tech 2018). Available at SSRN: https://ssrn.com/abstract=3371803 or http://dx.doi.org/10.2139/ssrn.3371803

Rabah Henniche (Contact Author)

University Yahia Fares of Medea ( email )

Medea
Algeria

Abdelkader Korichi

University Yahia Fares of Medea ( email )

Medea
Algeria

Farouk Ziane

University Yahia Fares of Medea ( email )

Medea
Algeria

Register to save articles to
your library

Register

Paper statistics

Downloads
25
Abstract Views
118
PlumX Metrics