Heat Transfer By Unsteady Laminar Mixed
Convection In 2-D Ventilated Enclosures Using
The Vorticity-stream Function Formulation
Author(s)
S. Boudebous & Z. Nemouchi
Abstract
In this work, a numerical study is presented of mixed laminar convection in
ventilated enclosures. The left vertical wall of enclosure is maintained at a
constant temperature greater than that of the fluid at entry, while the other walls
are adiabatic. Two cases of ventilation are considered. In the first case, the fluid
enters from the bottom left corner and leaves the domain through the right upper
corner. In the second case, the fluid enters from the bottom left corner and leaves
the domain through the middle of the upper wall.
The equations governing the phenomenon are discretised using the finitedifference
method. A computer programme is developed to simulate the flow
behaviour and the heat transfer in the enclosure. Velocity and temperature fields
are obtained. These numerical simulations are performed for a Grashof number
of 106, a Prandlt number of 0.7 and three values of the Richardson number (0.5,
5, and 25)
Keywords: mixed convection, vorticity-stream function formulation, square
enclosure, numerical method.
1 Introduction
An interesting review on natural convection in enclosures can be found in Fusegi
and Hyun [1]. Concerning the subject of the present work, numerous
investigations have been reported. We can cite as examples:
Unsteady 2-D hot water flow for energy extraction from a storage system, Cha
and Jaluria [2] with cold water inlet at the bottom of the left vertical wall and hot
water exit at the top of the same or opposite wall. Unsteady 2-D flow of air, Raji
Keywords
mixed convection, vorticity-stream function formulation, square
enclosure, numerical method.
Related Book
Other papers in this volume
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