Numerical simulation of thermal protection

with liquid film along a vertical channel

 

B. Er-raha*, M. Feddaoui, H. Meftah, A. Mir

Laboratoire de Génie des Procédés et de l'Energie (LGPE)

ENSA , B.P. 1136, Agadir,  Morocco

* Corresponding author. E-mail: erraha@ensa-agadir.ac.ma

Received: 08 March 2006; revised version accepted:12 September 2006

 

Abstract

     A numerical study is reported to investigate a laminar mixed convection heat and mass transfer with thermal protection of channel walls subjected to a hot gas stream by using liquid film falling along a vertical channel. The walls are assumed to be thermally insulated. A marching procedure is employed for solution of the coupled governing equations for the liquid film and gas stream together. Parametric computations were performed to investigate the effects of Reynolds number, inlet temperature of hot gas stream and inlet liquid mass flow rate on the effectiveness of the walls protection. Results indicate that the liquid film can well protect the channel walls from a hot gas stream. Additionally, significant protection is observed for the system with a higher  and for lower .

 

Keywords: Numerical simulation; Heat and Mass transfer; Evaporation; Thermal protection.

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