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Effect of the coflow stream on a plane wall jet
Authors:Syrine Ben Haj Ayech  Sabra Habli  Nejla Mahjoub Saïd  Hervé Bournot  George Le Palec
Institution:1. LGM, Ecole Nationale d’Ingénieurs de Monastir, Université de Monastir, Monastir, Tunisia
2. LGM, ENIM, Institut Préparatoire aux Etudes d’Ingénieurs de Monastir, Université de Monastir, Monastir, Tunisia
3. Aix-Marseille Université, CNRS, IUSTI UMR 7343, 13013, Marseille, France
Abstract:We propose in this work to study an isothermal and a non-isothermal laminar plane wall jet emerging in a coflow steam. The numerical solution of the governing equations was performed by a finite difference method. In this work, we are interested in the study of the influence of Grashof numbers on the wall jet emerging in a medium at rest. Further, we will examine the effect of the coflow stream on the behavior of the dynamic and thermal properties of the wall jet subjected to a constant temperature. A comparison with a simple wall jet is carried out. The results show that for a buoyant wall jet, two parameters can influence the flow: the inertial and buoyancy forces. The velocity effect indicates that the potential core length increases with the velocity ratio. We are also showed that when using a momentum length scale, the normalized longitudinal maximum velocity can reach an asymptotic curve at different velocity ratios.
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