Open Access

ARTICLE

NUMERICAL STUDY AND CORRELATIONS DEVELOPMENT ON TWIN-PARALLEL JETS FLOW WITH NON-EQUAL OUTLET VELOCITIES

Nidhal Hnaien^a , Salwa Marzouk^a , Lioua Kolsi^a,b,*, Abdullah A.A.A. Al-Rashed^c , Habib Ben Aissia^a , Jacques Jay^d

a Unit of Metrology and Energy Systems, National Engineering School of Monastir, Monastir University, Tunisia
b College of Engineering, Mechanical Engineering Department, Haïl University, Haïl City , Saudi Arabia
c Dept. of Automotive and Marine Engineering Technology, College of Technological Studies, the Public Authority for Applied Education and Training, Kuwait
d Thermal Center of Lyon (CETHIL - UMR CNRS 5008), INSA Lyon, France

* Corresponding Author: Email:

Frontiers in Heat and Mass Transfer 2018, 11, 1-11. https://doi.org/10.5098/hmt.11.8

Abstract

The purpose of the present paper is to numerically investigate two plane turbulent parallel jets using CFD model. A parametric study was carried out to evaluate the simultaneous effect of the nozzle spacing and the velocity ratio on the merge point (MP), the combined points (CP) as well as the upper (UVC) and lower (LVC) vortices centers positions. Results show that the velocity ratio significantly affects twin-parallel jets flow structure. In fact, increasing the velocity ratio moves the MP, CP, UVC and LVC further upstream along the longitudinal direction while deflecting toward the stronger jet along the transverse direction. Due to the merge and combined points main role on the merging process launching and interruption, correlations predicting the merge and combined points positions are provided as a function of the nozzle spacing and the velocity ratio. These correlations are of major importance in the quick estimate of these characteristics points positions which manage two parallel jets flow in various industrial applications.

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Keywords

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