DEPENDENCE OF FLOW BEHAVIOR AND AERODYNAMIC CHARACTERISTICS ON THE SIZE OF SQUARE CYLINDERS IN VEE-ARRANGEMENT

A two-dimensional finite volume method and a full multi-grid technique are used to scrutinize the influence of the arrangement of three cylinders, which are placed in four different configurations, and their corresponding dimensions on the characteristics of flow. Four main combinations are adopted in terms of the cylinder positions while the influence of various parameters, namely, the cylinder with their corresponding dimensions and the Reynolds number (Re) variation on the flow behavior is discussed. The flow patterns, critical Reynolds number, and force coefficients are computed for the four arrangements in terms of streamlines, iso-vortices, and drag coefficient (CD) evolutions. Of great interest is the analysis of the combined effect of the Reynolds number and of the adopted arrangements on the bifurcation emergence phenomenon and the CD evolution profiles. The numerical outcomes demonstrate that Re values, different arrangements of cylinders, and dimension variations of each square cylinder have a prominent influence on the flow characteristics.
A two-dimensional finite volume method and a full multi-grid technique are used to scrutinize the influence of the arrangement of three cylinders, which are placed in four different configurations, and their corresponding dimensions on the characteristics of flow. Four main combinations are adopted in terms of the cylinder positions while the influence of various parameters, namely, the cylinder with their corresponding dimensions and the Reynolds number (Re) variation on the flow behavior is discussed. The flow patterns, critical Reynolds number, and force coefficients are computed for the four arrangements in terms of streamlines, iso-vortices, and drag coefficient (CD) evolutions. Of great interest is the analysis of the combined effect of the Reynolds number and of the adopted arrangements on the bifurcation emergence phenomenon and the CD evolution profiles. The numerical outcomes demonstrate that Re values, different arrangements of cylinders, and dimension variations of each square cylinder have a prominent influence on the flow characteristics. Автор:  Salwa Fezai, Fakher Oueslati and Brahim Ben-Beya
Ключевые слова:  vee-arrangement, size of square obstacle, incompressible fluid flow, Reynolds number, vortex shedding, regimes of flow, aerodynamic forces
Стр:  665