Dinamika Pusat Rotasi Fluida Pada Proses Difusi Penggabungan Vorteks

Abstract

This research aims to analyze effect of vortex position at center of fluid gyration on diffusion process of vortex merging. This research was done experimentally in a water tank. Vortex was generated with suck fluid through a channel at underside of tank with pump. The distance of the vortex to center of gyration was varied as 4, 6, 8, 10 cm. Data taken with measuring each vortex radius and distance of vortex separation. The result of research showed that vortex residing in centered of fluid rotation has longer diffusion time compared with vortex residing eccentrically and it becomes dominant vortex in process of merging. This matter caused by existence of conservation of angular momentum and influence of shear stress during rotation of vortex. Increase of distance of vortex separation will cause increase diffusion time so that the transport phenomenon will be predominated by diffusion process