فصلنامه
نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه اراک، اراک، ایران
2 گروه مهندسی ساخت و تولید، دانشکده فنی و مهندسی، دانشگاه اراک، اراک، ایران
3 دانشگاه اراک
4 دانشگاه دیکینز، استرالیا
کلیدواژهها
عنوان مقاله English
نویسندگان English
Ultrasonic levitation, as an advanced non-contact particle manipulation technology, has gained prominence in modern research due to its independence from material physical properties and extensive applications in fields such as pharmaceuticals, microelectronics, and sonochemistry. However, optimal utilization of this technology requires a deep insight into parameters affecting particle stability and dynamics. In this study, the impact of initial particle release position—a less-explored key factor—on the dynamic behavior of particles levitated in an ultrasonic levitation system was investigated. Acoustic pressure at 20 kHz was modeled using Multiphysics simulation in COMSOL software, and the behavior of 20 polypropylene particles (diameter: 3 mm, density: 910 kg/m³) at various initial positions (ranging from 0.23 to 8.01) was analyzed. Drag forces, acoustic pressure forces, and gravitational forces were considered effective forces. Results revealed that particles released near pressure nodes exhibited the lowest oscillation amplitude and shortest stabilization time. As the initial release distance from pressure nodes increased, both oscillation amplitude and stabilization time increased. This factor’s influence on stabilization time was more pronounced near the reflector than near the transducer, indicating that particles released close to the reflector achieve a more stable levitated state compared to those released close to the transducer. Experimental validation showed significant agreement with simulation results.
کلیدواژهها English
