Study the effect of actuator arm position on airflow in hard disk drive.(Thai)

Abstract

This article is concerned with the airflow passing through the actuator arm of a hard disk drive and studies only the actuator arm of a 3.5" hard disk drive with rotation speed of 7,200 rpm. The study used commercial fluid dynamics computation software by the Large Eddy Simulation method to simulate airflow conditions, considering only the area around the arm. Then, simulations with different arm positions being outer disk position, middle disk position and inner disk position were made to obtain numerical results. The results show the inner disk position has most affect on the flow from comparison of static pressure and power spectral density on each arm surface.