Simulation of airflow inside 1.8-in hard disk drive at valrious rotational speeds (Thai)

Abstract

In this paper, the behavior of the turbulence airflow field caused by the spinning of the single disk inside a 1.8 inch Hard Disk Drive (HDD) in the market at various rotational speeds was investigated. Commercial software (Fluent Software) using the RNG k-epsilon turbulence model was used to simulate. The single arm position at Outer Diameter (OD-Position) was studied. Pressure and velocity showed the flow pattern. We observed that the pressure at the center of the disk was a negative pressure, which increased to a positive pressure along the disk radius. The magnitude of velocity of airflow increased linearly along the disk radius. When the rotational speed was increased, pressure and velocity also increased. The velocity path line of airflow inside the HDD was similar for all rotational speeds. This information can be used for vibration analysis of the actuator arm.