Numerical Modelling of Drag Forces in Micro mechanical Beams Array

Yadav, Mukul (2016) Numerical Modelling of Drag Forces in Micro mechanical Beams Array. Masters thesis, Indian Institute of Technology Hyderabad.

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Abstract

Recent thrust in the design of sensitive sensors and actuators have motivated many researchers to optimize various parameters of micro and nano scale devices. It is found that the performance of most of the dynamic sensors is influence by the resonance frequency and quality factor. Since, the quality factor is inversely proportional to different internal and external dissipation mechanisms at that scale, it is imperative to study and control dominant damping mechanism. Fluid damping is found to be the dominant mechanism for the devices which operate at atmospheric pressure.It mainly consists of squeeze film damping and damping due to drag. As the size of mechanical structure reduces, the influence of squeeze- film damping reduces and the drag force becomes dominant.The computation of drag force has been the subject of research since many decades in the field of aerospace engineering. However, it regained renewed interest with the advent of micro and nanotechnology.

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