Air+damping

Air+damping - SEN2MET Air damping Air damping Squeeze-film...

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SEN2MET Air damping
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Air damping Squeeze-film damping Slide-film damping •Estimating the damping effects of the micro-system is one of the most important steps in the design process, since they determine the dynamic performance of the device Drag force damping
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Viscosity of a fluid Viscosity is internal friction between adjacent layers moving with different velocities Viscosity of most liquides decrease with temperature Viscosity of a gas increase with temperature Flow in x-direction with velocity u
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Viscosity of fluid Temperature dependence The Sutherland empirical formula Power of T slightly exceeds 1/2
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Drag force on moving object Used when the beam or bridge is far away from the surrounding boundary. Force found by solving the Navier-Stokes equation D=2r U=v Valid for small Reynolds number: 1 Re   D
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Effect of air damping on microstructures Sphere moving in a fluid. Acceleration more significant
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This note was uploaded on 05/30/2011 for the course SEN 2MET taught by Professor Ulrikhanke during the Spring '11 term at VCU.

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Air+damping - SEN2MET Air damping Air damping Squeeze-film...

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