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Engineering
Mechanical Engineering
Damping and friction in syringe equation of motion
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[QUOTE="mamech, post: 6840803, member: 531139"] For simplification you can consider it water for the time being. For comment (1), I agree, and I think all are constants, while only flow rate increase affects reynolds number, and hence affects the viscous damping coefficient. This is also an interesting point that I missed. so when weh talk about damping here, we have 2 velocities to talk about, the one at nozzel and the other at syringe body, and it is logical that damping at nozzel is the dominant part, so all calculations should be referred to it. but does this means, that I should in equation one substitute the velocity with its value on nozzel, to be representative for the major damping source?For comment (3), I understand what you want to say, but for example, we know that wider car tyres gives more stability, and snow shoes have bigger contact area with ground than running shoes. If area does not change anything in regard to friction force, then why such applications exist, and work efficiently? [/QUOTE]
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Damping and friction in syringe equation of motion
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