Viscous Force Constant for a Closed Cylinder
1960; American Institute of Physics; Volume: 32; Issue: 6 Linguagem: Inglês
10.1063/1.1730995
ISSN1520-9032
Autores Tópico(s)Scientific Research and Discoveries
ResumoThe viscous force constant of a moving cylinder closed at the ends has been calculated including first-order effects in width (2b)/length (2a). Experimental results, obtained for macroscopic models, are in essential agreement with this. For a/b>20 the discrepancy is about 8%, for shorter cylinders near 20%. With the force on a cylinder moving sideways given by F=8πηav/(σ—γ), where σ=log2a/b, it is found that γ(σ>2)=0.35–4(1/σ—0.43)2±0.25. For a translation lengthwise, with F=4πηav/(σ—γ), the relation γ(σ>2)=1.30–8(1/σ—0.30)2±0.25 holds.
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