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The unsteady Stokes resistance of arbitrarily oriented, finite‐length cylinders

 

作者: M. Loewenberg,  

 

期刊: Physics of Fluids A  (AIP Available online 1993)
卷期: Volume 5, issue 11  

页码: 3004-3006

 

ISSN:0899-8213

 

年代: 1993

 

DOI:10.1063/1.858707

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The unsteady (oscillatory) Stokes resistance is numerically computed for finite‐length, circular cylinders using a first‐kind, boundary integral formulation for low and moderate dimensionless frequencies. Translational oscillations parallel and perpendicular to the cylinder axis (axial and transverse oscillations) are considered. For arbitrarily oriented cylinders with length‐to‐width ratios in the range: 1/10≤a/b≤10, a simple, previously proposed, expression accurately (±5%) describes the oscillatory Stokes resistance at all frequencies in terms of steady Stokes and inviscid flow resistance parameters. Numerical calculations for spheroids agree with previous results; the results for cylinders and transverse oscillations of oblate spheroids are new.

 

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