Baranyi, László (2008) Effect of frequency ratio on the force coefficients of a cylinder oscillated in a uniform stream. In: 7th JSMEKSME Thermal and Fluids Engineering Conference, 2008.10.132008.10.16, Sapporo.

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Abstract
A finite difference solution is presented for 2D low Reynolds number flow around a circular cylinder placed in a uniform flow. The cylinder is oscillated inline or transversely or is moved along an elliptical path. Abrupt jumps between two state curves were found in the timemean (TM) and rootmeansquare (rms) values of the force coefficients under lockin conditions when plotted against frequency ratio. For orbital cylinder motion, jumps were found at certain frequency ratio values in the TM and rms values of all force coefficients and number and location of jumps were identical for all coefficients, similar to previous results plotted against ellipticity. When the cylinder was oscillated inline, sudden changes were found only for the TM of lift and torque coefficients. However, when the cylinder was oscillated in transverse direction only, none of the TM and rms curves showed any jumps. Pre and postjump analysis (flow patterns, limit cycle curves) revealed switches in vortex structure.
Item Type:  Conference or Workshop Item (Other) 

Additional Information:  MTMT: 1303421 In.: 7th JSMEKSME Thermal and Fluids Engineering Conference. Sapporo: 2008. Konferencia helye, ideje: Sapporo, Japán, 2008.10.13.2008.10.16. 
Subjects:  Q Science / természettudomány > QA Mathematics / matematika Q Science / természettudomány > QC Physics / fizika > QC03 Heat. Thermodinamics / hőtan, termodinamika T Technology / alkalmazott, műszaki tudományok > TJ Mechanical engineering and machinery / gépészmérnöki tudományok 
SWORD Depositor:  MTMT SWORD 
Depositing User:  MTMT SWORD 
Date Deposited:  25 Jul 2014 07:59 
Last Modified:  25 Jul 2014 08:00 
URI:  http://real.mtak.hu/id/eprint/13926 
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