@article{(Open Science Index):https://publications.waset.org/pdf/9997454, title = {Multiscale Structures and Their Evolution in a Screen Cylinder Wake }, author = {Azlin M. Azmi and T. Zhou and A. Rinoshika and L. Cheng}, country = {}, institution = {}, abstract = {The turbulent structures in the wake (x/d =10 to 60) of a screen cylinder have been educed to understand the roles of the various structures as evolving downstream by comparing with those obtained in a solid circular cylinder wake at Reynolds number, Re of 7000. Using a wavelet multiresolution technique, the flow structures are decomposed into a number of wavelet components based on their central frequencies. It is observed that in the solid cylinder wake, large-scale structures (of frequencyf0 and 1.2 f0) make the largest contribution to the Reynolds stresses although they start to lose their roles significantly at x/d> 20. In the screen cylinder wake, the intermediate-scale structures (2f0 and 4f0) contribute the most to the Reynolds stresses atx/d =10 before being taken over by the large-scale structures (f0) further downstream. }, journal = {International Journal of Mechanical and Mechatronics Engineering}, volume = {8}, number = {2}, year = {2014}, pages = {149 - 156}, ee = {https://publications.waset.org/pdf/9997454}, url = {https://publications.waset.org/vol/86}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 86, 2014}, }