Impact of Longitudinal Acceleration and Deceleration on Bluff Body Wakes
نویسندگان
چکیده
منابع مشابه
Linear feedback control of bluff body wakes
In this project, linear feedback control is used to modify the dynamics of fluid flows. We focus on two system identification and controller design strategies that target separated wakes behind bluff bodies. In particular, we aim to reduce the form drag and suppress the large fluctuations that typically develop in such wakes and are detrimental to efficiency and safety in a large number of indu...
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TECHNICAL NOTES are short manuscripts describing new developments or important results of a preliminary nature. These Notes cannot exceed six manuscript pages and three figures; a page of text may be substituted for a figure and vice versa. After informal review by the editors, they may be published within a few months of the date of receipt. Style requirements are the same as for regular contr...
متن کاملThe Physical Mechanism of Transition in Bluff Body Wakes
The physical nature of the initial transition to three-dimensionality of #ow past a circular cylinder has been the subject of considerable debate in the literature. Of several proposed mechanisms, the possibility of classi"cation as an elliptical instability is re-examined in this article. Detailed Floquet analysis of the transition shows clear evidence of the growth of an elliptic instability ...
متن کاملOn three-dimensional quasiperiodic Floquet instabilities of two-dimensional bluff body wakes
Previous studies dealing with Floquet secondary stability analysis of the wakes of circular and square cross-section cylinders have shown that there are two synchronous instability modes, with long ~mode A! and short ~mode B! spanwise wavelengths. At intermediate wavelengths another mode arises, which reaches criticality at Reynolds numbers higher than modes A or B. Here we concentrate on these...
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ژورنال
عنوان ژورنال: Fluids
سال: 2019
ISSN: 2311-5521
DOI: 10.3390/fluids4030158