BibTex format
@unpublished{Rigas:2017,
author = {Rigas, G and Esclapez, L and Magri, L},
title = {Symmetry breaking in a 3D bluff-body wake},
url = {http://hdl.handle.net/10044/1/73438},
year = {2017}
}
Publications
Citation
RIS format (EndNote, RefMan)
TY - UNPB
AB - The dynamics of a three-dimensional axisymmetric blu -body wake are examined at low Reynolds regimes where transitions take place through spatio-temporal symmetry breaking. A linear stability analysis is employed to identify the critical Reynolds num- ber associated with symmetry breaking, and the associated eigenmodes, known as global modes. The analysis shows that the axisymmetric stable base ow breaks the rotational symmetry through a pitchfork m = 1 bifurcation, in agreement with previously reported results for axisymmetric wakes. Above this threshold, the stable base ow is steady and three-dimensional with planar symmetry. A three-dimensional global stability analysis around the steady re ectionally symmetric base ow, assuming no homogeneous direc- tions, predicts accurately the Hopf bifurcation threshold, which leads to asymmetric vortex shedding. DNS simulations validate the stability results and characterize the ow topology during the early chaotic regime.
AU - Rigas,G
AU - Esclapez,L
AU - Magri,L
PY - 2017///
TI - Symmetry breaking in a 3D bluff-body wake
UR - http://hdl.handle.net/10044/1/73438
ER -