Research output: Contribution to journal › Article › peer-review
Propagating helical waves as a building block of round turbulent jets. / Mullyadzhanov, R. I.; Sandberg, R. D.; Abdurakipov, S. S. et al.
In: Physical Review Fluids, Vol. 3, No. 6, 062601, 14.06.2018.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Propagating helical waves as a building block of round turbulent jets
AU - Mullyadzhanov, R. I.
AU - Sandberg, R. D.
AU - Abdurakipov, S. S.
AU - George, W. K.
AU - Hanjalić, K.
N1 - Publisher Copyright: © 2018 American Physical Society. uk.
PY - 2018/6/14
Y1 - 2018/6/14
N2 - Turbulent jets are known to support large-scale vortical wave packets traveling downstream. We show that a propagating helical wave represents a common form of the "optimal" eigenfunction tracking these structures from the near to the far field of a round jet issuing from a pipe. Two first mirror-symmetric modes containing around 5% of the total turbulent kinetic energy capture all significant large-scale events and accurately replicate the full shear-layer dynamics of the azimuthal wave number m=1. A family of the most energy-containing traveling waves represents low wave numbers and is described in terms of "empirical" dispersion laws.
AB - Turbulent jets are known to support large-scale vortical wave packets traveling downstream. We show that a propagating helical wave represents a common form of the "optimal" eigenfunction tracking these structures from the near to the far field of a round jet issuing from a pipe. Two first mirror-symmetric modes containing around 5% of the total turbulent kinetic energy capture all significant large-scale events and accurately replicate the full shear-layer dynamics of the azimuthal wave number m=1. A family of the most energy-containing traveling waves represents low wave numbers and is described in terms of "empirical" dispersion laws.
KW - COHERENT STRUCTURES
KW - INITIAL CONDITIONS
KW - AXISYMMETRICAL JET
KW - REYNOLDS-NUMBER
KW - FIELD
KW - FLOW
KW - MODES
KW - DYNAMICS
KW - VELOCITY
UR - http://www.scopus.com/inward/record.url?scp=85049784331&partnerID=8YFLogxK
U2 - 10.1103/PhysRevFluids.3.062601
DO - 10.1103/PhysRevFluids.3.062601
M3 - Article
AN - SCOPUS:85049784331
VL - 3
JO - Physical Review Fluids
JF - Physical Review Fluids
SN - 2469-990X
IS - 6
M1 - 062601
ER -
ID: 16357785