Abstract
The role of helicity in Lagrangian turbulence is investigated using direct numerical simulation of homogeneous isotropic turbulence. Probability density functions and autocorrelations along a fluid particle trajectory associated with geometric quantities such as curvature and torsion of the Lagrangian trajectory are provided. The relationship between helicity and the ratio of torsion to curvature is investigated. We found that probability density functions of torsion and torsion normalized by curvature clearly show well-established slope in log-log plots. Finally, the relationship between helicity, acceleration and geometric quantities are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 482-487 |
| Number of pages | 6 |
| Journal | International Journal of Heat and Fluid Flow |
| Volume | 31 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2010 Jun 1 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes
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Helicity and geometric nature of particle trajectories in homogeneous isotropic turbulence. / Choi, Yeontaek; Park, Yongnam; Lee, Chang Hoon.
In: International Journal of Heat and Fluid Flow, Vol. 31, No. 3, 01.06.2010, p. 482-487.Research output: Contribution to journal › Article
TY - JOUR
T1 - Helicity and geometric nature of particle trajectories in homogeneous isotropic turbulence
AU - Choi, Yeontaek
AU - Park, Yongnam
AU - Lee, Chang Hoon
PY - 2010/6/1
Y1 - 2010/6/1
N2 - The role of helicity in Lagrangian turbulence is investigated using direct numerical simulation of homogeneous isotropic turbulence. Probability density functions and autocorrelations along a fluid particle trajectory associated with geometric quantities such as curvature and torsion of the Lagrangian trajectory are provided. The relationship between helicity and the ratio of torsion to curvature is investigated. We found that probability density functions of torsion and torsion normalized by curvature clearly show well-established slope in log-log plots. Finally, the relationship between helicity, acceleration and geometric quantities are discussed.
AB - The role of helicity in Lagrangian turbulence is investigated using direct numerical simulation of homogeneous isotropic turbulence. Probability density functions and autocorrelations along a fluid particle trajectory associated with geometric quantities such as curvature and torsion of the Lagrangian trajectory are provided. The relationship between helicity and the ratio of torsion to curvature is investigated. We found that probability density functions of torsion and torsion normalized by curvature clearly show well-established slope in log-log plots. Finally, the relationship between helicity, acceleration and geometric quantities are discussed.
UR - http://www.scopus.com/inward/record.url?scp=77953232450&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77953232450&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatfluidflow.2009.12.003
DO - 10.1016/j.ijheatfluidflow.2009.12.003
M3 - Article
AN - SCOPUS:77953232450
VL - 31
SP - 482
EP - 487
JO - International Journal of Heat and Fluid Flow
JF - International Journal of Heat and Fluid Flow
SN - 0142-727X
IS - 3
ER -