Abstract
In this paper, a three-dimensional inviscid vortex filament method is used to illustrate the formation mechanism of counter-rotating longitudinal vortices found in the wake of a bluff body. A vortex filament is introduced into the velocity field of an ideal Karman vortex street, and its three-dimensional evolution is tracked in the Lagrangian frame of reference. It is demonstrated that a localized perturbation, consisting of a small displacement of the vortex filament, spreads across the span of the filament, due to self-induction, to form wave-type pattern. The 'waves' are further stretched due to the background velocity field of the vortex street, forming counter-rotating longitudinal vortices.
| Original language | English |
|---|---|
| Title of host publication | Boundary Layer and Free Shear Flows |
| Publisher | American Society of Mechanical Engineers |
| Pages | 187-194 |
| Number of pages | 8 |
| ISBN (Print) | 0791813673 |
| Publication status | Published - 1 Jan 1994 |
| Event | Proceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18) - Lake Tahoe, NV, USA Duration: 19 Jun 1994 → 23 Jun 1994 |
Publication series
| Name | American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED |
|---|---|
| Volume | 184 |
Conference
| Conference | Proceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18) |
|---|---|
| City | Lake Tahoe, NV, USA |
| Period | 19/06/94 → 23/06/94 |
Cite this
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Vortex filament simulation of the longitudinal vortices found in the wake of a bluff body. / Wu, J.; Sheridan, J.; Welsh, M. C.
Boundary Layer and Free Shear Flows. American Society of Mechanical Engineers, 1994. p. 187-194 (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED; Vol. 184).Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other
TY - GEN
T1 - Vortex filament simulation of the longitudinal vortices found in the wake of a bluff body
AU - Wu, J.
AU - Sheridan, J.
AU - Welsh, M. C.
PY - 1994/1/1
Y1 - 1994/1/1
N2 - In this paper, a three-dimensional inviscid vortex filament method is used to illustrate the formation mechanism of counter-rotating longitudinal vortices found in the wake of a bluff body. A vortex filament is introduced into the velocity field of an ideal Karman vortex street, and its three-dimensional evolution is tracked in the Lagrangian frame of reference. It is demonstrated that a localized perturbation, consisting of a small displacement of the vortex filament, spreads across the span of the filament, due to self-induction, to form wave-type pattern. The 'waves' are further stretched due to the background velocity field of the vortex street, forming counter-rotating longitudinal vortices.
AB - In this paper, a three-dimensional inviscid vortex filament method is used to illustrate the formation mechanism of counter-rotating longitudinal vortices found in the wake of a bluff body. A vortex filament is introduced into the velocity field of an ideal Karman vortex street, and its three-dimensional evolution is tracked in the Lagrangian frame of reference. It is demonstrated that a localized perturbation, consisting of a small displacement of the vortex filament, spreads across the span of the filament, due to self-induction, to form wave-type pattern. The 'waves' are further stretched due to the background velocity field of the vortex street, forming counter-rotating longitudinal vortices.
UR - http://www.scopus.com/inward/record.url?scp=0028112884&partnerID=8YFLogxK
M3 - Conference Paper
SN - 0791813673
T3 - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
SP - 187
EP - 194
BT - Boundary Layer and Free Shear Flows
PB - American Society of Mechanical Engineers
ER -