3-D scanning-particle-image-velocimetry: Technique and application to a spherical cap wake flow
- Ch. Brücker
- … show all 1 hide
Rent the article at a discountRent now
* Final gross prices may vary according to local VAT.Get Access
A 3-D time-resolving and whole-volume Digital-Particle-Image-Velocimetry (DPIV) technique based on the concept of a scanning light-sheet is presented and applied here to the 3-D transient wake phenomena in the spherical cap wake flow. The technique uses a scanning light-sheet for rapid sampling of the flow in depth and a two-camera recording system for stereoscopic 3-D DPIV. Application of a correlation technique in combination with a calibration yields, aside from the correct in-plane displacement, also the out of plane component and thus the total velocity vectors within the planes of the scanning light-sheet. With a high scanning rate in comparison to the characteristic time scales the method provides the 3-D velocity field in space and time. Through the use of conventional video-techniques the temporal evolution of the complete velocity and vorticity field can be obtained quantitatively from experiments. This is demonstrated for the 3-D starting flow around a spherical cap at Re=300. During the starting process, the flow in the wake evolves into a spherical vortex ring where the velocity distribution is very close to the theoretical solution of the Hill-type vortex. Later on, the Hill-type vortex ring deforms and the flow changes from a rotational symmetric stage to a planar symmetric flow with a double-threaded vortical structure which consists of two counter-rotating streamwise vortices similar to the ones observed in sphere wake flow.
- Meng, H. and Hussain, F., Holographic particle image velocimetry: A 3D measurment technique for vortex interactions, coherent structures and turbulence.Fluid Dynamic Research 8 (1991) 33–52. CrossRef
- Adrian, R.J., Particle-imaging techniques for experimental fluid mechanics,Ann. Rev. Fluid Mech. 23 (1991) 261–304.
- Hinsch, K., Three-dimensional particle velocimetry.Measuring Science and Technology 6(6) (1995) 742–753. CrossRef
- Sinha, S.K. and Kuhlman, P.S., Investigating the use of stereoscopic particle streak velocimetry for estimating the three-dimensional vorticity field.Experiments in Fluids 12 (1992) 377–384. CrossRef
- Brücker, Ch., Dreidimensionale quantitative Vermessung des Wirbelaufplatzens mit der Particle-Tracking-Velocimetry (PTV) kombiniert mit Lichtschnitt-Scanning. DGLR-Rep. 92 (1992) pp. 445–454.
- Brücker, Ch. and Althaus, W., Study of vortex breakdown by particle tracking velocimetry (PTV). Part 1: Bubble-type vortex breakdown.Experiments in Fluids 13 (1992) 339–349. CrossRef
- Brücker, Ch., Digital Particle Image Velocimetry (DPIV) in a scanning light-sheet: 3-D starting flow around a short cylinder,Experiments in Fluids 19(4) (1995) 371–380. CrossRef
- Kimura, I. and Kohno, Y., Measurement of three-dimensional velocity vectors in a flow field based on spatio-temporal image correlation. In:FLUCOME 91 (1991) pp. 609–615.
- Raffel, M., Gharib, M., Ronneberger, O. and Kompenhans, J., Feasibility study of three-dimensional PIV by correlating images of particles within paralle light sheet planes.Experiments in Fluids 19(2) (1995) 69–77. CrossRef
- Brücker, Ch., A new method for determination of the out-of-plane component in 3-D PIV using a color-coded light-sheet and spatial correlation: Simulation and feasibility study for 3-D Scanning PIV. In: Conference Trans.Optical Methods and Data Processing in Heat and Fluid Flow, City Univ. London, 18–19 April (1996) pp. 189–200.
- Gauthier, V. and Riethmuller, M.L., Application of PIDV to complex flows: Measurement of the third component. In:Particle Image Displacement Velocimetry, VKI Lect. Ser. 1988–06, Belgium, March 21–25 (1988), pp. 1–24.
- Prasad, A.K. and Adrian, R.J., Stereoscopic particle image velocimetry applied to liquid flows.Experiments in Fluids 15 (1993) 49–60. CrossRef
- Westerweel, J. and Nieuwstadt, F.T.M., Performance tests on 3-dimensional velocity measurements with a two-camera digital particle-image-velocimeter. In:ASME Conference Laser Anemometry, Vol. 1 (1991) pp. 349–355.
- Brücker, Ch., Study of the 3-D flow in a T-Junction using a Dual-Scanning method for 3-D Scanning-Particle-Image-Velocimetry (3-D SPIV). In:Proc. 10th Symp. Turbulent Shear Flows, Penn State University, 14–16 August (1995) pp. (7–19)–(7–24).
- Adamczyk, A.A. and Rimai, L., Reconstruction of a 3-dimensional flow field from orthogonal views of seed track video images.Experiments in Fluids 6 (1988) 380–386.
- Coppus, J.H.C., Rietema, K. and Ottengraf, S.P.P., Wake phenomena behind spherical-cap bubbles and solid spherical-cap bodies.Transaction Instn. Chemical. Engineers 55 (1977) 122–129.
- Wegener, P.P. and Parlange, J.Y., Sperical-cap bubbles.Annual Review Fluid Mechanics 5 (1973) 79–100. CrossRef
- Magarvey, R.H. and MacLatchy, C.S., Vortices in sphere wakes.Canadian Journal Physics 43 (1965) 1649–1656.
- Willert, C. and Gharib, M., Digital Particle Image Velocimetry.Experiments in Fluids 10 (1991) 181–1943. CrossRef
- Hnat, J.G. and Buckmaster, J.D., Spherical cap bubbles and skirt formation.Physics of Fluids 19(2) (1976) 182–194. CrossRef
- Batchelor, G.K.,An Introduction to Fluid Mechanics. Cambridge: Cambridge University Press (1967).
- Viets, H., Accelerating sphere-wake interaction.AIAA J. 9(10) (1971) 2087–2089.
- Magarvey, R.H. and Bishop, R.L., Transition ranges for three-dimensional wakes.Canadian Journal Physics 39 (1961) 1418–1422.
- 3-D scanning-particle-image-velocimetry: Technique and application to a spherical cap wake flow
Applied Scientific Research
Volume 56, Issue 2-3 , pp 157-179
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- 3-D PIV
- scanning light sheet
- spherical cap wake
- sphere wake
- transitional flow
- Industry Sectors
- Ch. Brücker (1)
- Author Affiliations
- 1. Aerodynamisches Institut, RWTH Aachen, Templergraben 55, 52062, Aachen, Germany