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Sharma, D.M. (author), Poddar, K. (author)Wind tunnel experiments were carried out at low speed aerodynamics lab at IIT Kanpur to investigate dynamic stall characteristics for a flow past an oscillating NACA 0015 airfoil at various reduced frequencies (k). The NACA airfoil model was design and developed to incorporate simultaneous surface pressure measurement at the mid-span of the...conference paper 2013
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Kähler, C.J. (author), Cierpka, C. (author), Scharnowski, S. (author), Manhart, M. (author), Sciacchitano, A. (author), Lynch, K. (author), Scarano, F. (author), Wieneke, B. (author), Willert, C. (author), Jeon, Y. J. (author), Chatellier, L. (author), Augereau, L. (author), Tremblais, B. (author), David, L. (author)Classical Particle Image Velocimetry (PIV) uses two representations of the particle image distribution to determine the displacement of the particle image pattern by spatial cross-correlation. The accuracy and the robustness are however limited by the fact that only two representations at t and t +?t are present. Thus, only a first order...conference paper 2013
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Thomsen, A.F. (author)Toen mij om een bijdrage aan de Leerhuis-reeks van PMB werd gevraagd, vroeg ik me even af waarom er een beroep werd gedaan op een betrekkelijk oud heertje als André Thomsen. Ik kon eigenlijk maar één reden bedenken. Naar mijn gevoel moeten we in mijn vakgebied – woningbeheer – terug naar af. Daar zijn de omstandigheden ook naar. En als je dan...book chapter 2013
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Buchmann, N.A. (author), Atkinson, C. (author), Honnery, D. (author), Soria, J. (author)This paper demonstrates ultra-high-speed tomographic digital in-line holographic velocimetry measurements of the three-component, three-dimensional velocities and trajectories of micron-sized particles in a supersonic underexpanded jet flow. In high-speed digital in-line holography the depth resolution of the measurement is severely restricted...conference paper 2013
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Percin, M. (author), De Baar, J.H.S. (author), Van Oudheusden, B.W. (author), Dwight, R.P. (author)The work explores the three-dimensional unsteady wake of a flapping-wing Micro Air Vehicle (MAV) ‘DelFly II’, applying a Kriging regression technique for the spatial regression of time-resolved Stereoscopic Particle Image Velocimetry (Stereo-PIV) data. In the view of limited number of measurement planes, the particular objective of the...conference paper 2013
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Cornic, P. (author), Champagnat, F. (author), Cheminet, A. (author), Leclaire, B. (author), Le Besnerais, G. (author)Back to physical particles is the idea behind this paper. We introduce the physically sound Point Spread Function (PSF) model for tomographic PIV reconstruction, that aims at sparse and spiky reconstructions. Using the PSF, we show that the tracer particles are quasi-systematically in the direct vicinity of local maxima of reconstructions...conference paper 2013
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De Silva, C.M. (author), Atkinson, C. (author), Buchmann, N.A. (author), Gnanamanickam, E.P. (author), Hutchins, N. (author), Sotia, J. (author), Marusic, I. (author)Here we describe the use of a nested high magnification camera configuration within a large field of view (FOV) PIV experiment. The objective of these measurements is to obtain instantaneous velocity flow fields to resolve the wide range of scales present in turbulent boundary layers at high Reynolds numbers of up to Re ? 20000. Flow statistics...conference paper 2013
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Seo, K. (author)This paper describes the hysteresis in the aerodynamic properties of a discus near to its stalling angle. Wind tunnel tests were carried out with a full-size womans discus. The experimental aerodynamic data D, L and M were obtained from wind tunnel tests as functions of the angle of attack. It was found that the drag, lift and pitching moment...conference paper 2013
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Atkinson, C. (author), Buchmann, N.A. (author), Amili, O. (author), Soria, J. (author)Three-dimensional spatial filtering and measurement noise associated with experimental particle image velocimetry (PIV) measurements of wall-bounded flows are investigated via the application of the noiseless transfer function of PIV to the results of direct numerical simulations (DNS) and the comparison with real PIV measurements undertaken at...conference paper 2013
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Kim, H.D. (author), Yi, S.J. (author), Kim, K.C. (author)This paper reports a technique for measuring the velocity and dissolved oxygen (DO) concentration fields simultaneously in a micro-scale water flow using oxygen sensitive particles (OSParticles) and a conventional micro particle image velocimetry (?-PIV) method. The OSParticles were fabricated using a dispersion polymerization method by...conference paper 2013
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Charonko, J. (author), Voigt, E. (author), Vlachos, P.1 (author)Since the adoption of digital video cameras and cross-correlation methods for particle image velocimetry (PIV), the use of color images has largely been abandoned. Recently, however, with the re-emergence of color-based stereo and volumetric techniques, color imaging for PIV has again become relevant. In this work we explore the potential...conference paper 2013
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Kähler, C.J. (author), Cierpka, C. (author), Scharnowski, S. (author), Manhart, M. (author), Sciacchitano, A. (author), Lynch, K. (author), Scarano, F. (author), Wieneke, B. (author), Willert, C. (author), Jeon, Y. J. (author), Chatellier, L. (author), Augereau, L. (author), Tremblais, B. (author), David, L. (author)Classical Particle Image Velocimetry (PIV) uses two representations of the particle image distribution to determine the displacement of the particle image pattern by spatial cross-correlation. The accuracy and the robustness are however limited by the fact that only two representations at t and t +?t are present. Thus, only a first order...conference paper 2013
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Mishra, A. (author), Kulkarni, V. (author), Khor, J.W. (author), Wereley, S. (author)Objects lying on the liquid-gas interface create a free surface deformation due to surface tension. In previous studies, it has been shown that capillary/ meniscus interaction between these objects leads to self assembly. This phenomenon is also known as the Cheerios effect. Surface tension driven self assembly offers an attractive route for...conference paper 2013
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Kauffmann, P. (author), Loire, S. (author), Mezic, I. (author), Meinhart, C. (author)Since late 1990s, micron-resolution particle image velocimetry (?PIV) has been widely developed to measure fluid flow velocities field in microchannels [1]. While 2D ?PIV method has been extensively investigated, accurate 3D ?PIV still remains challenging to implement since it usually requires specialized and expensive equipments (e.g. confocal...conference paper 2013
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Funatani, S. (author), Takeda, T. (author)This paper describes the principle of the 3D-3C PIV system which is based on expanded visualized area by deforming the shape of a laser light sheet into a W shape. When the shape of the light sheet is W-shape, it becomes possible to visualize parts of a field at various x, y and z positions simultaneously. Since velocity distribution with...conference paper 2013
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Abdelmassih, G. (author), Varela, S. (author), Vernet, A. (author), Pallares, J. (author)Particle Image Velocimetry (PIV) has been used to analyze the flow in an open cavity located on the bottom of a horizontal channel. Two different configurations have been considered. The first configuration corresponds to the isothermal flow and the second has the bottom wall of the cavity heated while the rest of the walls of the cavity and the...conference paper 2013
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Lynch, K. (author), Scarano, F. (author)A tomographic PIV system composed of a large number of cameras is used to experimentally investigate the relation between image particle density, number of cameras and the reconstruction quality. The large number of cameras allows to determine an asymptotic behavior for the object reconstruction over a wide range of values for the tracer...conference paper 2013
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Bardet, P.M. (author), André, M.A. (author), Neal, D.R. (author)Laser diagnostics for measuring velocity or acceleration are based either on transit-time or Doppler effect. Transit-time techniques rely on the displacement of tracers during a given amount of time. Tracers can be either particles (Particle Image Velocimetry, Particle Tracking Velocimetry) or molecules (Molecular Tagging Velocimetry). In these...conference paper 2013
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Mlecnik, E. (author), Kondratenko, I. (author), Haavik, T. (author)Single-family home renovations often show deficiencies in project management. There might be a market addressing house owners who would prefer integrated renovation services and clear responsibilities. Companies that would respond to these client’s needs would have a clear market potential, particularly for ambitious energyefficient home...report 2013
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Cafiero, G. (author), Ceglia, G. (author), Discetti, S. (author), Ianiro, S. (author), Astarita, T. (author), Cardone, G. (author)The jet flow past an abrupt expansion under some conditions switches intermittently between two states: quasi-axisymmetric expansion and gyroscopic-like precessing motion. In this work an experimental analysis is carried out by means of Tomographic Particle Image Velocimetry (Tomo-PIV).The self-excited flow precession generated by a 5:1...conference paper 2013