Adel Stitou

Office National d'Études et de Recherches Aérospatiales

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Co-Authors

M. L. Riethmuller

Von Karman Institute for Fluid Dynamics

Pierre Millan

Hospital Universitario Virgen de las Nieves

Gábor Dezső-Weidinger

Von Karman Institute for Fluid Dynamics

V́

Vale ́rie Me ́nard

Office National d'Études et de Recherches Aérospatiales

Jeroen van Beeck

Von Karman Institute for Fluid Dynamics

Jean-Marie Buchlin

Von Karman Institute for Fluid Dynamics

EÖ

Emi̇n Özsoy

Middle East Technical University

Raf Theunissen

Flemish Institute for Technological Research

Ś

Ste ́phane Le Masson

Orange (France)

David No ̈rtersha ̈user

Orange (France)

Cooperative Institutions

Von Karman Institute for Fluid Dynamics

Office National d'Études et de Recherches Aérospatiales

Orange (France)

Hospital Universitario Virgen de las Nieves

Université de Toulouse

Institut Superieur de l'Aeronautique et de l'Espace (ISAE-SUPAERO)

Federal Emergency Management Agency

Tata Steel (Netherlands)

Vrije Universiteit Brussel

Eindhoven University of Technology

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Velocity and Temperature Fields Measurement of Natural Convection Flow Using Thermochromic Liquid Crystals

Vale ́rie Me ́nard Adel Stitou Ste ́phane Le Masson David No ̈rtersha ̈user Pierre Millan

Based on a particular property of some liquid crystal to reflect a specific wavelength for a specific temperature, Particle Image Velocimetry and Thermometry (PIVT) is a method allowing to measure simultaneously velocity and temperature fields. In a first part, this study discusses PIVT calibration methods and especially the effect of liquid crystal particle deposition on hue and intensity response. An experimental set-up is designed and the results confirm the high variations of intensity response with time and the need to use a simple relationship between hue and temperature. In a second place, these results are used to apply PIVT to an unsteady natural convection flow in a cavity containing an internal heat source.

Thermochromism

Intensity

Velocimetry

Hue

Temperature Gradient

10.1115/ht2005-72153

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Measurement of the turbulent mass flux with PTV in a street canyon

Journal of Wind Engineering and Industrial Aerodynamics (2003)

Gábor Dezső-Weidinger Adel Stitou Jeroen van Beeck M. L. Riethmuller

Turbulent diffusion

Mass flux

10.1016/s0167-6105(03)00054-0

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Citations (29)

Vortex characteristics in laminar cavity flow at very low Mach number

Experiments in Fluids (2004)

Emi̇n Özsoy Patrick Rambaud Adel Stitou M. L. Riethmuller

Vortex shedding

Water tunnel

10.1007/s00348-004-0845-8

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Citations (32)

Advances in Hybrid PIV-PTV Technique and Application to Vortical Flows

Springer eBooks (2004)

Adel Stitou Raf Theunissen M. L. Riethmuller

Robustness

10.1007/978-3-642-18795-7_10

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Citations (2)

Development of a hybrid PIV-PTV super resolution method and application to separated flows

Adel Stitou Jean-Marie Buchlin

Source

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Measurement Science and Technology (2001)

Adel Stitou M. L. Riethmuller

This work constitutes the study and the development of an integrated PIV-PTV method, which combines the advantages of the two approaches: the robustness of PIV and the spatial resolution of PTV. The technique is a hybrid algorithm that starts by statistical evaluation of a tracer's displacement (PIV analysis) and further refines the resolution of measurement with the tracking of individual particles (PTV). This strategy is referred to as the super resolution analysis. This work presents and critically discusses the principles of this processing. Key points of the method are emphasized. This work focuses mainly on the particle extraction and on the particle tracking steps aiming at investigating monophasic flows. Efforts to face imaging conditions for highly seeded flows and to improve the robustness of the technique are made. Tests on real images are presented and discussed.

Robustness

10.1088/0957-0233/12/9/304

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Citations (79)