2010
DOI: 10.1007/s00348-010-1011-0
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Lagrangian and Eulerian pressure field evaluation of rod-airfoil flow from time-resolved tomographic PIV

Abstract: This work investigates the rod-airfoil air flow by time-resolved Tomographic Particle Image Velocimetry (TR-TOMO PIV) in thin-light volume configuration. Experiments are performed at the region close to the leading edge of a NACA0012 airfoil embedded in the von Kármán wake of a cylindrical rod. The 3D velocity field measured at 5 kHz is used to evaluate the instantaneous planar pressure field by integration of the pressure gradient field. The experimental data are treated with a discretized model based on mult… Show more

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Cited by 120 publications
(80 citation statements)
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“…Liu & Katz (2006) applied a four-exposure PIV system to evaluate the material derivative using the Lagrangian method followed by an omni-directional algorithm for the integration of the pressure gradient. Violato, Moore & Scarano (2011) extended the Lagrangian evaluation of the material derivative to three-dimensional particle trajectories using tomo-PIV. Charonko et al (2010) assessed the effect of different factors such as the integration method, grid resolution and sampling rate on the evaluation of the pressure field.…”
Section: Introductionmentioning
confidence: 99%
“…Liu & Katz (2006) applied a four-exposure PIV system to evaluate the material derivative using the Lagrangian method followed by an omni-directional algorithm for the integration of the pressure gradient. Violato, Moore & Scarano (2011) extended the Lagrangian evaluation of the material derivative to three-dimensional particle trajectories using tomo-PIV. Charonko et al (2010) assessed the effect of different factors such as the integration method, grid resolution and sampling rate on the evaluation of the pressure field.…”
Section: Introductionmentioning
confidence: 99%
“…From top to bottom: without applying the prior knowledge of divergencefree velocity fields through the solenoidal filter and using the Eulerian approach; without the prior knowledge using the Lagrangian approach; including the solenoidal prior and using the Eulerian approach; including the solenoidal prior and using the Lagrangian approach. From the figure, we can already deduce the observations made by Violato et al (2011), namely that the Lagrangian approach results in more accurate pressure reconstruction than the Eulerian approach, and the observations made by Azijli and Dwight (2015) that using the solenoidal prior improves the pressure reconstruction.…”
Section: Application To Experimental Datamentioning
confidence: 80%
“…We use both the Eulerian and the Lagrangian approaches to evaluate the material acceleration. According to Violato et al (2011), the Lagrangian approach should result in a more accurate reconstructed pressure field, since the boundary layer flow is a convection dominated type of flow. Whether this is indeed true should not only follow from comparison with the microphone measurement, but is also expected to be represented by a smaller uncertainty in the reconstructed pressure.…”
Section: Application To Experimental Datamentioning
confidence: 99%
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“…Although the contribution of three dimensionality and spatial/temporal resolution has not been explored in the context of force estimation, its influence has been characterized when extracting pressure, which too plays a significant role in the classical and DerivativeMoment Transformation formulations. In the work by Violato et al (2011), the relative contribution of these threedimensional terms was found to contribute to errors as high as 20% when estimating the material derivative and pressure gradient fields in an otherwise bulk two-dimensional flow. In general, there is a case to be made that the larger energy-containing scales will be most critical in estimating all terms in the force decomposition (in contrast to isotropic behaviour at smaller scales), but to date, no concrete evidence exists to support these assumptions.…”
Section: Practical Considerationsmentioning
confidence: 99%