The wavelet-based vector multiresolution technique was applied to the postprocessing of PIV results for identifying the multiscale turbulent structures of a lobed jet. By analyzing the instantaneous streamlines and vorticity fields of various scales, we obtained important information on the multiscale flow structures. The large-scale vortices or coherent structures with a central scale of a = 1...

We present a holographic PIV system which extends the standard PIV analysis scheme of two velocity components (2D2C) to the third dimension and overcomes the disturbing background light in deep volume images reconstructed from particle holograms. In a light-in-flight holography (LiFH) setup the short coherence length of a modified laser source is used to suppress light from out-of-focus regions...

High Performance Computing (HPC) applications are mapped to a cluster of multi-core processors communicating using high speed interconnects. More computational power is harnessed with the addition of hardware accelerators such as Graphics Processing Unit (GPU) cards and Field Programmable Gate Arrays (FPGAs). Particle Image Velocimetry (PIV) is an embarrassingly parallel application that can be...

We analyze representative ill-posed scenarios of tomographic PIV with a focus on conditions for unique volume reconstruction. Based on sparse random seedings of a region of interest with small particles, the corresponding systems of linear projection equations are probabilistically analyzed in order to determine (i) the ability of unique reconstruction in terms of the imaging geometry and the c...

We introduce a novel class of algorithms for evaluating PIV image pairs. The mathematical basis is a continuous variational formulation for globally estimating the optical flow vector fields over the whole image. This class of approaches has been known in the field of image processing and computer vision for more than two decades but apparently has not been applied to PIV image pairs so far. We...

A simultaneous measurement technique for the velocity distributions and scholar distributions, e.g., pressure, temperature, and so on, has been proposed. It visualized the spatial distribution using the multi-purpose particles, which has been coated with pressure-sensitive dye. The proposed particle technique, called the PSParticle method, is a hybrid system combining the technologies of pressu...

Peripheral intravenous catheters (PIVs) are mainstays of modern medical intervention, placed in >25 million US patients annually1 and in at least 44% of pediatric inpatients.2 Although PIVs are often essential for delivering medications, hydration, and nutrition to ill children, they are not without consequence or cost. In this issue of Hospital Pediatrics, Goff et al detail specifi c PIV inser...

We present the Protected-IV construction (PIV) a simple, modular method for building variable-input-length tweakable ciphers. At our level of abstraction, many interesting design opportunities surface. For example, an obvious pathway to building beyond birthday-bound secure tweakable ciphers with performance competitive with existing birthday-bound-limited constructions. As part of our design s...

The use of Computational Fluid Dynamics (CFD) for the design modern hydraulic turbines has increased and matured significantly in last decades. More recently, CFD is also used to understand how safely widen turbine operating ranges, avoid hazardous conditions during transient operation. accuracy such results relies on validation with experimental data which contains numerous sources uncertainti...

This article provides data on the static behavior of reinforced concrete at room and low temperature including, strength, ductility, and crack widths of the reinforced concrete. The experimental data on the application of digital image correlation (DIC) or particle image velocimetry (PIV) in measuring crack widths and the accuracy and precision of DIC/PIV method with temperature variations when...