This study presents a high spatial resolution hybrid particle image velocimetry/particle tracking velocimetry (PIV/PTV) methodology for investigating high Reynolds number turbulent channel flow. Utilising two 103-megapixel cameras, the experiment captures the entire channel height with a spatial resolution ...
The spatial resolution was about 6 wall units/vector in the SE cases and increased to 9 and 23 wall units/vector in the LE cases. The straddle time within the image pairs was selected to keep the maximum particle offset around 14„16 pixels in the image plane. The relative error of ...
Recently it has been demonstrated that high resolution transthoracic echocardiography (HRTTE) is able to detect differences in the wall thickness of the left anterior descending coronary artery (LAD) between patients with coronary artery disease (CAD) and normal volunteers. We sought to validate this...
promising diagnostic tool for the evaluation of the small bowel and offers a number of distinct advantages over its projectional and cross-sectional alternatives, including absence of associated ionizing radiation exposure, multiplanar imaging capabilities, superb contrast and temporal resolution and facilit...
The vorticity contour levels start at 1 s)1 (thickest line), and are in increments of 1 s)1, and the maximum values of vorticity are: b 8.48 s)1, d 4.13 s)1, f 3.68 s)1 the resolution of the data, so it is very useful to obtain the details of the ¯ow from the ...
We used the NED DEM (10 m resolution) to measure channel morphology and geologic maps to account for lithologic variations and faults. Bedrock channel profile analyses from several uplifted footwalls (Pine Forest Range, Santa Rosa Range, Jackson Mountains) reveal patterns in concavity (θ) and...
The low image resolution in the light axis (r-axis) made SF observation difficult in z-θ plane images. To directly observe the SF in the r-θ plane, we opted for circumferential stretching of a ring specimen instead of intraluminal pressurization. We investigated the effects of circumferential...
Recently it has been demonstrated that high resolution transthoracic echocardiography (HRTTE) is able to detect differences in the wall thickness of the left anterior descending coronary artery (LAD)...
spatial resolutionwall-turbulenceThe spatial averaging effects due to a cross-wire probe on the measured turbulence statistics in a wall-bounded flow are investigated using a combined approach of direct numerical simulation data, theoretical methods and experiments. In particular, the wire length (l),...
Moreover, since turbulence becomes more intermittent at higher Reynolds numbers, the flow will be less well-resolved at the higher Reynolds number if the same grid resolution in terms of the viscous units is employed. Specifically, our estimate shows that a grid that resolves 90% of the ...