Flow-field mapping

Estimation of Mixing Efficiency by Flow-field Mapping... 

Figure Bl.14.10. Flow tlirough an KENICS mixer, (a) A schematic drawing of the KENICS mixer in which the slices selected for the experiment are marked. The arrows indicate the flow direction. Maps of the z-component of the velocity at position 1 and position 2 are displayed in (b) and (c), respectively, (d) and (e) Maps of the v- and the y-velocity component at position 1. The FOV (field of view) is 10 nnn. (From [31].)...

The Giesekus criterion for local flow character, defined as

extensional flow, 0 in simple shear flow and — 1 in solid body rotation [126]. The mapping of J> across the flow domain provides probably the best description of flow field homogeneity current calculations in that direction are being performed in the authors laboratory. 

The function P can be computed from either an analytical or a numerical representation of the flow field. In such a way, a 3-D convection problem is essentially reduced to a mapping between two-dimensional Poincare sections. In order to analyze the growth of interfacial area in a spatially periodic mixer, the initial distri-... 

Figure 6.4 Velocity vector field map of (a) low-soot case with dual injection and (6) high-soot case with dual injection, measured in a cold flow using PIV...

The most commonly utilized embedded sensor for temperature distribution mapping is the thermocouple. Wilkinson et al.130 developed a simple, in-situ, and noninvasive method of measuring the temperature distribution of a fuel cell with micro-thermocouples. In this study, thermocouples were located in the landing area of the flow field plates (in contact with the GDL of the MEA) of a fuel cell. The temperature data taken at different locations along the flow channel was then used to find each temperature slope, which in turn were related through mathematical equations to the local current density of each location. Thus, the current density distribution in the fuel cell was determined by simple temperature measurements. The results of this approach are discussed in more detail in Section... 

Mark the sample identifier on the Kraft paper bag using permanent ink marker. Mark the exact site location of the first and last subsamples on the field map by means of a small lines perpendicular to the stream flow. Complete the details of the field observation sheet. 

Previously, we had shown from elemental mapping that Cr diffuses from the gas flow field into the bond layer attached to the oxygen electrode. This Cr was seen to substitute for Co in the (La,Sr)Co03 bond material, reducing its conductivity, and the displaced Co reacted with more Cr to form CoCr204 crystals on the open surfaces of the bond layer situated under the gas flow fields (Mawdsley, 2009). 

Figure 7 SEM images and EDS maps of the interface between the interconnect and bond layer, which bonds the interconnect to the steam/hydrogen flow field...

The Art- beam was directed into the chemical laser cavity along the optical axis by a focusing optical train. The spot size in the cavity was a fraction of a millimeter, although tighter focusing could have been done, thus increasing the spatial resolution. The Art- beam could be translated in two dimensions, up and down the nozzle face, at a single position in the flow direction, and also downstream from the nozzle face. Hence, the flow field could be visually mapped out. 

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