Aspect ratio effect

Figure 13.7 Aspect ratio effects on the combustion of a propane-nitrogen jet with oxygen-nitrogen surroundings. Instantaneous visualizations temperature distributions superimposed on vorticity isosurfaces [34] (a) AR = 1 (6) AR = 2...

Grinstein, F.F. 1997. Entrainment, axis-switching, and aspect-ratio effects in rectangular jets. AIAA Paper No. 97-1875. 

Hence, it is supplanted by the filler density (p) and its specific surface area (Q to address the shape factors. This can successfully represent the aspect ratio effects because changes in aspect ratio are reflected in the ratio of particle surface area to particle volume, i.e., density x surface area/gram. 

Combination Factor A Factor 6 Factor C Aspect Ratio Effect Significance 95%... 

Hatfield, D. W.. and D. K. Edwards Edge and Aspect Ratio Effects on Natural Convection from the Horizontal Heated Plate Facing Downwards, Ini. J. Heat Mass Transfer, vol. 24, p. 1019, 1981. 

The aspect ratio effect is seen in Fig. 29. Given a localized source of species (e.g. radicals), the spatial distribution of these species at steady state will depend on the reactor aspect ratio. Low aspect ratio reactors (tall, small radius) yield a distribution that peaks on axis, while large aspect ratio systems (short, large radius) yield a dis-... 

Fig. 3. Sample aspect ratio effect on calculated low modulus (reduced by SE-30) moduli from RMS characterization.

This work seemed to show that the Kramer (8) force-strain relationship was applicable for a viscoelastic fluid in low amplitude oscillating squeeze flow. The effects of frequency, modulus and strain amplitude were accounted for quite nicely. The sample thickness (aspect ratio) effect was not totally accounted for. 

Li H, Olsen MG (2006) Aspect ratio effects on turbulent and transitional flow in rectangular microchannels as measured with microPIV. J Fluids Eng 128 305-315... 

Fig. 23.10 Aspect ratio effect on settlement-rotation behavior for Type B and Type C structures located on dense sand...

D., Su, A., and Chi, P. (2009) Channel aspect ratio effect for serpentine proton exchange membrane fuel cell role of sub-rib convection. J. Power Sources, 193 (2), 684-690. 

To date, few reports are available on the effect of the powders properties such as particle size, distribution, density and morphology on the densification behavior and the mechanical and microstructural characteristics of those powder compacts [33, 125-128]. In order to study the aspect ratio effect on densification, high-aspect ratio nanopowder or rod-shaped particles (aspect ratio 7.2) and low-aspect ratio or spherical nanopowders (aspect ratio 1.3 0.3) were synthesized using an emulsion technique with different parameters [103]. The specific average surface areas of the as-synthesized spherical and rod-shaped HA powders were 39and 29m g" ,... 

Table 8. Effect of Platelet Size and Aspect Ratio on Toughness ...

Volume of vessel (free volume V) Shape of vessel (area and aspect ratio) Type of dust cloud distribution (ISO method/pneumatic-loading method) Dust explosihility characteristics Maximum explosion overpressure P ax Maximum explosion constant K ax Minimum ignition temperature MIT Type of explosion suppressant and its suppression efficiency Type of HRD suppressors number and free volume of HRD suppressors and the outlet diameter and valve opening time Suppressant charge and propelling agent pressure Fittings elbow and/or stub pipe and type of nozzle Type of explosion detector(s) dynamic or threshold pressure, UV or IR radiation, effective system activation overpressure Hardware deployment location of HRD suppressor(s) on vessel... 

The effect of tube radius and coil aspect ratio on the onset of radial mixing in coiled tubes was investigated using the above equations. In Table 5, the dimensions of the coiled tubes examined are given and the curves relating (H) and (u) in Figure 8. 

Effect of scaling-up volume at constant aspect ratio... 

McRee, D. I., and H. L. Moses. 1967. The effect of aspect ratio and offset on nozzle flow and jet reattachment. In Advances in Fluidics The 1967 Fluidics Symposium. ASME. 

In addition to chemical or physical properties, a fascinating aspect of fullerene related materials is their central empty space, where atoms, molecules or particles can be enclosed. The enclosed particles are then protected by the robust graphitic layers from chemical or mechanical effects. The very long cavities of CNTs have a special potential due to their high aspect ratio and they can be used as templates to fabricate elongated nanostructures. 

During a steady-state capillary flow, several shear-induced effects emerge on blend morphology [4-6]. It is, for instance, frequently observed that TLCP domains form a fibrillar structure. The higher the shear rate, the higher the aspect ratio of the TLCP fibrils [7]. It is even possible that fibers coalesce to form platelet or interlayers. 

The influence of aspect ratio of steel fibres on effective shielding may be illustrated... 

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