scholarly journals Effect of Approximate Tensor Representations for High-order Turbulence Correlations in Complex Axi-symmetric Flow Fields

2021 ◽  
Author(s):  
Mohammed Z. Afsar ◽  
Vasily Gryazev ◽  
Anton P. Markesteijn ◽  
Sergey A. Karabasov
Keyword(s):  
Flow Fields ◽  
High Order ◽  
Symmetric Flow ◽  
Tensor Representations

Planar velocity measurement in symmetric flow fields with laser-induced iodine fluorescence

1994 ◽  
Vol 19 (3) ◽  
pp. 216 ◽  
Author(s):  
Steven D. Hollo ◽  
Roy J. Hartfield ◽  
James C. McDaniel
Keyword(s):  
Velocity Measurement ◽  
Flow Fields ◽  
Symmetric Flow ◽  
Planar Velocity

Design of Vortex Fluid Amplifiers With Asymmetrical Flow Fields

1972 ◽  
Vol 94 (1) ◽  
pp. 82-84 ◽  
Author(s):  
T. J. Lawley ◽  
D. C. Price
Keyword(s):  
Large Scale ◽  
Modular Design ◽  
Design Method ◽  
Flow Fields ◽  
Control Area ◽  
Geometric Parameters ◽  
Symmetric Flow ◽  
Chamber Length ◽  
Production Type ◽  
And Control

Variation of geometric parameters, including supply area, control area, chamber length, and outlet diameter, of a large scale, modular design vortex fluid amplifier with single supply and control jets, has confirmed and extended a previously published design method, developed for vortex amplifiers with symmetric flow fields. This allows application of the method to devices which are more representative of practical, production type components.

Determination of the Burgers vector of a dislocation in a Fe-Mn alloy by weak-beam image in HVEM

1978 ◽  
Vol 36 (1) ◽  
pp. 330-331
Author(s):  
Y. Ishida ◽  
H. Ishida ◽  
K. Kohra ◽  
H. Ichinose
Keyword(s):  
High Order ◽  
Simulation Technique ◽  
The Other ◽  
Image Simulation ◽  
Diffraction Vector ◽  
Burgers Vector ◽  
Weak Beam ◽  
Beam Image ◽  
Edge Component

IntroductionA simple and accurate technique to determine the Burgers vector of a dislocation has become feasible with the advent of HVEM. The conventional image vanishing technique(1) using Bragg conditions with the diffraction vector perpendicular to the Burgers vector suffers from various drawbacks; The dislocation image appears even when the g.b = 0 criterion is satisfied, if the edge component of the dislocation is large. On the other hand, the image disappears for certain high order diffractions even when g.b ≠ 0. Furthermore, the determination of the magnitude of the Burgers vector is not easy with the criterion. Recent image simulation technique is free from the ambiguities but require too many parameters for the computation. The weak-beam “fringe counting” technique investigated in the present study is immune from the problems. Even the magnitude of the Burgers vector is determined from the number of the terminating thickness fringes at the exit of the dislocation in wedge shaped foil surfaces.

The usefulness of high index low symmetry zone axes for holz line analysis

1987 ◽  
Vol 45 ◽  
pp. 384-385
Author(s):  
C. M. Sung ◽  
D. B. Williams
Keyword(s):  
Lattice Parameter ◽  
High Order ◽  
Zone Axis ◽  
High Index ◽  
High Symmetry ◽  
Second Phases ◽  
Line Patterns ◽  
Low Symmetry ◽  
Line Analysis

Researchers have tended to use high symmetry zone axes (e.g. <111> <114>) for High Order Laue Zone (HOLZ) line analysis since Jones et al reported the origin of HOLZ lines and described some of their applications. But it is not always easy to find HOLZ lines from a specific high symmetry zone axis during microscope operation, especially from second phases on a scale of tens of nanometers. Therefore it would be very convenient if we can use HOLZ lines from low symmetry zone axes and simulate these patterns in order to measure lattice parameter changes through HOLZ line shifts. HOLZ patterns of high index low symmetry zone axes are shown in Fig. 1, which were obtained from pure Al at -186°C using a double tilt cooling holder. Their corresponding simulated HOLZ line patterns are shown along with ten other low symmetry orientations in Fig. 2. The simulations were based upon kinematical diffraction conditions.

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