Extension and application of the QUICKER scheme to a non-uniform rectangular grid system

1991 ◽  
Vol 7 (2) ◽  
pp. 111-122 ◽  
Author(s):  
Hyeong-Mo Koo ◽  
Seung O. Park
2000 ◽  
Vol 36 (10) ◽  
pp. 895 ◽  
Author(s):  
Zhengqing Yun ◽  
M.F. Iskander ◽  
Zhijun Zhang

1969 ◽  
Vol 34 (2) ◽  
pp. 180-182 ◽  
Author(s):  
Robert L. Edwards

AbstractThe Universal Transverse Mercator Grid is a rectangular grid system now used on all standard military maps. Archaeologists could use this system for site location, which would prove especially beneficial in areas where townships and range grids have not been drawn. The use of the series of numbers in the system would help eliminate duplication in state or regional site files.


1993 ◽  
Vol 252 ◽  
pp. 147-171 ◽  
Author(s):  
B. Yan ◽  
D. B. Ingham ◽  
B. R. Morton

The fluid flow induced by a cascade of circular cylinders which oscillates harmonically in an unbounded, incompressible, viscous fluid which is otherwise at rest is investigated both numerically and experimentally. Attention in this paper is mainly concentrated on the induced steady streaming flow which occurs when the ratio of the amplitude of the oscillation of the cascade to the size of the cylinder, ε, is very small. The leading-order flow is then governed by the steady Navier-Stokes equations. In order to solve these equations numerically we first generate numerically a grid system using the boundary element method and then use a finite-difference scheme on the newly generated rectangular grid system. Numerical results show that for small values of the streaming Reynolds number Rs there are four recirculating flows of equal strength around each circular cylinder of the cascade. At large values of Rs symmetry breaks down and numerical solutions are found for asymmetrical flows. Numerically, a critical value of Rs, Rso say, is identified such that the flow is symmetrical when Rs < Rso and asymmetrical when Rs > Rso and these results are in reasonable agreement with experimental results, which are also presented in this paper.


Author(s):  
T.-K. Lin ◽  
D. G. Lilley

Abstract The development, use and application of a three-dimensional fluid flow computer code is described. The code runs on microcomputers with effective 3-D perspective color graphic displays of the results. The present version of the code retains several simplifications, uses a uniform rectangular grid system, and runs on microcomputers, thus providing a powerful and economical software capability. Equations are solved for the fully 3-D problem, including pressure, three velocity components and species mass fractions. The simulation is a finite difference time-marching procedure using an explicit formulation of the conservation equations, followed at each step by an iteration updating pressures and velocities so as to impose the continuity requirement. The present paper documents the problem, describes briefly its simulation, theory and assumptions, and gives results showing an application of the code to co-flowing round jet mixing.


2007 ◽  
Vol 54 (4) ◽  
pp. 357-368 ◽  
Author(s):  
Changhoon Lee ◽  
Sung Bum Yoon

1987 ◽  
Vol 9 ◽  
pp. 237-237
Author(s):  
A.P.R. Cooper

The use of many display techniques for remotely sensed glaciological data requires the reduction of the data to a regularly spaced rectangular grid of values. Most remotely sensed data are not immediately suitable for display, because the area of interest is covered by more than one set of data on mutually incompatible grids (e.g. Landsat, AVHRR), or because the data are available as profiles along widely spaced ground tracks (e.g. radio echo-sounding, satellite altimetry). In addition, data may be sparsely and randomly scattered (e.g. surface elevations from TWERLE balloons).A variety of techniques is available to reduce data to a specified grid system. These include spatial averaging, interpolation from nearest neighbours, and surface-fitting techniques, notably polynomial fitting and bi-cubic splines. All of these are useful under differing circumstances.


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