radius ratio

radius ratio

[′rād·ē·əs ‚rā·shō]
(physical chemistry)
The ratio of the radius of a cation to the radius of an ion; relative ionic radii are pertinent to crystal lattice structure, particularly the determination of coordination number.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Hereinafter, [rho] = 2r/1 is the corner radius ratio of the square cross sections while the characteristic values of stress-strain curves collected in the database are defined as follows:
Table 5 uses a fixed radius ratio of 2 as well as fixed average radius values ([r.sub.a] = 0.365 [micro]m and [r.sub.b] = 0.730 [micro]m) for various wavelengths.
Tested hollow spheres present a diameter of [D.sub.ext] = 29.7 [+ or -] 0.1 mm, a radius ratio [R.sub.t] = 0.08, and a mass m = 6.30 [+ or -] 0.5 g.
When a planetary gear set is in star mode or its speed ratio is equal to zero, radius ratio [alpha] is equal to 1.
the number of balls (z), the curvature sum (R), the equivalent elastic modulus (E), the effective radius ratio ([gamma]), the friction force, and the load.
(5.) Grsvenor, T & Scott, R, 'Role of the axial length/ corneal radius ratio in determining the refractive state of the eye', Optometry and vision science, vol.
Analogously, the outer radius ratio was changed in the range [R.sub.ext] [member of] [2.07 mm, 2.62 mm] while keeping [R.sub.int] constant.
Gao, "Pore throat radius to coil gyration radius ratio as characteristic of adaptivity of polymer molecular mass to core permeability," Oilfield Chemistry, vol.
where [phi] is the amplitude ratio, Re is the Reynolds number, [delta] is the dimensionless wave number and Wi is the Weissenberg number, and [epsilon] is the radius ratio (the ratio between the radius of the inner tube and the radius of the outer).
[less than or equal to] [epsilon] [less than or equal to] 0.2 at the dimensionless radius ratio, [phi] [R.sub.1]/[R.sub.2], values of 0.8 and 0.9.
of test models having the wall thickness to cylinder radius ratio ([R.sub.c] / h) in the range of 4.5 to 33.33 and the head height to cylinder radius ratio ([R.sub.c] / H) were varied from 1.142 to 5.
Figure 3 indicates that the thickness of laminar flow layer has direct proportionality with both eccentricity and radius ratio.