# flux density

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## flux density

1. (spectral flux density or, strictly, spectral power flux density) Symbol: S . A measure of the strength of the signal received from a discrete source of emission. The dimensions of flux density are energy per unit time per unit bandwidth per unit area. The unit is the jansky.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

## flux density

[′fləks ‚den·səd·ē]
(nucleonics)
(physics)
Any vector field whose flux is a significant physical quantity; examples are magnetic flux density, electric displacement, gravitational field, and the Poynting vector.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
For a 90[degrees] helix pitch angle, we observe from Figure 4(b) that the patterns of flux densities are very much similar to the case of 0[degrees] pitch (Figure 4(a)), except the fact that the magnitudes are slightly increased in this case, and the density characteristic exhibits more dissipating ripples.
The slot area in the stator can be maximized by optimizing tooth and yoke area so that the flux densities in these areas are kept just under the saturating limit of the core.
There are a few UCHII candidates within each of the three regions with a wide range of 100 [micro]m flux densities. Summing these up for each region, and assuming [S.sub.100 [micro]m]/[S.sub.2 cm] = 1000 gives 0.52,14.3, and 7.9 Jy for Perseus, S140 and S235, respectively.
According to the analyses of flux density, it can be calculated that the max flux densities of three discrete filter inductors are 0.33 T, the max flux densities of three middle limbs of integrated filter inductors with five limbs are 0.33 T and that of the other two limbs are zero, and the max flux densities of middle limb of integrated filter inductors with three limbs are 0.17 T and that of the other two limbs are 0.33 T.
Also, the maximum and average airgap flux densities obtained from the FEM and sizing analysis agree well.
The magnetic flux density was altered by varying the amount of the electric current from 0, 10, 12, 14 to 16 A, these values corresponding to the magnetic flux densities of 0, 30, 37, 44, and 51 mT, respectively.
Three critical sections, which are shown in Figure 4 as numbers 3 through 5, were chosen and their corresponding flux densities were compared to the saturation level of the material from which the section is made.
The minimum value of the stator core axial length also may be calculated from the flux densities in the air gap [B.sub.g] and in the stator core Bsc and the geometric ratio [lambda] = R/[R.sub.o] as,
Further, flux densities due to the E[H.sub.01] and E[H.sub.11] modes decrease with the increase in radial distance, whereas that due to the E[H.sub.21] mode exhibits a minor increase only.
In the case where the air gap is large relative to the pole-width, flux fringing is responsible for the high flux densities found outside the area in-between the pole faces.

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