scalar gradient

scalar gradient

[′skā·lər ′grā·dē·ənt]
(mathematics)
The gradient of a function.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The pdfs for c < 0.5 are not shown in Figures 4(a) and 4(b), as [N.sub.c] assumes small values in the preheat zone of the flame due to small magnitude of scalar gradient [nabla]c.
Thus, the isoscalar lines come close to each other under the action of decreasing [a.sub.n], which leads to increase in the magnitude of scalar gradient [[nabla].sub.c].
Swaminathan, "The scalar gradient alignment statistics of flame kernels and its modelling implications for turbulent premixed combustion," Flow, Turbulence and Combustion, vol.
Swaminathan, "Effects of Lewis number on reactive scalar gradient alignment with local strain rate in turbulent premixed flames," Proceedings of the Combustion Institute, vol.
As watershed requires a scalar gradient (i.e., one channel), the channels gradients are summed with a weight equal to one.