Perturbation
Perturbation : Any departure introduced into an assumed steady state of a system. The magnitude of the departure is often assumed to be small so that product terms in the dependent variables may be neglected; the term "perturbation" is therefore sometimes used as synonymous with "small perturbation." The perturbation may be concentrated at a point or in a finite volume of space; or it may be a wave (sine or cosine function); or in the case of a rotating system, it may be symmetric about the axis of rotation; or it may be a displacement by the parcel method. The mathematical work in an instabdity problem may be facilitated by perturbation technique, whether or not the equations are linearized
No records Found