Active control of laminar stability by feedback control strategy

A new active way to control laminar stability through feedback control stra tegy is presented in this paper. By applying the expansion method, the smal l perturbation parameter, which is related to uniform boundary heat flux, i s well separated out from the problem we studied. As a result, the heat flu x independent coefficients, which reflect the temperature dependent viscosi ty effects, can be obtained. It is shown that this feedback laminar flow co ntrol strategy can considerably dominate the development of fluctuations pr ovided that the phase of heating or cooling and the control position are pr operly chosen. (C) 2000 Elsevier Science Ltd. All rights reserved.