Exact Solution on Unsteady Couette Flow of Generalized Maxwell Fluid with Fractional Derivative
首发时间:2005-09-28
Abstract:In this paper the unsteady Couette flow of a generalized Maxwell fluid with fractional derivative (GMF) is studied. The exact solution is obtained with the help of integral transforms (Laplace transform and Weber transform) and generalized Mittag-Leffler function. It was shown that the distribution and establishment of the velocity is governed by two non-dimensional parameters , b and fractional derivative of the model. The result of classical (Newtonian fluid) Couette flow can be contained as a special case of the result given by this paper, and the decaying of unsteady part of GMF displays power law behavior, which has scale invariance.
keywords: unsteady Couette flow generalized Maxwell fluid fractional calculus exact solution
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广义Maxwell流体非定常Couette流动的精确解
摘要:文章首先提出一个带分数阶导数的Maxwell模型.借助于积分变换(Laplce变换和Weber变换)和Mittag-Leffler函数,给出了模型在非定常Couette流动的精确解.一些经典的Couette流动的结果可以做为本文的特例出现.文章的最后又对得到的精确解进行分析讨论,指出精确解中的非定常部分是幂律衰减的,具有尺度不变性.
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