Approximation of the Integral Boundary Layer Equation by the Kuramoto--Sivashinsky Equation
Approximation of the Integral Boundary Layer Equation by the Kuramoto--Sivashinsky Equation
复制标题
用Kuramoto--Sivashinsky方程逼近积分边界层方程
DOI:
--
复制
发表时间:
2003
影响因子:
1.9
通讯作者:
H. Uecker
中科院分区:
文献类型:
--
作者:
H. Uecker
In suitable parameter regimes the integral boundary layer equation (IBLe) can be formally derived as a long wave approximation for the flow of a viscous incompressible fluid down an inclined plane. For very long waves with small amplitude, the IBLe can be further reduced to the Kuramoto--Sivashinsky equation (KSe). Here we justify this reduction of the IBLe to the KSe. Using energy estimates, we show that solutions of the KSe approximate solutions of the IBLe over sufficiently long time scales. This is a step towards understanding the approximation properties of the KSe for the full Navier--Stokes system describing the inclined film flow.