期刊
JOURNAL OF FLUID MECHANICS
卷 481, 期 -, 页码 67-76出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022112003003768
关键词
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We search channel flow for unsteady solutions for different Reynolds numbers and configurations by extending a shooting method which was previously used to obtain a travelling-wave solution. A general initial condition is considered. A periodic-like solution to the incompressible Navier-Stokes equations in a minimal flow unit is found. One cycle of the solution consists of two typical intervals: a single-streak period and a double-streak period. The solution seems to be periodic; however, it cannot be distinguished from a heteroclinic cycle which consists of two heteroclinic orbits connecting two single-streak solutions, because the solution is tracked only for one and half periods.
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