Stability of flow on a permeable layer

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  • 浸透層上の流れの安定性(河川・湖沼・地下水の流れ(1),一般講演)

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Abstract

A linear stability analysis is performed with the use of the Reynolds averaged Navier-Stokes equations and Darcy's law in order to investigate the instability of flow on permeable river beds. The spectral collocation method incorporated with the Chebyshev polynomials is employed in order to perform numerical solution of perturbed equations. It is found that, in the case of permeable beds, flow becomes unstable in the range of small Froude numbers where flow is stable in the case of impermeable beds.

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