Wave resistance of a hovercraft moving in water with nonrigid bottom

M. Cohen, T. Miloh, G. Zilman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Surface waves generated by a moving ship in water of finite depth are affected by the rheological properties of the movable bottom. The aim of this work is to evaluate the wave resistance exerted on a hovercraft modeled as a two-dimensional pressure distribution moving on the free surface of water with nonrigid bottom. Analysis of three-dimensional flows in two-fluid layers of finite depths is performed by assuming an inviscid upper layer (water) and a viscous lower layer (nonrigid bottom). Numerical calculations show that the maximum wave resistance occurs in the vicinity of the critical Froude number F=1. This maximum value decreases as the muddy bottom becomes less rigid.

Original languageEnglish
Pages (from-to)1461-1478
Number of pages18
JournalOcean Engineering
Issue number11
StatePublished - 15 Jun 2001


  • Muddy bottom
  • Viscous flows
  • Wave resistance


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