Numerical Simulations of Compliant Material Response to Turbulent Flow. Revision 1,
Abstract
Homogeneous and internally structured material coatings are studied numerically as candidates for drag and turbulence generated noise reduction on submersible hulls. Dynamic motions of complaint surfaces may conceptually interrupt random turbulent motions, reducing the turbulent interface stresses and absorbing turbulent energy, and consequently reducing the turbulence at the flow/coating interface. Time dependent, two and three dimensional Monte-Carlo turbulent pressure field models, and interactive Navier-Stokes pseudo-spectral methods are used to represent the unsteady flow, while finite element methods are applied to represent a variety of homogeneous, layered, and internally structured material coatings. The influence of added mass and in-depth overburden on the material response in ocean water is discussed. Promising compliant material coatings include sandwiches of soft, homogeneous layers between thin, stiffer elastic materials and internally structured coatings combining streamwise ribs, and spanwise voids separated by stiff elastic supporters imbedded in soft yielding viscoelastic layers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1984
- Accession Number
- ADA145801
Entities
People
- A. C. Buckingham
- M. S. Hall
- R. C. Chun
Organizations
- Lawrence Livermore National Laboratory