Numerical simulations of complaint material response to turbulent flow

Conference · Mon Jul 01 04:00:00 EDT 1985 · AIAA J.; (United States)

OSTI ID:5225507

Buckingham, A C; Hall, M S; Chun, R C

Homogeneous and internally structured material coatings are studied numerically as candidates for drag- and turbulence-generated noise reduction on submersible hulls. Dynamic motions of compliant 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 pseudospectral 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. 18 references, 10 figures.

• Research Organization: Lawrence Livermore National Lab., CA
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5225507
• Conference Information: Journal Name: AIAA J.; (United States) Journal Volume: 23:7
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
420500* -- Engineering-- Materials Testing
COATINGS
COMPUTERIZED SIMULATION
DIFFERENTIAL EQUATIONS
EQUATIONS
FINITE ELEMENT METHOD
FLOW STRESS
FLUID FLOW
HYDROGEN COMPOUNDS
INTERFACES
MONTE CARLO METHOD
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
OXYGEN COMPOUNDS
PARTIAL DIFFERENTIAL EQUATIONS
SEAWATER
SIMULATION
STRESSES
SURFACES
TESTING
TURBULENT FLOW
WATER