DISPERSION ANALYSIS OF ACOUSTIC WAVES IN FLUID MEDIA DISCRETIZED BY ENERGY-ORTHOGONAL FINITE ELEMENTS

Abstract eng:
This paper studies the dispersion of acoustic waves in fluid media discretized by the finite element method. The element stiffness matrix is split into basic and higher order components which are respectively related to the mean and deviatoric components of the gradient of acoustic pressure. This decomposition is applied to the kinetic energy. The dispersion analysis yields a correlation between the higher order kinetic energy and the kinetic energy error. The use of this correlation as a reference to apply the higher order energy as an error indicator for the acoustic cavity modes computed by the finite element method is explored.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket