Output details

A comparison of two wave element methods for the Helmholtz problem

Significance of output:

This is one of a sequence of articles by Astley, Gamallo and others directed at developing new computational tools for aircraft noise prediction. Numerical models for wave problems based on polynomial interpolation encounter unique difficulties at high frequencies (short wavelengths). They require many nodes per wavelength, leading to very large problem sizes. Special, non-polynomial interpolation functions offer a radical new alternative. Two methods are presented; the Partition of Unity Method developed by Astley and Gamallo within the Rolls-Royce UTC in Gas turbine Noise for application to aircraft noise prediction, and the Ultra-weak variational formulation developed by Huttunen, for general acoustics.