Performance of several viscothermal acoustic finite elements

Share/Save/Bookmark

Kampinga, W.R. and Wijnant, Y.H. and Boer, A. de (2010) Performance of several viscothermal acoustic finite elements. Acta Acustica United with Acustica, 96 (1). 115 - 124. ISSN 1610-1928

[img] PDF
Restricted to UT campus only
: Request a copy
222kB
Abstract:Viscothermal acoustics can be described by the linearized Navier Stokes equations. Besides inertia and compressibility, these equations take the heat conductivity and the viscosity of the medium (air) into account. These 'viscothermal' effects are significant in, for example, miniature acoustic transducers and MEMS devices. A finite element for viscothermal acoustics, which can be used to model such devices, is presented. The particular set of equations used in the model of viscothermal acoustics leads to a complex symmetric finite element system matrix. Several different FEM discretizations are studied on a 2D thin gap problem. These discretizations are known, in the context of the Stokes equation, as the Taylor Hood quadrilateral and triangle elements, the Crouzeix Raviart element and the MINI element. All elements are implemented in the FEM software COMSOL. The elements with quadratic velocity and temperature shape functions show the best orders of convergence.
Item Type:Article
Copyright:© 2010 Ingenta
Faculty:
Engineering Technology (CTW)
Research Chair:
Research Group:
Link to this item:http://purl.utwente.nl/publications/70151
Official URL:http://dx.doi.org/10.3813/AAA.918262
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 265331