From: Jos van Riswick Subject: TECH: FINITE ELEMENT FREEWARE Date: Wed, 10 Apr 1996 10:21:43 +0200 Message-ID: <316B6F97.500F9F30@mbfys.kun.nl> Organization: KUN Medical-/Biophysics From: Jos van Riswick I'm looking for software (freeware) that will help me calculate scattering of acoustical waves by a given complex geometry. I want to approximate time dependent pressure distributions arising say from a plain sound wave incident on a coffee cup. It'll have to be some kind of PDE solver which enabels one to feed it with a grid on which the 3d wave equation with positon-dependent phase velocity: 1/v(r)\nabla^2 u = d^2 u/dt^2 is sol- ved. Also certain boundary conditions will have to be specified. For instance: if you want to simulate an infinitly large medium (open air),the mesh points on the boundery of the grid must sat- isfy a PDE wich encorporates them being coupeled to a mached impendance. Also some graphical interface for visualisation of the result would be useful. Hope somebody out there knows something, I welcom all useful links or tips: mail me. thanks and greetings Jos van Riswick J.G.A. van Riswick, Telephone: 024 3557848 Schepenenstraat 55, E-mail: josvanr@mbfys.kun.nl 6525 XH, Nijmegen. (josvanr@sci.kun.nl) (The Netherlands)