I am making an analyses of the fumes concentration in a painting cabinet used to spray paint F16´s. Does anyone know where I can find an IGES file of an F16? ..or can dxf-files be converted to IGES format !

Here you go

http://www.3dcontentcentral.com/part...t.aspx?id=3429

However, I've never been able to use the models from that site in a CFD analysis. Most of them are not created with a CAD package, but with 3D softwares. You will need to register a free account.