Modelling for a 3D body with two geometries and two materials different for a steady state heat transfer FEM problem.

Hi. I'm studying a steady state heat transfer FEM problem for a 3D body built with two geometries and two materials different. I'd like to know if is possible to create above 3D model by union of a cube ( of wood material ) with a hollow cylinder ( of steel material ): you can immagine that the center of gravity of cube coincides with the center of gravity of hollow cylinder. Thanks.

[Amal George M]

Hi Simone,

The required geometry can be created using ' geometryFromMesh ' or the same can be imported from a 'STL' file. Each geometry has to be specified as a separate cell. Thermal properties of each geometry can be assigned to the corresponding cell. Here is an example involving heat transfer in multiple spheres.

[Simone Galante]

Hi George, Thank you for your suggestions. I tried more times to import a .stl file for a simple 3d model built by two continues boxes having one face and four edges common, but when I launch the importGeometry(thermalmodel,'file.stl') command, I get the following message: "Error using pde.DiscreteGeometry Failed to create geometry. The stl file is invalid, more than two facets share an edge." It would seem to be not possible to have two or more edge common.