Supported File Formats

COMSOL®


The COMSOL Model filetype, with the extension .mph, is the default file type containing the entire Model Tree. The file contains both binary and text data.The mesh and solution data are stored as binary data while all other information is stored as plain text.

The COMSOL Model filetype, with the extension .mph, is the default file type containing the entire Model Tree. The file contains both binary and text data.The mesh and solution data are stored as binary data while all other information is stored as plain text.

The COMSOL binary and text file types, with the extension .mphbin and .mphtxt respectively, contain either geometry objects or mesh objects which can be imported directly to the Geometry or Mesh branches in the Model Tree.

The Physics Builder file type with the extension .mphphb, contains one or more physics user interfaces that you can access from the Model Wizard.

File Format Extension Read Write
COMSOL Model .mph Oui Oui
Binary Data .mphbin Oui Oui
Text Data .mphtxt Oui Oui
Physics Builder .mphphb Oui Oui

MCAD


The CAD Import Module allows for import of a range of industry-standard CAD file types. Additional file types are available through the bidirectional functionality of the LiveLink products for CAD as well as with the File Import for Catia®V5 add-on.

The DXF (2D), VRML (3D), and STL (3D) file types are available for import with COMSOL Multiphysics® and don’t require any add-on products.

File Format Extension Read Write
AutoCAD® (3D only)1 .dwg Oui8 Oui8
Autodesk Inventor®2,3 .ipt, .iam Oui Oui8
Creo™ Parametric2 .prt, .asm Oui Oui8
Pro/ENGINEER® .prt, .asm Oui Oui8
Solid Edge® 4 .par, .asm Oui8 Oui8
SolidWorks®2,3 .sldprt, .sldasm Oui Oui8
SpaceClaim®5 .scdoc Oui8 Oui8
DXF (2D only) .dxf Oui Oui
Parasolid®2 .x_t, xmt_txt, .x_b, .xmt_bin Oui Oui
ACIS®2 .sat, .sab, .asat, .asab Oui Non
STEP2 .step, .stp Oui Non
IGES2 .iges, .igs Oui Non
CATIA® V53,6 .CATPart, .CATProduct Oui Non
VRML, v17 .vrml, .vrl Oui Non
STL7 .stl Oui Oui

1Requires LiveLink for AutoCAD®
2Requires one of the LiveLink products for AutoCAD®, PTC® Creo Parametric®, Inventor®, Pro/ENGINEER®, SolidWorks®, or SpaceClaim® CAD systems; or the CAD Import Module
3Import supported on Windows operating systems only.
4Requires LiveLink for Solid Edge®
5Requires LiveLink for SpaceClaim®
6Requires the CAD Import Module (or one of the LiveLink products for AutoCAD®, PTC® Creo Parametric®, Inventor®, Pro/ENGINEER®, SolidWorks®, or SpaceClaim®) and the File Import for CATIA®V5
7Limited functionality for a single geometric domain only
8From/To file via linked CAD package

ECAD


The ECAD Import Module allows for import of 2D layout files with automatic conversion to 3D CAD models. The Touchstone file type is used for exporting S-parameters, impedance, and admittance values from simultaneous port and frequency sweeps. The SPICE Circuit Netlist file type is converted at import to a series of lumped circuit element nodes under an Electrical Circuit node.

File Format Extension Read Write
NETEX-G1 .asc Oui Non
ODB++1 .zip, .tar, .tgz, .gz, .Z Oui Non
ODB++(X)1 .xml Oui Non
GDS II1 .gds Oui Non
Touchstone .s2p, .s3p, .s4p, ... Non Oui
SPICE Circuit Netlist2 .cir Oui Non

1Requires the ECAD Import Module
2Requires one of the AC/DC, RF, MEMS, or Plasma Modules

Material Databases


The Chemical Reaction Engineering Module can read CHEMKIN® files to simulate complex chemical reactions in the gas phase. The Plasma Module can read LXCAT files for sets of electron impact collision cross-sections.

File Format Extension Read Write
CHEMKIN® .dat, .txt, .inp3 Oui Non
CAPE-OPEN1 (direct connection) n/a n/a n/a
LXCAT file2 .lxcat, .txt Oui Non

1 Requires Chemical Reaction Engineering Module
2 Requires Plasma Module
3 Any file format is allowed, these are the most common extensions

Numerical Data, Images, and Movies


Results visualization can be exported to a number of common image file types, see the table below. Images can also be read and used as interpolation functions for physics modeling. Animations can be exported to one of the Animated GIF, Adobe® Flash®, and AVI file types.

File Format Extension Read Write
JPEG .jpg, .jpeg Oui Oui
PNG .png Oui Oui
BMP .bmp Oui Oui
.tif, .tiff .bmp Non Oui
GIF .gif Oui Oui
EPS (1D graphs) .eps Non Oui
Animated GIF .gif Non Oui
Adobe® Flash® .swf Non Oui
AVI1 .bmp Non Oui

1Available for Windows only

Interpolation Data Formats


The Grid, Sectionwise, and Spreadsheet file types can be read for defining Interpolation functions. The Sectionwise and Spreadsheet file types can furthermore be read and used for defining Interpolation curves and written for exporting Results. In addition, Tables can be copy-pasted on spreadsheet format.

Parameters and Variables can be imported and exported to the Plain text, Comma-separated values, or Data file types.

The Continuous and Discrete color table text file types are used for user-defined color tables for Results visualization.

Digital Elevation Model (DEM) files can be read and used as a Parametric Surface for defining a Geometry.

File Format Extension Read Write
Copy and paste spreadsheet format n/a Oui Oui
Excel® spreadsheet1 .xlsx Oui Oui
Table .txt, .csv, .dat Oui Oui
Grid .txt Oui Oui
Sectionwise .txt, .csv, .dat Oui Oui
Spreadsheet .txt, .csv, .dat Oui Oui
Parameters .txt, .csv, .dat Oui Oui
Variables .txt, .csv, .dat Oui Oui
Continuous and Discrete color table .txt Oui Non
DEM .dem Oui Non

1Requires LiveLink for Excel®, available for Windows® only

Mesh


The NASTRAN® Bulk Data file types are used to import a volumetric mesh. The VRML and STL file types are used to import a triangular surface mesh, and cannot be used for creating a volumetric mesh. If imported as a Geometry, then VRML and STL files can be used as a basis for creating a volumetric mesh for a single geometric domain.

File Format Extension Read Write
NASTRAN® Bulk Data .nas, .bdf, .nastran, .dat Oui Oui
VRML, v1 .vrml, .wrl Oui Non
STL .stl Oui Oui

Programming Languages


Model Java® files are editable script files, with the extension .java, that contain sequences of COMSOL Multiphysics commands as Java® code. Edit the files in a text editor to add additional commands. You can compile these Java® files into Java® Class files, with the extension .class, and run them as separate applications.

Model M-files are editable script files, similar to the Model Java® files, for use with MATLAB®. Model M-files, which have the extension .m, contain a sequence of COMSOL Multiphysics commands as a MATLAB® M-file. Run the Model M-files in MATLAB® like any other M-file scripts. Also edit the files in a text editor to include additional COMSOL Multiphysics commands or general MATLAB® commands. Running files in the Model M-file format requires the LiveLink for MATLAB®.

File Format Extension Read Write
MATLAB®: Model M-File .m Non Oui
MATLAB®: Function1 .m Oui Non
Java®: Model Java® File .java Non Oui
Java®: Model Class File .class Oui Non
C: Function .dll3, .so4, .dylib5 Oui Non
Excel®2 .xlsx Oui Oui

1Requires LiveLink for MATLAB®
2Requires LiveLink for Excel®, available for Windows® only
3Available for Windows® only
4Available for Linux® only
5Available for Mac OS X only