Supported File Formats


The COMSOL Model file type, with the extension .mph, is the default file type containing the entire model tree and application tree from the Model Builder and Application Builder, respectively. The file contains both binary and text data. The mesh and solution data is 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 that can be imported directly to the Geometry or Mesh nodes in the model tree.

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

Формат файла Раcширение Чтение Запись
Модель COMSOL .mph Да Да
Двоичные данные .mphbin Да Да
Текстовые данные .mphtxt Да Да
Генератор интерфейсов для новой физики .mphphb Да Да


The CAD Import Module and Design Module allow 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 3MF (3D), DXF (2D), PLY (3D), VRML (3D), and STL (3D) file types are available for import with COMSOL Multiphysics and do not require any add-on products. Unless noted otherwise in the table below, import of the listed file types is available on all supported versions of Linux®, Mac OS X, and Windows® operating systems.

Формат файла Раcширение Импорт Экспорт
AutoCAD®1,2,3 .dwg Да Да9
Inventor®1,2,3 .ipt,.iam Да Да9
NX®1,4 .prt Да Нет
PTC® Creo® Parametric1,3 .prt,.asm Да Да9
PTC® Pro/ENGINEER®1,3 .prt,.asm Да Да9
Revit® Architecture3,5 .rvt Да9 Да9
Solid Edge®3,6 .par,.asm Да9 Да9
SOLIDWORKS®1,2,3 .sldprt,.sldasm Да Да9
DXF (3D1,2 and 2D) .dxf Да Да10
Parasolid®1 .x_t,.xmt_txt,.x_b,.xmt_bin Да Да
ACIS®1 .sat,.sab,.asat,.asab Да Да
STEP1 .step,.stp Да Да
IGES1 .iges,.igs Да Да
CATIA® V52,7 .CATPart,.CATProduct Да Нет
VRML, v18 .vrml,.wrl Да Нет
3MF .3mf Да Нет
PLY .ply Да Нет
STL .stl Да Да

1Requires one of the LiveLink™ products for AutoCAD®, Revit®, PTC® Creo® Parametric™, Inventor®, PTC® Pro/ENGINEER®, Solid Edge®,SOLIDWORKS®, CAD Import Module, or Design Module
2Импорт поддерживается только в ОС Windows
3Synchronization of files between COMSOL Multiphysics® and a linked CAD program supported on Windows® 7, 8.1 and 10 operating systems only
4Import supported on Windows® and Linux operating systems only
5Requires LiveLink™ for Revit®
6Requires LiveLink™ for Solid Edge®
7Требуется наличие Модуля CAD-импорт (или одного из продуктов LiveLink AutoCAD®, PTC® Creo® Parametric™, Inventor®, PTC® Pro/ENGINEER®, SOLIDWORKS®, или SpaceClaim®) и File Import for CATIA® V5
8Ограниченно одной геометрической областью
9В/из файла через подключенный пакет CAD
10Writing to file is supported for 2D geometry only


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, in the model tree.

Формат файла Раcширение Чтение Запись
IPC-25811 .cvg, .xml Да Нет
ODB++1 .zip,.tar,.tgz,.tar.gz Да Нет
GDS1 .gds Да Нет
Touchstone2 .s2p, .s3p, .s4p, ... Нет Да
SPICE Circuit Netlist3 .cir Да Да

1Requires the ECAD Import Module
2Requires one of the AC/DC Module, RF Module, MEMS Module, or Wave Optics Module
3Requires one of the AC/DC Module, RF Module, MEMS Module, Plasma Module, or Semiconductor Module

Material Databases

The Chemical Reaction Engineering Module and the Plasma 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.

Формат файла Раcширение Чтение Запись
CHEMKIN®1 .dat, .txt, .inp3 Да Нет
CAPE-OPEN (direct connection)1 n/a N/A N/A
LXCAT file2 .lxcat,.txt Да Нет

1 Any file format is allowed, these are the most common extensions
2Requires the Plasma Module
3Any extension is allowed; These are the most common extensions


The NASTRAN® Bulk Data file types are used to import a volumetric mesh. The VRML, STL, PLY, and 3MF file types are used to import a triangular surface mesh that can serve as a starting point for creating a volumetric mesh.

Формат файла Раcширение Чтение Запись
3MF .3mf Да Да
NASTRAN® Bulk Data .nas, .bdf, .nastran, .dat Да Да
PLY .ply Да Да
Sectionwise .txt, .csv, .dat Да Да
STL .stl Да Да
VRML, v1 .vrml, .wrl Да Нет
VTK .vtu Нет Да

Цифровые данные, графика и видео

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. The 3D representation from a 3D plot can be exported to the glTF™ format for 3D scene exchange.

Формат файла Раcширение Чтение Запись
Adobe® Flash® .swf Нет Да
Animated GIF .gif Нет Да
AVI1 .avi Нет Да
BMP .bmp Да Да
EPS (1D graphs) .eps Нет Да
glTFTM .glb Нет Да
JPEG .jpg, .jpeg Да Да
MP42 .mp4 Да Нет
OGV2 .ogv Да Нет
PNG .png Да Да
TIFF .tif, .tiff Нет Да
WEBM2 .webm Да Нет

1Доступно только в Windows

2Available in the Application Builder, for Windows® only, in the video form object

Языки программирования

Model files for Java® are editable files with the extension .java that contain sequences of COMSOL 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. Program code used in model files for Java® is essentially identical to that of the Method editor in the Application Builder. However, the Method editor comes with an integrated Java® compiler.

Model files for MATLAB® are editable script files (M files), similar to the model files for Java®, for use with MATLAB®. These model files, which have the extension .m, contain a sequence of COMSOL commands as a MATLAB® M file. You can run the model files in MATLAB® like any other M file scripts. It is also possible to edit the files in a text editor to include additional COMSOL commands or general MATLAB® commands. Running model files in the M file format requires LiveLink™ for MATLAB®.

With a license for LiveLink™ for Excel®, you can save models on the Visual Basic for Applications (VBA) format for use with Excel®.

Complied C-code can be linked with a model or application in several ways including the External Material and External Function interfaces in the Model Builder and as the External Library interface in the Application Builder.

Формат файла Раcширение Чтение Запись
MATLAB®: Model file for MATLAB® .m Нет Да
MATLAB®: Function1 .m Да Нет
Java®: Archive File .jar6 Да Нет
Java®: Compiled model file for Java® .class Да Нет
Java®: Model file for Java® .java Нет Да
C: Function .dll3, .so4, .dylib5 Да Нет
Excel®2 .xlsx,.vba Да Да

1Requires LiveLink™ for MATLAB®
2Requires LiveLink™ for Excel®, available for Windows® only
3Доступно только в Windows®
4Доступно только в Linux®
5Доступно только в Mac OS X
6Can be linked to a method in an application using the Application Builder

Форматы данных интерполяции

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.

Формат файла Раcширение Чтение Запись
Copy and paste spreadsheet format n/a Да Да
Excel® spreadsheet1 .xlsx Да Да
Table .txt, .csv, .dat Да Да
Grid .txt Да Да
Sectionwise .txt, .csv, .dat Да Да
Spreadsheet .txt, .csv, .dat Да Да
Parameters .txt, .csv, .dat Да Да
Variables .txt, .csv, .dat Да Да
Continuous and Discrete color table .txt Да Нет
Point data for Cut Point data sets .txt Да Нет
DEM .dem Да Нет
VTK .vtu Нет Да

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