Support Knowledge Base

General

COMSOL Troubleshooting Guide

Solution Number: 1303 Versions: All versions

## General Issues * KB 933: Troubleshooting graphics issues * KB 1083: Error: An error has occurred. See the log file C:\Users... * KB 1285: Graphics Window not responding on computer with Intel Iris Xe graphics chip * ...

COMSOL Software Architecture

Solution Number: 1299 Versions: All versions

#Overall Architecture The following diagram shows the overall architecture of a network, including computers running COMSOL Multiphysics, COMSOL Multiphysics Server, COMSOL Client, compiled COMSOL apps; external ...

COMSOL not working on a Linux cluster

Solution Number: 1298 Applies to: COMSOL Multiphysics, COMSOL Server Versions: 6.1, 6.0, 5.6

I am observing that distributed cluster jobs on Linux are not starting up. I am receiving error messages from MPI. The underlying reason for COMSOL not working on a Linux cluster might be that the network interface ...

COMSOL 6.0 macOS Apple Silicon Native (M1) Support

Solution Number: 1294 Versions: 6.0

Please note This entry concerns COMSOL 6.0 for COMSOL 6.1, please see Knowledge Base 1300 Limitations LiveLink for MATLAB and LiveLink for Simulink are not supported. COMSOL Model Manager Server is not supported. ...

How can I check if I can connect to the license server

Solution Number: 1288 Versions: All versions

When trying to launch COMSOL Multiphysics, I get an error message that indicates that I am not able to connect to the license manager. How can I check that? There are several ways of testing if you can connect to a ...

Graphical Glitches in the User Interface on Gaming Computers

Solution Number: 1290 Versions: 5.6

Some users running COMSOL Multiphysics on gaming computers have started experiencing graphical glitches in the user interface. It looks like rows are replaced by magnified parts of themselves. The glitches may also ...

Network connect to THIS_HOST failed.

Solution Number: 1289 Versions: All versions

When launching COMSOL Multiphysics on Linux, i receive an error message that says: Network connect to THIS_HOST failed. The license file indicates THIS_HOST, and the server is not running on this host. If it's ...

The log window in COMSOL Multiphysics is unreadable on my Linux computer

Solution Number: 1287 Versions: All versions

The Log window in my COMSOL Multiphysics sessions looks like this: This issue is most commonly observed on Ubuntu 20.04 LTS (Focal Fossa) when the package texlive-fonts-recommended is present. But it has been ...

Graphics Window not responding on computer with Intel Iris Xe graphics chip

Solution Number: 1285 Versions: All versions

I recently bought a laptop with the new Intel Iris Xe graphics chip. When I run COMSOL Multiphysics on it the Graphics window does not appear to respond to mouse movements. There are three suggested workarounds for ...

COMSOL Multiphysics 5.5 fails to start on macOS 11

Solution Number: 1282 Versions: 5.5

After upgrading to macOS 11, COMSOL Multiphysics 5.5 fails to launch. # Make sure you are running COMSOL Multiphysics 5.5 Update 3. From the COMSOL Multiphysics installation directory, go to the directory called ...

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Learning Center Resources

Learn how to use the COMSOL Multiphysics^® software for modeling devices, designs, and processes. Access the Learning Center courses and articles below for modeling guidelines, step-by-step demonstrations, and exercise files.

Courses

How to Navigate the COMSOL Multiphysics^® User Interface

Introduction to Defining Multiphysics Models

Introduction to Electro-Thermal-Mechanical Modeling

Modeling Electromagnetic Coils

Modeling Nonequilibrium Plasma

Modeling Pressure Acoustics

Modeling Resistive and Capacitive Devices

Modeling with Partial Differential Equations in COMSOL Multiphysics

Using Swept Meshes for Model Geometries

Articles

AC/DC Module Functionality as of Version 6.0

Applying Translations, Scaling, Reflection, and Rotation via the Deformed Geometry and Moving Mesh Interfaces

Building Simulation Applications with LiveLink™ for SOLIDWORKS^®

CFD Modeling Capabilities in COMSOL Multiphysics^® Version 5.6

Computing Space and Time Integrals

Copying and Reusing Boundary Mode Analysis Results

Coupling Physics Between Model Components for Multiphysics Models

Electro-Thermal-Mechanical Workflow and CAD Import

Evaluating Results and Introducing Nonlinearities in a Current-Driven Model

Examples of the General Extrusion Operator

Examples of the General Projection Operator

Examples of the withsol Operator

Geometry Concepts and Nomenclature in COMSOL Multiphysics^®

Handling Complex-Valued Numbers and Problems in the Frequency Domain

How to Estimate the Number of Degrees of Freedom in a Model

How to Install COMSOL Multiphysics^®

How to Install the COMSOL License Manager

How to Optimize Energy Performance of Buildings

How to Reduce the Size of Your Model File

How to Select Geometry

How to Synchronize Geometry Selections from SOLIDWORKS^® to COMSOL Multiphysics^®

How to Synchronize Parameters Between SOLIDWORKS^® and COMSOL Multiphysics^®

Identifying and Selecting Geometric Entities by Index Number

Importing Topological Data, Meshes, and Images

Integrating Along Streamlines and Extracting Particle Statistics

Introduction to Heat Transfer in Thin Layers

Introduction to LiveLink™ for MATLAB^®

Introduction to Modeling Acoustic Metamaterials

Introduction to Modeling Acoustic–Structure Interaction

Introduction to Modeling Loudspeakers

Introduction to Modeling Periodic Structures

Introduction to Modeling Plasma Using the Plasma Module

Introduction to Modeling Porous Media Flow

Introduction to Modeling Small Acoustic Devices

Introduction to Parameter Estimation Studies in COMSOL Multiphysics^®

Introduction to Shape Optimization

Introduction to Simulating Nondestructive Testing Methods

Introduction to Simulating Semiconductor Devices

Introduction to Vacuum System Modeling

Introduction to the Acoustics Module

Introduction to the Battery Design Module

Introduction to the Chemical Reaction Engineering Module

Introduction to the Composite Materials Module

Introduction to the Corrosion Module

Introduction to the Fuel Cell & Electrolyzer Module

Introduction to the Model Manager

Introduction to the Rotordynamics Module

LiveLink™ for Simulink^®: Lumped Battery Modeling

Manually Setting Up the Geometric Multigrid Solver

Manually Setting the Scaling of Variables

Mesh Refinement, CAD Import, and Simulation Apps

Meshing and Solving Pressure Acoustics Models

Modeling Antennas in COMSOL Multiphysics^®

Modeling Biosensors

Modeling Heat Transfer with COMSOL Multiphysics^® Version 5.6

Modeling Inductively Coupled Plasma and Microwave Plasma

Modeling Joule Heating in the Time Domain for Resistive and Capacitive Systems

Modeling Manufacturing Processes

Modeling Nonlinear Materials

Modeling Optical Waveguides

Modeling Optoelectronic Devices

Modeling Piezoelectric Devices

Modeling Step Transitions

Modeling TEM and Quasi-TEM Transmission Lines

Modeling Thermomechanics

New Functionality in the Chemical Reaction Engineering Module Version 5.6

Optimization of Power Electromagnetics

Performing a Mesh Refinement Study and Using Selections and Variables

RF and Microwave Modeling Capabilities in COMSOL Multiphysics^® Version 5.6

Ray Optics Modeling Capabilities in COMSOL Multiphysics^® Version 5.6

Repairing and Improving Imported Meshes from 3D Scans

Setting Up and Solving Electromagnetic Heating Problems with High-Frequency Loads

Simulating Heat Transfer in Layered Materials

Simulating Large Models with COMSOL Multiphysics^® Solvers

Simulating Metamaterials with COMSOL Multiphysics^®

Solving Transient Models That Have Inconsistent Initial Values

The Basics of Modeling Heat Transfer

The Basics of Parameter Estimation

The Basics of Ray Optics

Two-Phase Flow Modeling Guidelines

Understanding and Changing the Element Order

Understanding the EEDF and Boltzmann Equation, Two-Term Approximation

Using LiveLink™ for Simulink^®

Using LiveLink™ for SOLIDWORKS^® to Create Geometry in COMSOL Multiphysics^®

Using Symmetry to Reduce Model Size

Viewing and Accessing the Equations and Variables for Physics Feature Nodes

COMSOL^® Installation Companion