Welcome
User guide
The user guide gives information about principles and how to use Altair® Flux® 2024.
What's new?
See the release notes of the last and previous versions, with the necessary information on new features.
"How to" Documents
See a list of documents to understand how to use certain features.
- How to Use Solver Parallelization and Parametric Distribution with Flux?
  - How can I speed up my solving?
  - Solver parallelization
  - Parametric distribution
  - Solver parallelization and parametric distribution on a single machine
  - Solver parallelization and parametric distribution on a cluster through a scheduler as PBS
    - General Information
    - Altair PBS
    - Other schedulers
      This chapter provides some instructions to use Flux on a cluster using another Batch Scheduler than PBS.
- How to Launch Flux via Command Line?
- How to Configure the Memory in Flux?
- How to convert deprecated Bertotti into Modified Bertotti parameters
  The deprecated Bertotti model for the evaluation of iron losses is no longer available since Flux 2023. This How-to document presents the guidelines for converting a parameter set of that model into equivalent parameters of the improved, currently available Modified Bertotti model.
- How to Drive Flux with Compose?
- How to Experiment with NumPy in Flux?
- How to Get the Steps of a Scenario?
- How to import a HyperMesh mesh?
- How to import a SimLab mesh?
- How to Use External Jython Classes in Flux?
- How to use the Flux-AcuSolve coupling with the Import/Export context?
- How to use the Flux-OptiStruct coupling with the Import/Export context?
- How to mesh skin effect?
Flux Supervisor
The Flux supervisor allows to run projects, examples, pythons scripts; to configure user preferences; to access tools...
Flux
Flux is a finite element software for low-frequency electromagnetic and thermal simulations. Both, 2D and 3D solutions are available...
Flux Skew
Flux Skew is a module dedicated to the analysis of rotating electric machines with skewing, allowing a straightforward geometric and physical description in 2D and the consideration of continuous or step skewing effects.
Flux PEEC
Flux PEEC is a 3D modeling module dedicated to electrical interconnections of power electronics devices. It also provides RLC extraction and generation of SPICE-like equivalent circuits.
Material Identification
The Material Identification tool is based on the Altair Compose environment and allows determining from measurements the parameters and coefficients required to create a material in Flux.
Altair Material Datacenter (AMDC)
AMDC is a comprehensive material database maintained by Altair and partner suppliers of engineering materials. Ready-to-use, Flux-compatible models may be obtained directly from this database for a growing number of materials.
Material Manager
Flux has a material manager with its own material base.The user can create his own material base and import them into the Flux models to be studied.
Flux e-Machine Toolbox
FeMt is a application in Flux dedicated for Electric Machine which permits to compute and postprocess results like efficiency maps.
Flux Examples
See the lists of examples 2D, 3D, SKEW and PEEC with all available documents and all project and python files.
Flux in SimLab Examples
See the lists of 2D and 3D SimLab examples using the Flux and Mipse solvers, with all available documents, *.slb databases and all script files.
Mementos
See a list of Memento documents to understand certain Flux features.
Macros
Flux proposes several macros enabling doing actions that are not yet implemented in Flux.
PyFlux Documentation (Beta version)
This documentation deals with the Jython script used in Flux and allows to understand the various structures of entities and functions, and use it in user scripts for example.
Flux installation guide
This document provides instructions for Flux installation on supported platforms.
Flux Starting Guide
Several short videos to start with Flux.

Input file

The Input file can be created automatically by using the command Generate zip file for PBS in Flux, or by clicking on a button in Flux e-Machine Toolbox. It can either be a single Python file, or a zip file containing a .FLU folder and/or Python file(s), which can also be created manually.

Create automatically input file by using command Generate zip file for PBS in Flux

From Flux 2022.3, generate the input file for PBS from a Flux project:

Solving > Generate zip file for PBS

Note: This command Generate zip file for PBS coupling is compatible with Flux and PBS 2022.3 and later versions.

When selecting this command, the following dialog window is displayed:

You have to select the scenarios to solve with PBS.

The zip file *.zip is created in the working directory, with the Flux project *.FLU and the Python *.py inside.

Create automatically input file in Flux e-Machine Toolbox

From Flux 2022.1, is now possible to run tests via PBS in FeMT to save computation time.

Once the project has been correctly defined in FeMT, the different steps are as follows:

In FeMT, export the necessary files for PBS by clicking on button 1 in the image below;
In PBS, run the computation through a cluster;
In FeMT, import the PBS result by clicking the button 3 in the image below.

Create manually input file with python file(s)

If the project is completely defined by your Python script, you can submit a job using only this script.

If your project is defined by several Python scripts, you can also zip all the Python scripts and use the zip file as the input for your job submission. The main Python script, which will be the first to be called, must be named as your zip file.

Create manually input file with a FLU folder

If you have a Flux project ready to be solved, you can zip it and use the zip file as an input to your job. Flux will solve all the scenarios of the project.

You can also zip a Flux project along with one or several Python files. Name the main Python script as your zip file, as it will be the first to be called.

Important: Other cases are not supported and may lead to errors.