Export for AcuSolve


AcuSolve is a CFD generalist solver from Altair HyperWorks suit. Contrary to other CFD tools, AcuSolve is based on finite elements method. That allows to be strongly linked to other FEA technologies (Finite Element Analysis) to solve fluid-structure complex interactions and multiphysics problems, as with Flux.

Export for AcuSolve

To answer to magneto-thermal coupling needs, quoted in the previous chapters, a strong coupling / cosimulation between Flux and AcuSolve is currently in progress.

In the meantime, it is possible now in Flux3D to export data readable by AcuSolve. As the cosimulations presented previously, the aim will be to export power densities (computed in static or averaged on one time period). In AcuSolve, a static simulation taking the heat sources into account is done.

The export is done in Nastran file .

Limitations and remarks

For this version, user has to take into account the following remarks and limitations:

  • The Flux project must be in 3D
  • The computation and export is done on Flux mesh. The Flux data are then interpolated in AcuSolve. By consequence, the Flux mesh should be fine.


The Flux3D data export procedure is presented below:

Step Action
0 Build and solve the Flux magnetic project

In case of magnetic transient simulation, create a “spatial transient computation” averaging on time the quantity to export.

The command is available in the following menu:

Advanced/Spatial transient computation (min., max., average., …)

As input:

  • Choose the operator “computing average values”
  • Quantity to compute
  • Evolutive path for time (one period)
  • Computation domain

As output:

Spatial quantity containing the averaged values


Export data for AcuSolve through the menu:

Data exchange > Export quantity > Export spatial quantity and formula starting from different types of supports

As input:

  • Support for export: choose the Flux region for the export
  • Export format: “.NAS AcuSolve file format”
  • File name
  • Length unit, system of coordinates, position
  • Formula of the quantity to compute and export (in transient magnetic, choose the spatial quantity created previously)

As output:

  • The data file