Computational Fluid x-Dynamics (CFxD) Forum - Recent Topics

Rotation

Dmitry — Fri, 03 Apr 2026 18:48:19 +0000

Can you please add support of rotation.

For example for simulation of electric ducted fan.

Also, it will be great if it will be possible to evaluate a thrust of the fan and torque.

Model attached.

Electric_Ducted_Fan_AI_model.STEP

Conjugate heat transfer

Alexander — Fri, 03 Apr 2026 13:14:50 +0000

We did a large step with conjugate heat transfer implementation. It is available under new Pro license. Below the last update information:

Version 2.05.9 introduces several new features, interface improvements, and documentation updates. The main addition in this release is the implementation of conjugate heat transfer, extending the workflow to coupled fluid–solid thermal simulations. The update also adds several usability improvements in setup and post-processing.

What is new in CFxD 2.05.9

General (NEW): Pro license added.
General (IMP): User interface improved.
General (IMP): Manual updated.
All (NEW): Conjugate heat transfer implemented.
Solution (NEW): Monitoring point validation added.
Setup/Result (NEW): Selection highlight added.
Result (NEW): External data import added to Chart.

#8: Mass flow outlet

Alexander — Fri, 20 Mar 2026 19:18:34 +0000

On behalf of one of our users, we received a suggestion to implement a mass flow boundary condition at the outlet.

#7: Mesh refinement

Alexander — Sat, 14 Mar 2026 18:56:20 +0000

Suggested by the user via email: Do you consider to extend the mesh refinement options?

#5: The hidden elements re-appear in the Post tree

Alexander — Sun, 08 Mar 2026 21:18:52 +0000

Reported by the user via contact form: The hidden elements re-appear in the Post tree after adding a new element.

#4: The reconstraction error message

Alexander — Tue, 03 Mar 2026 16:23:14 +0000

The reconstraction error message appears after Solution stage. There is no problems with visualization in the Result.

#6: Scales customization

Alexander — Tue, 03 Mar 2026 16:20:36 +0000

Suggested by the user via email: Please add scale customization in the Result.

#5: Fill option

Alexander — Fri, 27 Feb 2026 17:12:32 +0000

Suggested by user through contact form: Fill option (fluid volume) for the exported solid geometry.

#4: Mixing of fluids

Alexander — Fri, 27 Feb 2026 17:09:54 +0000

Suggested by user through contact form: Mixing of two fluids.

Mesh for large domain with small geometrical entities

Alexander — Wed, 25 Feb 2026 14:59:29 +0000

This topic is opened to discuss meshing a large domain (tank) with small geometric features (pipes). The tank dimensions are about 25 m, while the attached pipes have a diameter of only 10 cm.

In CFxD, the default local refinement is applied to boundary names that contain “wall”. For this reason, “wall” was used in the pipe naming. The large tank surfaces were named “tank”, so refinement was not applied to them.

An example is shown in the first image. Unfortunately, the mesh quality is low because the base cell size is large (0.146 m). To improve the quality, the base cell size can be reduced and/or the refinement level increased. However, these changes produce a larger mesh, which may exceed the Demo mode limit. One attempt is shown in the second image.