Centrifugal fan

[ZachJa]

I check - geometry of joining faces matches 100%.
Visualization at meshes selection is set to 1, ie - enabled.
Tried to use EnSight Golg instead of MED, it solved MED empty mesh error, but have got another error:
SIGSEGV signal (forbidden memory area access) intercepted!
Is there kind of working example or tutorial how to use turbomachinery mode in GUI?

Thank you!

[Yvan Fournier]

Hello,

There is no tutorial, though I posted an example xml file quite recently.

To debug your case, following the usual forum recommendations should help...

Regards,

Yvan

[ZachJa]

Could you please specify where could I find this .xml example file?

[Yvan Fournier]

Hello,

Search for turbomachinery in this forum and you'll find it in the last 2 months.

Regards,

Yvan

[ZachJa]

Thank you, I found using the clue you gave.

could you please help to understand what current glibc detected message means?
https://www.dropbox.com/s/h5q3cdzkp4xk3 ... d.png?dl=0
I have got this when started to apply periodicity by rotation.

[Yvan Fournier]

Hello,

Rotational periodicity is currently only compatible with the turbomachinery module when periodic faces and rotor/stator interfaces are not adjacent.

Regards,

Yvan

[ZachJa]

I am trying to simulate just 1/8 segment of rotor without stator ie do not have any rotor/stator interfaces, only rotational symmetric periodicity of 1/8 part of wheel.
Is it possible to simulate just rotor? or stator should be added anyway?
Mesh: https://www.dropbox.com/s/o6nnbdkeyie5w ... 2.med?dl=0
xml: https://www.dropbox.com/s/56pz5fa0zj6i0 ... case2?dl=0

Thank you!

[Yvan Fournier]

Hello,

Still, you have an active transient turbomachinery model with periodicity active, and this seems to be the cause of the crash (due to mesh updates in the turbomachinery model not expecting periodicity.

This case sems to work with the "frozen rotor" model, also fixing your rotor selection criterai (VOL and not rotor_faces).

Regards,

Yvan

[ZachJa]

Works,

I used frozen rotor and whole segment volume VOL as selection criteria, also corrected periodic boundaries - they should be left and right side of segment.

Thank you!

[ZachJa]

Now I am trying to simulate wheel rotation (as sector with left_sym and right_sym - which was OK in previous case) inside casing. In Meshes selection I set face joining for wheel segment outlet and casing inlet and defined this two faces as free_inlet_outlet (not sure is correct definition or not...) in boundary conditions. Have chosen full transient simulation (also tried with frozen rotor - without success).

Casing mesh: https://www.dropbox.com/s/qys0hef44vo6n ... 1.med?dl=0
Wheel sector mesh: https://www.dropbox.com/s/r0mvu4ggae0qy ... 1.med?dl=0
xml: https://www.dropbox.com/s/zbotjgzlratvu ... 1.xml?dl=0

Have got an error: SIGSEGV signal (forbidden memory area access) intercepted!

What is wrong? is it possible at all to set this kind (with wheel sector) of simulation? or I should use entire wheel (not just sector - ie without rotattional periodic boundaries)? or it is not impossible at all?

Thank you in advance!