Topology-error
 

Hello,

I am trying to mesh the fluid volume of a radial compressor with turbogrid. After preparing the hub, the shroud and the blade geometry of main-blade and splitt-blade with the Ansys Design Modeler, I wanted to mesh the volume in turbogrid. The geometry seems to be loaded correctly, but the topology fails with the following Error:


ERROR
An error was thrown while generating the span geometry for Topology.
This probably means the selected topology is not appropriate. Details are given below:
U value outside ot its bounds. Value =-0.243

How can I solve this problem?

Thank you for your answers.

I think I had a similar error before. In my case, part of my blade was cutting through in the inlet/outlet interface of the TurboGrid.
So I would suggest you double-check the geometry (location of inlet/outlet/hub/shroud) - maybe give the TG mesh some more space around the blade.

It would maybe also help to post a screenshot of your geometry in Ansys Design modeler

Hello,
I'm trying to mesh a radial turbine (with splitters) Using TurboGrid, I have exported the geometry of blades and splitters using Design Modeler via two separate ExportPoints features for blades and splitters.
Here is where I'm stuck:
1. When I try to mesh the turbine with both blades and splitters, I get the same topology error which is discussed in this topic.
2. I can mesh a turbine with just blades, or just splitters which seems to mean that the curves don't have any problems and topology constraints is the cause of error.
3. I changed the the place of leading edge and trailing edge and meshed the geometry as a centrifugal compressor, this resulted to a nice mesh without even a warning!

Is it possible that I use the compressor mesh and correct it by boundary conditions in the next step?
Would this effect the validity of results?

Hey all,

Any resolution to this?

Im trying to add a second splitter to a compressor model and that seems to be triggering the error the first poster described/.

try change the rotation direction, it works on my cases sometimes.

This is correct. It works for me!