Learning Forum

[RJAditya]

Hello All
I am doing simulation on gas turbine combustors. The geometry consists of a liner plate with swirlers through which air flows. I want to find out, flow rate through each swirler. For that, I have created surfaces using those swirlers such that these are the surfaces through which air is flowing. I have then converted this geometry file into ".stl" format and tried to read it in fluent for imprinting these surfaces for post-processing. But once the file was read but the surfaces did not appear and other time fluent crashed after giving this error message "build grid : aborted due to critical error".
I have been stuck at this point for really long time. Any help would be greatly appreciated.

[Rob]

Did you read it in via the Surfaces tool?  Check the surface is actually in the same place as the model (mismatched scale is the most common cause of errors) and that the surface is valid (not folded). 

[RJAditya]

Sorry for the late reply. Rwoolhou thanks for your response.

I did not understand what you mean by surfaces tool but I read the file through the create surfaces option in fluent. In 'create surfaes' i selected "Imprint " which opened a console window in which there is a " Read " button.

And the surfaces are neither mismatched or folded.

[Rob]

And the face is definitely inside the domain and you picked the cell zone? 

[RJAditya]

Yes, the face that I created was definitely inside the domain but I don't know for sure where it will be after I import it to fluent. And can you please elaborate what you mean by picking cell zone.

[Rob]

You need to select the cell zone when you imprint. 

The surface will use the coordinates from when it was created. The question is whether anything scaled in either the original geometry or meshed surface. 

[RJAditya]

Okay I will try that.

I have one more doubt. While creating ".stl" file in which we want to have our surfaces of interest, should we create surfaces and then delete the remaining volume bodies or should we keep the volume bodies as well ?

[RJAditya]

Okay I will try that. Thanks a lot for the help

[Rob]

Surfaces are probably safer. Otherwise the whole lot (of surfaces) will be read in. Just use detach all on the volume to achieve this BEFORE any faceting.