Non-Positive Volume Cell while Point Set Morphing in Star CCM+

Ranshua · July 29, 2021, 02:38

Hi

I'm solving a problem which change its wall position to designated position with STAR CCM+.

I gave extrapolated pressure outlet and stagnation inlet, 6bar for pressure, 5bar for supersonic pressure and 300 k for static temperature.
My mesh is 2D polygonal mesh and I also gave prism layer.

I try this with [Morphing-Point Set-Target Position] because the wall of nozzle must be at exactly designated position after morphing is done.
I used (x, y, z) table to define both point set and target position. And Floating option for moving wall.
After I start morphing, however, it stop with Non-Positive Volume Cell Error and the figure get distorted to unnatural form.

Why this Non-Positive Volume Cell Error happen in Point Set Morphing and how can I solve this?

gaussiano · May 4, 2022, 04:39

Hi Ranshua,
I am having similar difficulties. Were you able to solve your problem?

July 29, 2021, 02:38	Non-Positive Volume Cell while Point Set Morphing in Star CCM+	#1
Ranshua New Member Kyunghwan Han Join Date: Jul 2021 Posts: 3 Rep Power: 5	Hi I'm solving a problem which change its wall position to designated position with STAR CCM+. I gave extrapolated pressure outlet and stagnation inlet, 6bar for pressure, 5bar for supersonic pressure and 300 k for static temperature. My mesh is 2D polygonal mesh and I also gave prism layer. I try this with [Morphing-Point Set-Target Position] because the wall of nozzle must be at exactly designated position after morphing is done. I used (x, y, z) table to define both point set and target position. And Floating option for moving wall. After I start morphing, however, it stop with Non-Positive Volume Cell Error and the figure get distorted to unnatural form. Why this Non-Positive Volume Cell Error happen in Point Set Morphing and how can I solve this?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Ansys Licence Serve on Ubuntu 16.04 LTS	david.pasquale	ANSYS	2	January 20, 2017 12:52
On the damBreak4phaseFine cases	paean	OpenFOAM Running, Solving & CFD	0	November 14, 2008 22:14
[Gmsh] Gmsh and samplesurface	touf	OpenFOAM Meshing & Mesh Conversion	2	December 10, 2007 03:27
[blockMesh] Axisymmetrical mesh	Rasmus Gjesing (Gjesing)	OpenFOAM Meshing & Mesh Conversion	10	April 2, 2007 15:00
udf to set vel. = 0 at a grid point or a cell	Ralf Schmidt	FLUENT	0	September 22, 2006 10:45

May 4, 2022, 04:39		#2
gaussiano New Member Join Date: May 2022 Posts: 1 Rep Power: 0	Hi Ranshua, I am having similar difficulties. Were you able to solve your problem?