Meshing quarter circle in Pointwise

Rajan Bhandari · September 24, 2018, 03:27

hello everyone,
I need to mesh my 3d geometry of a nozzle whose inlet in a quarter circle. I tried to mesh using O grids but could not do it as there are only three connectors while the assembly domain asks four edges? Anybody has any idea how to create mesh in quarter circle?

coupsdebambous · September 26, 2018, 21:38

Hi Rajan,

can you describe further what connectors you are talking about?
It is generally possible to generate a surface mesh ("domain" in PointWise) with three connectors, but you'll need more for volumes.

If you're new to the software (and its nomenclature) the tutorials are a great place to start.

Best.

Rajan Bhandari · September 28, 2018, 00:06

I was only concerned about meshing like in ICEM. I could not generate the mesh as in ICEM from Pointwise for O-grids. If you know what I mean?

cnsidero · October 3, 2018, 10:56

Checkout this script:

https://github.com/pointwise/TriQuad

I tried it on three connectors in a quarter circle arrangement and worked as advertised.

-Chris

Rajan Bhandari · October 6, 2018, 02:11

But I was concerned about structured mesh with wall spacing for boundary layer. Any idea regarding that?

RcktMan77 · October 6, 2018, 14:26

An O-H, or butterfly topology will work just as well for a quartercircle since the topology is symmetric. You could also use a hyperbolic extrusion off of your wall boundaries, and then use an H-grid to fill in the volume between the extents of the extruded topology. Use the elliptical solver on the domains at the streamwise ends while letting interior boundaries float. Then use the elliptical solver again on the volume grid in the same manner. There is a webinar on quickly generating a structured mesh for a serpentine inlet that demonstrates this approach on Pointwise’s website.

September 24, 2018, 03:27	Meshing quarter circle in Pointwise	#1
Rajan Bhandari New Member Rajan Bhandari Join Date: Dec 2017 Posts: 14 Rep Power: 8	hello everyone, I need to mesh my 3d geometry of a nozzle whose inlet in a quarter circle. I tried to mesh using O grids but could not do it as there are only three connectors while the assembly domain asks four edges? Anybody has any idea how to create mesh in quarter circle?

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September 26, 2018, 21:38		#2
coupsdebambous New Member Quentin d'Avout Join Date: Oct 2017 Location: Marseille Posts: 19 Rep Power: 8	Hi Rajan, can you describe further what connectors you are talking about? It is generally possible to generate a surface mesh ("domain" in PointWise) with three connectors, but you'll need more for volumes. If you're new to the software (and its nomenclature) the tutorials are a great place to start. Best.

September 28, 2018, 00:06		#3
Rajan Bhandari New Member Rajan Bhandari Join Date: Dec 2017 Posts: 14 Rep Power: 8	I was only concerned about meshing like in ICEM. I could not generate the mesh as in ICEM from Pointwise for O-grids. If you know what I mean?

October 3, 2018, 10:56		#4
cnsidero Senior Member Chris Sideroff Join Date: Mar 2009 Location: Ottawa, ON, CAN Posts: 434 Rep Power: 22	Checkout this script: https://github.com/pointwise/TriQuad I tried it on three connectors in a quarter circle arrangement and worked as advertised. -Chris

October 6, 2018, 02:11		#5
Rajan Bhandari New Member Rajan Bhandari Join Date: Dec 2017 Posts: 14 Rep Power: 8	But I was concerned about structured mesh with wall spacing for boundary layer. Any idea regarding that?

October 6, 2018, 14:26		#6
RcktMan77 Senior Member Zach Davis Join Date: Jan 2010 Location: Los Angeles, CA Posts: 101 Rep Power: 16	An O-H, or butterfly topology will work just as well for a quartercircle since the topology is symmetric. You could also use a hyperbolic extrusion off of your wall boundaries, and then use an H-grid to fill in the volume between the extents of the extruded topology. Use the elliptical solver on the domains at the streamwise ends while letting interior boundaries float. Then use the elliptical solver again on the volume grid in the same manner. There is a webinar on quickly generating a structured mesh for a serpentine inlet that demonstrates this approach on Pointwise’s website.