Meshing of circular pipe in CFX-mesh

Fatnes · March 17, 2009, 15:11

Hi.

I'm new to CFX and need some help with my meshing. My geometry is a horizontal pipe (d=45mm, L=400mm) with a 90 degree bend. I want to simulate particle sedimentation in the bend.

How should i mesh my geometry? Doe's anyone have suggestions to best mesh a circular pipe with finer mesh in the bend section?

mvoss · March 18, 2009, 03:05

hi,

wich mesher do you use??
generally:
make it a extruded 2D-mesh. with start / endfaces at the inlet/outlet of your modell.
check out the manual on "Extruded Meshing".
neewbie

Fatnes · March 27, 2009, 06:24

Hi.

Thank you for the suggestion. I use CFX-mesh.

I tried to follow the manual in CFX-help for the 2D Extruded meshing, but i got the following error message: "No boundary edge found. The surface may be highly curved dand mesh resolution may be poor. Try reducing the mesh spacing on the problem surface and retry (it is the my horizontal pipe that is marked red).

As i can see my body and face spacings should be ok. I've used the inflation option and inlet/outlet as the extruded periodic pair (location 1 and 2). Under the Option tab in Tree viev i use "Delaunay" under Surface Meshing, "Full" under
D Extrusion Option, a uniform distribution and I have changed the "Number of layers".

mvoss · March 27, 2009, 06:29

hi,

cut your model by half. so you get a leading edge.
that should work.

March 17, 2009, 15:11	Meshing of circular pipe in CFX-mesh	#1
Fatnes New Member Join Date: Mar 2009 Location: Norway Posts: 16 Rep Power: 17	Hi. I'm new to CFX and need some help with my meshing. My geometry is a horizontal pipe (d=45mm, L=400mm) with a 90 degree bend. I want to simulate particle sedimentation in the bend. How should i mesh my geometry? Doe's anyone have suggestions to best mesh a circular pipe with finer mesh in the bend section?

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March 18, 2009, 03:05		#2
mvoss Senior Member Matthias Voß Join Date: Mar 2009 Location: Berlin, Germany Posts: 449 Rep Power: 20	hi, wich mesher do you use?? generally: make it a extruded 2D-mesh. with start / endfaces at the inlet/outlet of your modell. check out the manual on "Extruded Meshing". neewbie

March 27, 2009, 06:24		#3
Fatnes New Member Join Date: Mar 2009 Location: Norway Posts: 16 Rep Power: 17	Hi. Thank you for the suggestion. I use CFX-mesh. I tried to follow the manual in CFX-help for the 2D Extruded meshing, but i got the following error message: "No boundary edge found. The surface may be highly curved dand mesh resolution may be poor. Try reducing the mesh spacing on the problem surface and retry (it is the my horizontal pipe that is marked red). As i can see my body and face spacings should be ok. I've used the inflation option and inlet/outlet as the extruded periodic pair (location 1 and 2). Under the Option tab in Tree viev i use "Delaunay" under Surface Meshing, "Full" under D Extrusion Option, a uniform distribution and I have changed the "Number of layers".

March 27, 2009, 06:29		#4
mvoss Senior Member Matthias Voß Join Date: Mar 2009 Location: Berlin, Germany Posts: 449 Rep Power: 20	hi, cut your model by half. so you get a leading edge. that should work.