[TurboGrid] 2D linear cascad in TurboGrid (Meshing)

Adde84 · September 10, 2013, 02:44

Hi!

I have a problem that I hope anyone can help me with.

The problem is that I would like to "mimic" a a 2D Blade-to-Blade calculation in CFX by using TurboGrid.
My idea is to mesh a linear cascade section and set the end wall (hub & tip) boundary to symmetry. (Ideally can the cascade span be wery short (2 cells?)).
The problem is that when using turbogrid the hub and shroud will be swept and therefore not suited for a symmetry bundary.
So is there any way to have straight endwalls in TurboGrid that can have symmetry boundary condition?

Regards//Adde

Jack001 · August 16, 2016, 18:39

I am wondering this too. Any luck in finding if this is possible?

Far · August 21, 2016, 12:57

make the inlet and outlet as hub and casing. this way you can trick turbogrid and get the required mesh in it.

Jack001 · August 21, 2016, 13:02

Hi Far,

Thanks for your reply - I'm not exactly sure how you mean - the only thing I can think of in terms of tricking TG to do it is to make a blade that is just 2D profiles stacked in 3D and then set the number of blades in the full annulus to something ridiculously high and scale up the the hub radius in order for the hub and shroud to have no curvature. Im not too sure about the robustness of this method though. Is that what you mean?

Thanks!

September 10, 2013, 02:44	2D linear cascad in TurboGrid (Meshing)	#1
Adde84 New Member Adrian Join Date: Sep 2013 Posts: 1 Rep Power: 0	Hi! I have a problem that I hope anyone can help me with. The problem is that I would like to "mimic" a a 2D Blade-to-Blade calculation in CFX by using TurboGrid. My idea is to mesh a linear cascade section and set the end wall (hub & tip) boundary to symmetry. (Ideally can the cascade span be wery short (2 cells?)). The problem is that when using turbogrid the hub and shroud will be swept and therefore not suited for a symmetry bundary. So is there any way to have straight endwalls in TurboGrid that can have symmetry boundary condition? Regards//Adde

August 21, 2016, 13:02		#4
Jack001 Member Jack Join Date: May 2015 Posts: 98 Rep Power: 11	Hi Far, Thanks for your reply - I'm not exactly sure how you mean - the only thing I can think of in terms of tricking TG to do it is to make a blade that is just 2D profiles stacked in 3D and then set the number of blades in the full annulus to something ridiculously high and scale up the the hub radius in order for the hub and shroud to have no curvature. Im not too sure about the robustness of this method though. Is that what you mean? Thanks! Last edited by Jack001; August 24, 2016 at 10:53.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[Gmsh] Extruded Meshing fails (Linear search / could not find extruded vertex)	Ijazu	OpenFOAM Meshing & Mesh Conversion	1	March 18, 2015 08:15
A turbulent test case for rhoCentralFoam	immortality	OpenFOAM Running, Solving & CFD	13	April 20, 2014 07:32
suitable boundary condition for scavenging process?	immortality	OpenFOAM Running, Solving & CFD	3	January 25, 2013 20:10
how to modify fvScheme to converge?	immortality	OpenFOAM Running, Solving & CFD	15	January 16, 2013 14:06
solution diverges when linear upwind interpolation scheme is used	subash	OpenFOAM	0	May 29, 2010 02:23

August 16, 2016, 18:39		#2
Jack001 Member Jack Join Date: May 2015 Posts: 98 Rep Power: 11	I am wondering this too. Any luck in finding if this is possible?

August 21, 2016, 12:57		#3
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	make the inlet and outlet as hub and casing. this way you can trick turbogrid and get the required mesh in it.