2D Mesh of Line Elements - Possible?

adjpayot · January 10, 2018, 12:57

Hello,

Is it possible to define a 2D mesh in SU2 entirely using line elements? i.e. Can I ommit defining the volumes in a .su2 mesh format and only define the edges?
This is because I need to run cutcell meshes which can include cells which are arbitrary polygons.

I am testing this out on a triangular mesh for which I have two versions:
- one where elements are triangles with the following format:
5 node1 node2 node3 triangle1

- one where elements are lines with the following format:
3 node1 node2 lines

The nodes and boundaries are then the same.

The mesh with the triangle elements runs fine but the one with the line elements crashes at the stage of "Read Grid File Information" with an OS error message but nor error failure message from the code. I'm including below the last lines of the output.

---------------------- Read Grid File Information -----------------------
Two dimensional problem.
7492 points.
2 surface markers.
407 boundary elements in index 0 (Marker = -1).
32 boundary elements in index 1 (Marker = -2).

fpalacios · February 24, 2018, 12:58

Nope... I don't think it is possible, but if are looking to reproduce a classical 1D simulation (like Sod's tube) it is easy to create a 2D grid that behaves like a 1D one (two points in the y direction).
Best,
Francisco

January 10, 2018, 12:57	2D Mesh of Line Elements - Possible?	#1
adjpayot New Member Alexandre Payot Join Date: Jan 2018 Posts: 1 Rep Power: 0	Hello, Is it possible to define a 2D mesh in SU2 entirely using line elements? i.e. Can I ommit defining the volumes in a .su2 mesh format and only define the edges? This is because I need to run cutcell meshes which can include cells which are arbitrary polygons. I am testing this out on a triangular mesh for which I have two versions: - one where elements are triangles with the following format: 5 node1 node2 node3 triangle1 - one where elements are lines with the following format: 3 node1 node2 lines The nodes and boundaries are then the same. The mesh with the triangle elements runs fine but the one with the line elements crashes at the stage of "Read Grid File Information" with an OS error message but nor error failure message from the code. I'm including below the last lines of the output. ---------------------- Read Grid File Information ----------------------- Two dimensional problem. 7492 points. 2 surface markers. 407 boundary elements in index 0 (Marker = -1). 32 boundary elements in index 1 (Marker = -2).

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February 24, 2018, 12:58		#2
fpalacios Super Moderator Francisco Palacios Join Date: Jan 2013 Location: Long Beach, CA Posts: 404 Rep Power: 15	Nope... I don't think it is possible, but if are looking to reproduce a classical 1D simulation (like Sod's tube) it is easy to create a 2D grid that behaves like a 1D one (two points in the y direction). Best, Francisco