Difference between structured & unstructured mesh

February 20, 2003, 00:10

Hi

What's the difference between structured mesh and unstructured mesh? Thanks.

Andrew

February 20, 2003, 05:41

Hi Andrew,
there are two levels you have to look at, when you want to decide about if a mesh is structured or not. A structured mesh can only be a hexahedron itself, where the parallel edges count the same number of nodes. When you connect these blocks together you get a block-structured mesh, which is still a structured mesh. But the shape is not sufficient for a structured mesh. It is also neccessary to look at the numering of the nodes. A code, which uses a structured mesh, needs special (structured) numbering (CFX-4). A tetrahedron mesh is, in general, unstructured. Nobody would create a structured mesh and then devide the hexas into tets. Did that help you?
Greetings, Marc

February 20, 2003, 09:40

Please see this previous posting :

http://www.cfd-online.com/Forum/main...cgi?read=12475

February 20, 2003, 00:10	Difference between structured & unstructured mesh	#1
Andrew Guest Posts: n/a	Hi What's the difference between structured mesh and unstructured mesh? Thanks. Andrew

February 20, 2003, 05:41	Re: Difference between structured & unstructured m	#2
Marc Guest Posts: n/a	Hi Andrew, there are two levels you have to look at, when you want to decide about if a mesh is structured or not. A structured mesh can only be a hexahedron itself, where the parallel edges count the same number of nodes. When you connect these blocks together you get a block-structured mesh, which is still a structured mesh. But the shape is not sufficient for a structured mesh. It is also neccessary to look at the numering of the nodes. A code, which uses a structured mesh, needs special (structured) numbering (CFX-4). A tetrahedron mesh is, in general, unstructured. Nobody would create a structured mesh and then devide the hexas into tets. Did that help you? Greetings, Marc

February 20, 2003, 09:40	Re: Difference between structured & unstructured m	#3
Smith Guest Posts: n/a	Please see this previous posting : http://www.cfd-online.com/Forum/main...cgi?read=12475

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Gambit problems	Althea	FLUENT	22	January 4, 2017 04:19
[Gmsh] 2D Mesh Generation Tutorial for GMSH	aeroslacker	OpenFOAM Meshing & Mesh Conversion	12	January 19, 2012 04:52
[ICEM] Unstructure Meshing Around Imported Plot3D Structured Mesh ICEM	kawamatt2	ANSYS Meshing & Geometry	17	December 20, 2011 12:45
Icemcfd 11: Loss of mesh from surface mesh option?	Joe	CFX	2	March 26, 2007 19:10
Mesh	Mignard	FLUENT	2	March 22, 2000 06:12