High order elements

pankos · January 31, 2011, 16:08

Hi. I want to use high order elements so that i can represent boundaries (wall) with good accuracy. I have seen some mesh generators which represent the boundary with 27-node hexahedral in order to describe the geometry with second order polynomial (3 nodes at each edge). Is there any way (64 or more nodes hex) for representation of more high order accuracy?

Jonas Holdeman · February 1, 2011, 08:56

Is there any way (64 or more nodes hex) for representation of more high order accuracy?

There is an 8-node hex Hermite element with 32 degrees-of-freedom (scalar & 3 first derivatives at each node) which is a complete cubic.

January 31, 2011, 16:08	High order elements	#1
pankos Member kostas Join Date: Jun 2010 Posts: 43 Rep Power: 15	Hi. I want to use high order elements so that i can represent boundaries (wall) with good accuracy. I have seen some mesh generators which represent the boundary with 27-node hexahedral in order to describe the geometry with second order polynomial (3 nodes at each edge). Is there any way (64 or more nodes hex) for representation of more high order accuracy?

February 1, 2011, 08:56		#2
Jonas Holdeman Senior Member Jonas T. Holdeman, Jr. Join Date: Mar 2009 Location: Knoxville, Tennessee Posts: 128 Rep Power: 18	Is there any way (64 or more nodes hex) for representation of more high order accuracy? There is an 8-node hex Hermite element with 32 degrees-of-freedom (scalar & 3 first derivatives at each node) which is a complete cubic. Last edited by Jonas Holdeman; February 1, 2011 at 09:01. Reason: correction

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
SECOND ORDER DON'T CONVERGE, WHY??????????	naus	FLUENT	10	March 13, 2006 07:21
boundary condition for high order Possion solver	jen	Main CFD Forum	0	November 16, 2005 19:04
boundary condition for high order possion solver NM	jen	Main CFD Forum	0	November 16, 2005 19:02
Volume 10 has higher order elements	Duncan	FLUENT	0	November 2, 2005 13:52
high aspect ratio elements	Olivier	CFX	5	April 3, 2003 06:55