CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > General Forums > Main CFD Forum

discontinunous galerkin method

Register Blogs Community New Posts Updated Threads Search

Like Tree1Likes
  • 1 Post By Praveen. C

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 28, 2007, 22:56
Default discontinunous galerkin method
  #1
jack
Guest
 
Posts: n/a
hi guys who can tell me the advantage of Discontinunous galerkin method, has anyone already used this method in hypersonic flow?
  Reply With Quote

Old   July 29, 2007, 01:55
Default Re: discontinunous galerkin method
  #2
jinwon
Guest
 
Posts: n/a
It was good for handling of shock because it contains the characters of FVM as well as those of FEM. It's pretty close to the FVM in some sensors.
  Reply With Quote

Old   July 29, 2007, 15:02
Default Re: discontinunous galerkin method
  #3
Praveen. C
Guest
 
Posts: n/a
Some nice things I can remember about DGFEM, randomly listed.

High order schemes are easy to construct in a systematic way.

Order or accuracy can be varied from element to element (p-refinement)

Easier to use for hybrid approaches like RANS-LES since model can be varied from element to element.

hp-refinement is possible leading to use of optimal grid sizes

Very small stencil, each elements has to communicate with its immediately adjacent elements only. Good for parallellization. Simple communication pattern.

Fixed stencil irrespective of order of accuracy

Finite volume comes out as a low order version of DGFEM

Complex geometry - unstructured grids can be used

Discontinuous shape functions

* Upwind fl‚ux formulae can be used

* Conservative on each element

* Shock capturing scheme

* Any type(s) of element

* Hanging nodes OK - Cartesian grids

Block-diagonal mass matrix - decoupled between elements

No mass lumping required

Simple communication pattern: Good parallelizability
Quasar_89 likes this.
  Reply With Quote

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Code for Discontinuous Galerkin Method ? Ameya J Main CFD Forum 2 April 21, 2011 06:45
Navier stokes and the standard Galerkin method micheldup Main CFD Forum 0 March 1, 2011 10:24
Weak statement for Galerkin Method rugabug Main CFD Forum 0 March 26, 2010 20:19
Galerkin Method Applicable for Finite-Volume? Scott Main CFD Forum 0 September 7, 2008 20:02
Discontinuous Galerkin finite element method Tony Main CFD Forum 0 May 27, 2003 19:48


All times are GMT -4. The time now is 08:29.