CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

time stepping schemes for compressible DNS/LES

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   January 14, 2010, 23:15
Default time stepping schemes for compressible DNS/LES
New Member
Join Date: Apr 2009
Posts: 29
Rep Power: 16
shyamdsundar is on a distinguished road

I have a general doubt with compressible DNS/LES codes. Explicit schemes model both the length and time scales accurately while implicit schemes might not represent the time scales accurately due to large CFL. Besides, many implicit schemes are only second or 3rd order accurate. In case of DNS or LES where both length and time scales might be important, I am wondering which one should I choose. A lower CFL would naturally favor explicit schemes.

If one wants to develop an efficient unstructured higher order LES code based on DG, which one of the time stepping schemes is preferable?

Explicit (like RK-DG schemes)
Implicit ( Dual time stepping, etc. )
Explicit-Implicit (implicit near boundary, explicit at coarser grids)
Explicit-Explicit (variable time steps)

Thanks in advance for your reply.

shyamdsundar is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Superlinear speedup in OpenFOAM 13 msrinath80 OpenFOAM Running, Solving & CFD 18 March 3, 2015 05:36
How to write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33
local time stepping and pseudo time phil Fidelity CFD 0 February 27, 2006 16:26
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 18:07
Dual Time Stepping Method X. Ye Main CFD Forum 1 September 23, 1999 04:05

All times are GMT -4. The time now is 20:07.