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

Confusion about the turbulence spectrum used in DNS study.

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   June 22, 2018, 05:03
Default Confusion about the turbulence spectrum used in DNS study.
  #1
New Member
 
Junqian CAI
Join Date: Jul 2016
Location: Tianjin,China
Posts: 9
Rep Power: 9
acaist is on a distinguished road
Hello everyone!
I am interested in DNS study of turbulence and combustion. I am confused about the turbulence spectrum of Passot-Pouquet(1987) used in DNS study (Yoo). https://www.sciencedirect.com/scienc...1021801100040X.
In DNS study, the initial turbulent velocity is generated according to the spectrum present by Passot-Pouquet(1987)https://scholar.google.ca/scholar?q=...=1&oi=scholart, which looks like E(k)=A(k/k0)^4exp(-(k/k0)^2). This equation is different from the Kolmogorov’s −5/3 law. And they are look very different in same picture attached copy from a thesis. https://www.researchgate.net/publica...medium=organic.
My question is that why not use the spectrum of well known Kolmogorov’s −5/3 law in DNS study instead of use the spectrum proposed by Passot-Pouquet?
Any help would be appreciate.
acaist is offline   Reply With Quote

Reply

Tags
dns, kolmogorov’s, passot-pouquet, turbulence

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
Turbulence for transient study and a changing Reynolds number Shalash FLUENT 0 September 4, 2016 03:20
Displaying Turbulence Intensity in LES and creating a constant Turbulence Intensity Anwer FLUENT 1 August 8, 2016 16:59
Filtering DNS solutions Vs projecting filtered DNS solution juliom Main CFD Forum 5 May 19, 2016 16:06
Discussion: Reason of Turbulence!! Wen Long Main CFD Forum 3 May 15, 2009 09:52
Turbulence boundary values lego Main CFD Forum 0 October 24, 2002 13:47


All times are GMT -4. The time now is 23:16.