To insert for each simulation (beside the Cf and the Reystrs comparison ...)

A table with:

Furthermore: picture of the eddy structures

SIMULATION SEM non iso Standard $ \sigma \le d_w $ $ \sigma_{MAX} \le d_w $ $ \sigma_{min} = \min(\Delta x, \Delta y, \Delta x) $ $ \sigma_{min} = \max(\Delta x, \Delta y, \Delta x) $ $ LES46 $ $ RANS $ 2 Y cell same res 2 Y res
DESCRIPTION  

Channel flow: $ 20 \pi \times 2 \times \pi $

Divisions: $ 500 \times 46 \times 82 $

Resolution: $ \Delta x^+ = 50 $, $ y^+ = 1 $, $ \Delta z^+ = 15 $

Length scale: $ \sigma = \max( \min( \frac{k^{3/2}}{\varepsilon}, \kappa \delta ), \Delta x, \Delta y, \Delta z) $

           
REPRODUCED REY STRS   inletReySIGMINyp1.png
LENGTH SCALES
FRICTION COEFF
k'          
UV UVProfx_0.0SEMnoniso.png        
EDDIES at 1st LOCATION                

Problem: the main results of last week is this one:

inletReySmallSigma.png

I exactly reproduced the Reynolds stresses but I used a mathematical trick: in here I set the length scale to be "small". As I had told you, the length scale works as a kind of filter and the DFSEM is not able to reproduce steep gradients. Shouldn't we find a limitation in agreement with the gradient?


Current Tags:
create new tag
, view all tags
Topic revision: r14 - 2012-03-19 - 12:58:27 - RuggeroPoletto
Main Web
15 Dec 2018

Site

Manchester CfdTm
Code_Saturne

Ongoing Projects

ATAAC
KNOO

Previous Projects

DESider
FLOMANIA

Useful Links:

User Directory
Photo Wall
Upcoming Events
Add Event
 

Computational Fluid Dynamics and Turbulence Mechanics
@ the University of Manchester
Copyright © by the contributing authors. Unless noted otherwise, all material on this web site is the property of the contributing authors.