flowType

sersunzo · May 24, 2009, 19:00

Hi

does anybody know what the utility flowType (page 91 userguide) does?

Alessio

chiven · May 24, 2009, 22:32

"flowType Calculates and writes the flowType of velocity field U at each
time"

Are there some other problems?

alberto · May 25, 2009, 04:09

Hi Alessio,

it tells you if the flow is rotational (l = -1), a simple shear flow (l = 0) or a planar extensional flow (l = 1), where

l = (|D| - |omega|)/(|D| + |omega|)

with

D -> symm(gradU)
omega -> skew(gradU)

You can see the details of the implementation in flowType.C

Best,
Alberto

immortality · April 1, 2013, 17:11

what does this values for instance mean according to flowType?
they're not 0 or -+1:

Code:

0.07651246272745461
0.009874601375924783
0.4152505236808813
0.9556226864937011
0.9416049188595975
0.5856388528734834
0.2512780734589708
0.2002043050379488
0.2956873682252182
0.344476903828302
0.392744880848549
0.4422645731141795
0.5060221916933719
0.603670873234636
0.791199009088522
0.728309604866278
0.3407973861953704
0.9500353914061376
0.3114390527424502
0.1782654103206394
0.1555218835283287
0.162709215687532

May 24, 2009, 19:00	flowType	#1
sersunzo New Member Alessio Alexiadis Join Date: Mar 2009 Location: Birmingham, UK Posts: 16 Rep Power: 17	Hi does anybody know what the utility flowType (page 91 userguide) does? Alessio

May 25, 2009, 04:09		#3
alberto Senior Member Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,912 Rep Power: 36	Hi Alessio, it tells you if the flow is rotational (l = -1), a simple shear flow (l = 0) or a planar extensional flow (l = 1), where l = (\|D\| - \|omega\|)/(\|D\| + \|omega\|) with D -> symm(gradU) omega -> skew(gradU) You can see the details of the implementation in flowType.C Best, Alberto calim_cfd, sharonyue, salvo-K61IC and 1 others like this. __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

May 24, 2009, 22:32		#2
chiven Senior Member J. Cai Join Date: Apr 2009 Posts: 180 Rep Power: 17	"flowType Calculates and writes the flowType of velocity field U at each time" Are there some other problems?