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Constriction Sizes

Asked by azim

Dear all,
I have a question about constriction sizes.
According to FlowEngine.getConstrictions(), a list consist of constriction radii (inscribed circle) is returned. I have a cube filling with particles (V=c^3,C=0.05 m) and my dimensions are according to SI units. when I get the maximum magnitude of Constriction radii, the answer is 0.09491 and it is not True according my model scales.
would you please tell me my mistake??
Thanks
Azim

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Best Chareyre (bruno-chareyre-9) said : 		#1

Hi, could you tell if the other values (not just max) look better?

Le jeu. 6 sept. 2018 23:22, azim <email address hidden> a
écrit :

> New question #673444 on Yade:
> https://answers.launchpad.net/yade/+question/673444
>
> Dear all,
> I have a question about constriction sizes.
> According to FlowEngine.getConstrictions(), a list consist of
> constriction radii (inscribed circle) is returned. I have a cube filling
> with particles (V=c^3,C=0.05 m) and my dimensions are according to SI
> units. when I get the maximum magnitude of Constriction radii, the answer
> is 0.09491 and it is not True according my model scales.
> would you please tell me my mistake??
> Thanks
> Azim
>
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Revision history for this message
azim (mirzavand) said : 		#2

Hi Bruno,
I got it, after sorting the list.
f[10%]=0.00018
.
.
.
f[80%]=0.00059
f[max]=0.09
Thank you

Revision history for this message
azim (mirzavand) said : 		#3

Thanks Chareyre, that solved my question.

Revision history for this message
Bruno Chareyre (bruno-chareyre) said : 		#4

> that solved my question

Mmmmh... not really "solved". 0.09 still makes no sense.
My guess is that the huge fictious spheres used to represent the boundaries are taken into account in the list of constrictions.
If it is the case you should have 8 similar values close to the max (8 corners of the box, or maybe 3x8 since each corner has 3 incident edges). If you can confirm that I may have a look and remove them from output.

Revision history for this message
azim (mirzavand) said : 		#5

Dear Bruno,
Thanks for you answer.
here is my model Constrictions after sorting the list. (last 25)

[ 0.0036319192177870904,
 0.0036404249128879447,
 0.0036518767944102447,
 0.003656707608473122,
 0.003656930037841711,
 0.0037063826093273397,
 0.003729854062654577,
 0.0037669276511747025,
 0.003793441372276753,
 0.0037996974571654625,
 0.0038486306246476075,
 0.004182415309382212,
 0.004257648985516027,
 0.004379541679861837,
 0.004829227199576033,
 0.004920777689663132,
 0.00512511884331911,
 0.00517874557047439,
 0.005200764806137889,
 0.005442797765111303,
 0.006750605490719739,
 0.007959830370085507,
 0.009036741646768476,
 0.01735400997956487,
 0.10969788358951041]

Revision history for this message
azim (mirzavand) said : 		#6

I said max=0.09 and here is max=0.109. (two different models!)

Revision history for this message
Bruno Chareyre (bruno-chareyre) said : 		#7

Thanks.
Not what I expected :(
There seem to be an erroneous value but I don't understand why.