[Nek5000-users] pipe prenek
nek5000-users at lists.mcs.anl.gov
nek5000-users at lists.mcs.anl.gov
Wed Oct 18 07:18:45 CDT 2017
Dear ZJ,
In order to parse the characters in the line, nek uses formatted reads for
curve sides and for BC info.
The format changes as the number of elements increases in order to accommodate the larger integers (i.e., the element number) in the same line,
so you have to check either the reader source or prenek source or a valid
.rea file to see what that formatting looks like.
I've fixed your pipe mesh here. Note that there is a 2D pipe mesh (but with a different base template) in NekExamples/pipe/w2dcyl020a.rea
Paul
________________________________
From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Wednesday, October 18, 2017 4:48:38 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] pipe prenek
Hi Nek,
Is there anyone knows how to calculate the curvature in .rea file. Recently, I want to generate a pipe mesh but it doesn't seem like a pipe in which I guess there is something wrong in curvature part in .rea file. I have attached the mesh part below.
**MESH DATA** 1st line is X of corner 1,2,3,4. 2nd line is Y.
12 2 12 NEL,NDIM,NELV
ELEMENT 1 [ 1A] GROUP 0
0.000000 0.350000 0.250000 0.000000
0.000000 0.000000 0.250000 0.350000
ELEMENT 2 [ 1B] GROUP 0
0.500000 0.353554 0.250000 0.350000
0.000000 0.353554 0.250000 0.000000
ELEMENT 3 [ 1C] GROUP 0
0.000000 0.000000 0.250000 0.353554
0.500000 0.350000 0.250000 0.353554
ELEMENT 4 [ 1A] GROUP 0
0.000000 0.000000 0.250000 0.350000
0.000000 -0.350000 -0.250000 0.000000
ELEMENT 5 [ 1B] GROUP 0
0.000000 0.353554 0.250000 0.000000
-0.500000 -0.353554 -0.250000 -0.350000
ELEMENT 6 [ 1C] GROUP 0
0.500000 0.350000 0.250000 0.353554
0.000000 0.000000 -0.250000 -0.353554
ELEMENT 7 [ 1A] GROUP 0
0.000000 -0.350000 -0.250000 0.000000
0.000000 0.000000 -0.250000 -0.350000
ELEMENT 8 [ 1B] GROUP 0
-0.500000 -0.353554 -0.250000 -0.350000
0.000000 -0.353554 -0.250000 0.000000
ELEMENT 9 [ 1C] GROUP 0
0.000000 0.000000 -0.250000 -0.353554
-0.500000 -0.350000 -0.250000 -0.353554
ELEMENT 10 [ 1A] GROUP 0
0.000000 0.000000 -0.250000 -0.350000
0.000000 0.350000 0.250000 0.000000
ELEMENT 11 [ 1B] GROUP 0
0.000000 -0.353554 -0.250000 0.000000
0.500000 0.353554 0.250000 0.350000
ELEMENT 12 [ 1C] GROUP 0
-0.500000 -0.350000 -0.250000 -0.353554
0.000000 0.000000 0.250000 0.353554
***** CURVED SIDE DATA *****
8 Curved sides follow IEDGE,IEL,CURVE(I),I=1,5, CCURVE
1 2 0.50000 0.00000 0.00000 0.00000 0.00000 C
4 3 0.50000 0.00000 0.00000 0.00000 0.00000 C
1 5 0.50000 0.00000 0.00000 0.00000 0.00000 C
4 6 0.50000 0.00000 0.00000 0.00000 0.00000 C
1 8 0.50000 0.00000 0.00000 0.00000 0.00000 C
4 9 0.50000 0.00000 0.00000 0.00000 0.00000 C
1 11 0.50000 0.00000 0.00000 0.00000 0.00000 C
4 12 0.50000 0.00000 0.00000 0.00000 0.00000 C
Kind regards,
ZJ
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