[ami]

I am totally new to CFX. I am trying to simulate NACA 0012 with CFX. As the first step, I am trying to import the coordinates of NACA 0012 to DesignModeler in order to make the geometry. Can anybody help me about the format of the file and how I can import it?
Thank you very much.
Ami

[AliTr]

this is the sample file format I copied from CFX help:

#------------------------------------------------------------
# List of Point Coordinates
# Format is: integer Group, integer ID, X, Y, Z
# all delimited by spaces, with nothing after the Z value.
# Group 1
1 1 20.1234 25.4321 30.5678
1 2 25.2468 30.1357 35.1928
1 3 15.5555 16.6666 17.7777
#Group 2
2 1 50.0101 100.2021 7.1515
2 2 -22.3456 .8765 -.9876
2 3 21.1234 22.4321 23.5678
#------------------------------------------------------------

make a text file with above format, then to import into design modeller,goto [Create] menu -> Point
and select the file you've just created.

[akiraglory]

Hi, i tried to input this coordinate file, but an error keeps appear.

May I know where is my mistake?

#group 1
1 1 1.0000000 0.0000000 0
1 2 0.9999377 0.0000196 0
1 3 0.9997508 0.0000782 0
1 4 0.9994394 0.0001760 0
1 5 0.9990034 0.0003128 0
1 6 0.9984431 0.0004885 0
1 7 0.9977586 0.0007031 0
1 8 0.9969501 0.0009565 0
1 9 0.9960177 0.0012486 0
1 10 0.9949617 0.0015793 0
1 11 0.9937823 0.0019485 0
1 12 0.9924798 0.0023562 0
1 13 0.9910547 0.0028020 0
1 14 0.9895071 0.0032851 0
1 15 0.9878376 0.0038051 0
1 16 0.9860464 0.0043617 0
1 17 0.9841341 0.0049547 0
1 18 0.9821012 0.0055835 0
1 19 0.9799482 0.0062463 0
1 20 0.9776754 0.0069424 0
1 21 0.9752837 0.0076717 0
1 22 0.9727736 0.0084323 0
1 23 0.9701455 0.0092221 0
1 24 0.9674004 0.0100406 0
1 25 0.9645387 0.0108858 0
1 26 0.9615613 0.0117548 0
1 27 0.9584688 0.0126468 0
1 28 0.9552621 0.0135583 0
1 29 0.9519419 0.0144866 0
1 30 0.9485090 0.0154300 0
1 31 0.9449645 0.0163851 0
1 32 0.9413090 0.0173532 0
1 33 0.9375435 0.0183325 0
1 34 0.9336690 0.0193243 0
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1 48 0.8685645 0.0349934 0
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1 397 0.9999377 0.0000144 0

[AliTr]

Originally Posted by akiraglory

Hi, i tried to input this coordinate file, but an error keeps appear.

what's the error?

[akiraglory]

I have found the cause of the error, there are two items with same id,

1 105 0.4645093 0.0980543 0
1 105 0.4566405 0.0984177 0

manual key in really cause alot of hassle

[niket_thatsme]

Hello, I am a newbie. I am also trying to insert coordinates of Selig 1223 RTL, eppeler, etc. though the above comments are useful, I would just like to clarify one thing. Is the grouping of the coords based upon lower surface and the upper surface ?

Thanks for any help !

[Filankes]

Originally Posted by akiraglory

Hi, i tried to input this coordinate file, but an error keeps appear.

May I know where is my mistake?

Dude, maybe you need some info about Excel?

manual input, of so many points is not that good idea.

u can exprot files from excel!!! to .txt extention

[natur3]

Hi,

I would like to know whether Ansys is able to support exponetial format.

As in my text file, i specified it to be %g.

Because my data value is too small, if i use %f, it will truncate to 0.

Best Regards,
natur3

[sharkforce]

I am doing a similar thing, importing coordinates and I can do that just fine, but how can I use these new points in a sketch? they seem completely separated and cannot be snapped to with lines. I can construct lines from points but i cant select those lines inside a sketch either.

[Tonnedi]

Hi all,

I cannot manage to import the .txt file, with the format given above, in order to insert some points...

I am working with Ansys version 13.0. I can go to Ansys Main Menu > Preprocessor > Modelling > Create > Keypoints (?) > ..?.. Then I can't find the right window to browse and import my file.

Also tried to import the text file via File > Read input from ... But this didn't work either.

Can someone help me? Many thanks!

[ghorrocks]

Try the ANSYS geometry and meshing forum.

[shubham jain]

I successfully imported the coordinates of NACA 0012.

I need to import the coordinates of airfoil with some extrusion or protuberance. actually i want to import the coordinates of airfoil with gurney flap.
Do I have to change the group of the points in .txt file or something else??

Kindly help

[rohitme]

i am using fluent and i have excel file of nozzle geometry but i want to generate that geometry in ansys fluent so how i genrate text file from that excel file

[shubham jain]

to generate txt file from excel, save the excel file as ".txt (tab delimited)" format to import the geometry into ansys.
u will need specific format of coordinates depending upon whether u are creating ur geomtery in Design Modeler or in ICEM CFD

[sivakumar]

Hi Guys,
I am learning ansys DM, I have a fan coordinate points and modified it according to ansys text format, then

create --> points --> .txt file which I created, I am able to see the points in DM.

When I try to connect the points using spline, I couldn’t find the spline option in the sketch tap.

how to get spline in DM or is there any other option?

Thanks,
Sivakumar

[sivakumar]

Sorry for the post I got it,

it is under concept --> 3Dcurve (select Point select as definition) then select the points.

Thanks,
sivakumar

[dreamz]

I was successful in importing the co-ordinates of naca0015, as mentioned in this post. I created a 3D curve out of it. In the part, bodies it shows line body. When I click on it, it shows that the cross-section is not defined. May I know how to define this?

Another thing, I want to analyse flow over this airfoil in 2D. So, I need to create a rectangular domain over it. Then, I need to subtract the airfoil from this domain. However, the boolean option does not select this line body as the tool body. Also, I am not able to create a surface from this curve. How should I go about it?

[shubham jain]

@dreamz:
make sure ur line body is making a closed curve.
surface can only be generated by closed curve. then apply boolean

and for 0015... is zero camber airfoil so i think C-type domain (instead of rectangular domain) can also be good and easy for u

[dreamz]

@shubham

Please see the attachment. in the last line i had put

1 0 as mentioned in one of the post on this fourm.http://www.cfd-online.com/Forums/ansys-meshing/113097-import-3d-curve-txt.html


I could not create a surface from the 3D curve.

[shubham jain]

first of all.. try to get more points..they are just 35 points.
try to get atleast 100 points from some online airfoil generator.

second, yes, u need to put 1 0 in last point, to make a closed curve.

try this attached file and check what is the difference in your file and mine, and let me know!!!