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how draw polyline in fluent

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Old   March 23, 2020, 08:18
Default how draw polyline in fluent
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Hi Dears
I made the shell that contain two wings for part of my project.now i am in this step that i want make a polyline as shown in figure.i want to know how i can draw this front polyline on my shell in ansys fluent?
my goal is to plot CP for this polyline against degree as shown in figure 2.
Thank you in advance
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File Type: png diagram.PNG (99.5 KB, 13 views)
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Old   March 23, 2020, 10:17
Default Polyline
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These kind of lines are easily plotted using iso-surfaces in Fluent. Assuming that the axis of the duct is aligned with z-axis, the line is nothing but the intersection of a plane at a particular value of z-coordinate and the surface on which you want polyline. Use Surfaces > Iso-Surface > Mesh and then select the coordinate that is aligned with the axis of the duct. Provide a value to define a plane within which polyline should lie. Select the surface on which it should lie. Create.
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Old   March 27, 2020, 11:30
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Hi dear vinerm.
thank you for your advise
sorry for delay.i was trying to solve the problem.
i tried your idea,but in this way the plane that cut my shell(X is my shell central axis) make two polyline for me(as shown in figure 2) while i need only outer polyline that out face of my shell.this is happening becuse of my shell has thicknes.
i know i should split my shell surface into outer and inner surface and choose outer surface when i am using iso-surface,but i cant do it in ICEM-CFD(i use this application for my meshing).
do you have any idea?
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File Type: jpg figure 2.jpg (58.3 KB, 11 views)
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Old   March 27, 2020, 11:46
Default Iso-Clip
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Once you have generated the iso-surface containing two lines, you can further clip this iso-surface into two using iso-clip option. Use radial coordinate to clip these.
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Old   March 28, 2020, 08:17
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hello again and thank you
when i use radial coordinates on my polyline it just clip part of both inner and outer polylines(otherwise it acts like angular coordinates)and polyline become like figure 3.
i am not sure what is problem.
i need just outer circle
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Old   March 28, 2020, 15:25
Default Radial Coordinate
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That's because radial coordinate is not a primitive coordinate system. It is defined based on the cell zone conditions. You have to ensure that the axis direction and origin are properly defined in the cell zone conditions for accurate determination of radial coordinates.
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Old   March 29, 2020, 08:57
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Hello Dear vinerm.
Thank your for your reply.
I attached my geometry ( a cylinder that in my domain For Fluid and shell that is my solid) as you can see X-axis is my cylindrical axis.
also my domain is station so how i should set values in set up for fluid(i also attach this picture too).
thank you in advance
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File Type: png setup for fluid zone.PNG (27.4 KB, 11 views)
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Old   March 30, 2020, 03:46
Default Mesh Orientation in Fluent
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If you did not do any mesh transformation in Fluent, then you need to use (0 0 1) for rotation axis. As far as origin is concerned, you have to check it yourself if really the axis passes through (0 0 0) or not.
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