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pressure value out of domain!

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Old   July 26, 2013, 08:34
Exclamation pressure value out of domain!
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I'm simulating a weir in a channel. I want to read pressure in some specific points. I draw a line with "cut" option then I read pressure at the first point of the line but I noticed that there are some pressure values below this point out of the domain. How is it possible?! what's the problem?
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Old   July 27, 2013, 07:26
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The cut option is giving you a value at every point that curve cuts a control volume boundary face.
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Old   July 27, 2013, 16:22
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Quote:
Originally Posted by ghorrocks View Post
The cut option is giving you a value at every point that curve cuts a control volume boundary face.
I know that but I can also read pressure values by probe tool. how is it possible to exist values for pressure out of domain?!
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Old   July 28, 2013, 07:43
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It is interpolating from the control volume points to the locations you are specifying. The interpolation is not perfect and can result in locally strange results.
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Old   July 28, 2013, 10:41
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alternative is to create a contour on X, Y, Z, or theta on a plane or iso surface. If this gives a contour line where you are interested, create a polyline from this contour line and see if the problem remains.
or create a polyline from a boundary intersection.
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Old   July 29, 2013, 03:30
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thank you all.
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