Translate the pressure field on a cylinder side to a plane

rockzh · November 18, 2011, 23:55

The Geometry of the model is similar with a cylinder,and I get the pressure field on the side surface of the cylinder .For easier to analyse the 360 degree pressure field on the side ,how to make the pressure field be visual on a plane surface in CFX,or other Code(such as Tecplot)?
Thank you for your answer in advance!

Far · November 19, 2011, 11:54

This is one of the new features of Field View to unwrap the cylindrical surface to planer for visualization purposes.

rockzh · November 21, 2011, 22:20

how to do this?
Anyone can give an idea?

ghorrocks · November 22, 2011, 05:47

I do not think you can do this in CFD-Post. But you can do most of the hard work by defining a variable theta which is the angle around the body, and exporting theta, z and you variable to a file. You can then load it in anything (matlab, excel if you must or any other plotting program) and plot it as a 2D plot of theta versus z.

Far · November 22, 2011, 06:08

Not possible in CFD-Post
http://www.ilight.com/fieldview12.3_whatsnew.pdf. Here you will find the feature known as unrolled cylindrical surfaces.

brunoc · November 22, 2011, 14:32

Well,

If we're talking straight about surfaces of revolution than it might be possible to unwrap them using Turbo Post.

The down side is that you have to find equivalents for the turbo closed region (inlet, outlet, hub, shroud).
The up side is that if you don't have such regions you can provide Post with lines that represents them. These lines can be generated using polylines, for example.

If anyone claims this is not straightforward, I would totally agree. But if you don't have any other tool, than at least you have a way of plotting your data the way you want.

Cheers

ghorrocks · November 22, 2011, 17:31

Quote:

Not possible in CFD-Post

? I explained how you can export the data in a format from CFD-Post which should be readable in any 2D plotting program. While actually doing the plot is not possible in CFD-Post you can get it to do most of the hard work. It should be reasonably straight forward.

rockzh · November 23, 2011, 01:50

Thank you very much for every method.
I will try.

November 18, 2011, 23:55	Translate the pressure field on a cylinder side to a plane	#1
rockzh New Member Darren Zhang Join Date: Nov 2011 Location: China Posts: 20 Rep Power: 15	The Geometry of the model is similar with a cylinder,and I get the pressure field on the side surface of the cylinder .For easier to analyse the 360 degree pressure field on the side ,how to make the pressure field be visual on a plane surface in CFX,or other Code(such as Tecplot)? Thank you for your answer in advance!

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November 19, 2011, 11:54		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	This is one of the new features of Field View to unwrap the cylindrical surface to planer for visualization purposes.

November 21, 2011, 22:20		#3
rockzh New Member Darren Zhang Join Date: Nov 2011 Location: China Posts: 20 Rep Power: 15	how to do this? Anyone can give an idea?

November 22, 2011, 05:47		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	I do not think you can do this in CFD-Post. But you can do most of the hard work by defining a variable theta which is the angle around the body, and exporting theta, z and you variable to a file. You can then load it in anything (matlab, excel if you must or any other plotting program) and plot it as a 2D plot of theta versus z.

November 22, 2011, 06:08		#5
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	Not possible in CFD-Post http://www.ilight.com/fieldview12.3_whatsnew.pdf. Here you will find the feature known as unrolled cylindrical surfaces.

November 22, 2011, 14:32		#6
brunoc Senior Member Bruno Join Date: Mar 2009 Location: Brazil Posts: 277 Rep Power: 21	Well, If we're talking straight about surfaces of revolution than it might be possible to unwrap them using Turbo Post. The down side is that you have to find equivalents for the turbo closed region (inlet, outlet, hub, shroud). The up side is that if you don't have such regions you can provide Post with lines that represents them. These lines can be generated using polylines, for example. If anyone claims this is not straightforward, I would totally agree. But if you don't have any other tool, than at least you have a way of plotting your data the way you want. Cheers

November 23, 2011, 01:50		#8
rockzh New Member Darren Zhang Join Date: Nov 2011 Location: China Posts: 20 Rep Power: 15	Thank you very much for every method. I will try.