plot water height = f(time)

idir · November 24, 2011, 04:35

Hello,

I made a simulation of free surface flow of water in a canal (in transient study ) and in post-processing i want to plot the water height according to time on the point defined by the intersection between line 1 and the isosurface in the canal (See Attachment).

- It was easy if we could create a point by intersection between line and isosurface!!

I do not see how I can do that knowing that I have not the height of water but I have the water volume fraction.

Thank you for helping me

ghorrocks · November 24, 2011, 07:03

You need to use a bit of lateral thinking.....

Generate a line from the bottom to the top of the domain at the location you wish to measure depth. Then do a line integral of water volume fraction. And there you have the water depth.

idir · November 24, 2011, 07:16

Thank you
but how can i do the line integral of water volume fraction ?
There is not the line integral function in CFX POST

idir · November 24, 2011, 07:25

Thank you it work
legthint(Water.Volume Fraction )@Line ;

November 24, 2011, 04:35	plot water height = f(time)	#1
idir New Member idir Join Date: Jun 2010 Posts: 10 Rep Power: 16	Hello, I made a simulation of free surface flow of water in a canal (in transient study ) and in post-processing i want to plot the water height according to time on the point defined by the intersection between line 1 and the isosurface in the canal (See Attachment). - It was easy if we could create a point by intersection between line and isosurface!! I do not see how I can do that knowing that I have not the height of water but I have the water volume fraction. Thank you for helping me Last edited by idir; November 24, 2011 at 10:26.

November 24, 2011, 07:03		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	You need to use a bit of lateral thinking..... Generate a line from the bottom to the top of the domain at the location you wish to measure depth. Then do a line integral of water volume fraction. And there you have the water depth. engrmansoor2534 likes this.

November 24, 2011, 07:25		#4
idir New Member idir Join Date: Jun 2010 Posts: 10 Rep Power: 16	Thank you it work legthint(Water.Volume Fraction )@Line ; engrmansoor2534 likes this. Last edited by idir; November 24, 2011 at 10:25.

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November 24, 2011, 07:16		#3
idir New Member idir Join Date: Jun 2010 Posts: 10 Rep Power: 16	Thank you but how can i do the line integral of water volume fraction ? There is not the line integral function in CFX POST