Velocity in crosssection

Diger · November 5, 2015, 09:33

Say I have finished my simulation and already visualized and stuff.
Now in one part of it I want to know the velocity distribution of a crosssection of a specific element of the body.
Would I have had to define the plain prior in the modeller or mesh or can I still get the result posterior?

edit: sorry,ok I found the plane option. Though I cant really figure out what the difference between clip plane is?!

fresty · November 5, 2015, 10:02

It depends reasonably on the CFD package you are using (so it could be more precise if you mention the one you're using) but in most of them it should be pretty convenient in post processing modules without any pre-definition... you could create a plane anywhere in the domain and observe results/ distribution on it..

Diger · November 5, 2015, 10:03

yeah sorry I'm using CFD Post, is that correct?
Now I figured plane, though what is the difference to clip plane?

fresty · November 5, 2015, 10:12

Clip plane is a graphical cross section of your model not the plane which represents a location to observe the results..

Diger · November 5, 2015, 11:28

So is it possible to 3d Plot the actual values of the selected plane or can u only view them by color code?
edit: 2d plot a cut of the 2d plane would also be enough.

fresty · November 5, 2015, 14:56

i am not sure if i understood your question clearly as the terms you refer to are pretty generic.. if by 3D plot you mean the velocity vectors then that's achievable by selecting the created plane as the location..
one effective option for 3D plot would be is to go to file> export and select your created 2D plane and select the desired velocity variable from the given list.. this would generate a spreadsheet with X, Y, Z coordinates and respective velocity values.. this of course can then be 3D plotted in excel itself..
if you intend to observe a chart/ graph of the values on the created plane in CFD post itself then then I guess you would need to have a cluster of points or individual points distributed/ patterned on the plane, later selected in chart option to see the respective values.. using a probe would also be a crude but another option none the less..

Diger · December 5, 2015, 07:50

Havent looked into this for long...
Btw: Are the export units always SI? like m,kg,s?
I specified mm,g,s when building the layout but he seems to use m,kg,s as output?

November 5, 2015, 09:33	Velocity in crosssection	#1
Diger Senior Member Join Date: Nov 2015 Posts: 135 Rep Power: 10	Say I have finished my simulation and already visualized and stuff. Now in one part of it I want to know the velocity distribution of a crosssection of a specific element of the body. Would I have had to define the plain prior in the modeller or mesh or can I still get the result posterior? edit: sorry,ok I found the plane option. Though I cant really figure out what the difference between clip plane is?!

December 5, 2015, 07:50		#7
Diger Senior Member Join Date: Nov 2015 Posts: 135 Rep Power: 10	Havent looked into this for long... Btw: Are the export units always SI? like m,kg,s? I specified mm,g,s when building the layout but he seems to use m,kg,s as output? Last edited by Diger; December 5, 2015 at 09:36.

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November 5, 2015, 10:02		#2
fresty Senior Member Join Date: Aug 2014 Location: UK Posts: 213 Rep Power: 12	It depends reasonably on the CFD package you are using (so it could be more precise if you mention the one you're using) but in most of them it should be pretty convenient in post processing modules without any pre-definition... you could create a plane anywhere in the domain and observe results/ distribution on it..

November 5, 2015, 10:03		#3
Diger Senior Member Join Date: Nov 2015 Posts: 135 Rep Power: 10	yeah sorry I'm using CFD Post, is that correct? Now I figured plane, though what is the difference to clip plane?

November 5, 2015, 10:12		#4
fresty Senior Member Join Date: Aug 2014 Location: UK Posts: 213 Rep Power: 12	Clip plane is a graphical cross section of your model not the plane which represents a location to observe the results..

November 5, 2015, 11:28		#5
Diger Senior Member Join Date: Nov 2015 Posts: 135 Rep Power: 10	So is it possible to 3d Plot the actual values of the selected plane or can u only view them by color code? edit: 2d plot a cut of the 2d plane would also be enough.

November 5, 2015, 14:56		#6
fresty Senior Member Join Date: Aug 2014 Location: UK Posts: 213 Rep Power: 12	i am not sure if i understood your question clearly as the terms you refer to are pretty generic.. if by 3D plot you mean the velocity vectors then that's achievable by selecting the created plane as the location.. one effective option for 3D plot would be is to go to file> export and select your created 2D plane and select the desired velocity variable from the given list.. this would generate a spreadsheet with X, Y, Z coordinates and respective velocity values.. this of course can then be 3D plotted in excel itself.. if you intend to observe a chart/ graph of the values on the created plane in CFD post itself then then I guess you would need to have a cluster of points or individual points distributed/ patterned on the plane, later selected in chart option to see the respective values.. using a probe would also be a crude but another option none the less..