Inferring a stream line plot

saisanthoshm88 · July 3, 2014, 19:50

I know that when stream lines are close it implies a region of high velocity and when the stream lines are far apart it implies a region of low velocity.

But when a stream line plot is made in CFD Post, the distribution of stream lines is just dependent on the number of points chosen in the settings.

So could someone please explain how to locate regions say sparsely populated with streamlines, I mean by doing away with this sensitivity to the number of points in the settings.

ghorrocks · July 3, 2014, 21:37

Why not just look at the velocity magnitude and see the areas of low velocity directly rather than inferring them from the streamlines?

Opaque · July 4, 2014, 08:51

You said

HTML Code:

I know that when stream lines are close it implies a region of high velocity and when the stream lines are far apart it implies a region of low velocity.

However, your statement is incomplete because it should stays the relation between the different stream lines. Based on your interpretation of the plots, your statement could have been reworded as

"when equally distributed stream lines (delta Psi = constant) are close it implies a region of high velocity and when the stream lines are far apart it implies a region of low velocity"

Martin_Sz · July 9, 2014, 03:05

you can define plane on the are which you intersted. ANd from this plane you can define streamlines

July 3, 2014, 19:50	Inferring a stream line plot	#1
saisanthoshm88 Senior Member --------- Join Date: Oct 2010 Posts: 303 Rep Power: 17	I know that when stream lines are close it implies a region of high velocity and when the stream lines are far apart it implies a region of low velocity. But when a stream line plot is made in CFD Post, the distribution of stream lines is just dependent on the number of points chosen in the settings. So could someone please explain how to locate regions say sparsely populated with streamlines, I mean by doing away with this sensitivity to the number of points in the settings. __________________ Best regards, Santhosh.

July 4, 2014, 08:51		#3
Opaque Senior Member Join Date: Jun 2009 Posts: 1,811 Rep Power: 32	You said HTML Code: I know that when stream lines are close it implies a region of high velocity and when the stream lines are far apart it implies a region of low velocity. However, your statement is incomplete because it should stays the relation between the different stream lines. Based on your interpretation of the plots, your statement could have been reworded as "when equally distributed stream lines (delta Psi = constant) are close it implies a region of high velocity and when the stream lines are far apart it implies a region of low velocity"

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July 3, 2014, 21:37		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,715 Rep Power: 143	Why not just look at the velocity magnitude and see the areas of low velocity directly rather than inferring them from the streamlines?

July 9, 2014, 03:05		#4
Martin_Sz Senior Member Marcin Join Date: May 2014 Location: Poland, Swiebodzin Posts: 232 Rep Power: 12	you can define plane on the are which you intersted. ANd from this plane you can define streamlines