plot contour on a plane

1988 · August 11, 2014, 05:53

hi
I want to plot velocity contour along an specific axis ,I mean I have two axis (X and Y) and Fluent gives me U (x velocity) and V (y velocity)contours but I want to plot velocity contour on a plane which has made 45 degree angel with x axis.
in other word ,on the axis which has 45 degree angel with X or Y axis.
Thanks alot

1988 · August 13, 2014, 03:18

no body knows what to do?!!!

pakk · August 13, 2014, 06:42

First make up your mind.

Do you want to plot the velocity on an axis, or on a plane? You keep switching between those two as if they are the same, but they are not. An axis is one-dimensional, a plane is two-dimensional. What do you want?

tarjeiba · August 13, 2014, 07:40

If you want the absolute velocity as a contour on a plane perpendicular to the [1, -1, 0] vector (i.e. directed 45 degrees from x away from y), you can create this surface in the Surface -> Planar Surface (if memory serves) and choose point and normal (or whatever way you want to specify it). Subsequently you can follow the normal procedure to create an iso-contour on this newly created surface.

However, if what you want is the velocity component along this plane, you need to create a new field variable where this is calculated from the three velocity components u, v, and w. Let me know if this is what you have in mind.

Good luck!

1988 · August 13, 2014, 10:09

Hello and thanks for your answer.
In this photo 1,you can see what I am looking for
.As you see , I have different planes that I made them in this way :
surface--plane--select points
the problem is I want to plot velocity contour (axial velocity) in this planes. As you can see in photo 2 ,there is a F vector in each section (the normal of the plane)that coming out of plane and I want to plot velocity contour in F direction and it is called an axial velocity contours.
In photo 3 ,it is obvious that an axial velocity contours has negative and positive quantities so is there any idea how can I make it?
I am using Fluent 6.3.26 and I did not find this steps which Tarjeiba said.If you use another version of fluent which I have to use to plot this contours just let me know.
thanks alot

pakk · August 13, 2014, 10:24

Isn't the third photo exactly what you want to have? Or do I understand it wrong?

1988 · August 14, 2014, 01:54

yes you are right,the third photo is what I exactly want, so could you please help?!

pakk · August 14, 2014, 02:41

I am confused, you already have what you want... If figure 3 is what you want, and you already have figure 3, you are done, aren't you?

1988 · August 14, 2014, 06:51

these are an article's results and I want to do the same,picture 3 is not mine but I want to make these contours.

pakk · August 14, 2014, 07:03

Okay, that makes sense

I guess you can do this with the next three steps:

Step 1: Define a plane. (you already did this).
Step 2: In the cell zone conditions, define the rotation-axis direction as the normal to your plane. (for example [1, -1, 0])
Step 3: Plot the Axial velocity on the plane.

(This is from memory, so some things might have slightly different names.)

If you want to do this on five planes, you have to do this five times. There might be a smarter way, but this is the best I can come up with. Good luck!

August 11, 2014, 05:53	plot contour on a plane	#1
1988 Senior Member Ali reza Join Date: Mar 2014 Posts: 110 Rep Power: 12	hi I want to plot velocity contour along an specific axis ,I mean I have two axis (X and Y) and Fluent gives me U (x velocity) and V (y velocity)contours but I want to plot velocity contour on a plane which has made 45 degree angel with x axis. in other word ,on the axis which has 45 degree angel with X or Y axis. Thanks alot

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August 13, 2014, 03:18		#2
1988 Senior Member Ali reza Join Date: Mar 2014 Posts: 110 Rep Power: 12	no body knows what to do?!!!

August 13, 2014, 06:42		#3
pakk Senior Member Join Date: Nov 2013 Posts: 1,965 Rep Power: 26	First make up your mind. Do you want to plot the velocity on an axis, or on a plane? You keep switching between those two as if they are the same, but they are not. An axis is one-dimensional, a plane is two-dimensional. What do you want?

August 13, 2014, 07:40		#4
tarjeiba New Member Tarjei Join Date: Aug 2013 Posts: 19 Rep Power: 13	If you want the absolute velocity as a contour on a plane perpendicular to the [1, -1, 0] vector (i.e. directed 45 degrees from x away from y), you can create this surface in the Surface -> Planar Surface (if memory serves) and choose point and normal (or whatever way you want to specify it). Subsequently you can follow the normal procedure to create an iso-contour on this newly created surface. However, if what you want is the velocity component along this plane, you need to create a new field variable where this is calculated from the three velocity components u, v, and w. Let me know if this is what you have in mind. Good luck!

August 13, 2014, 10:24		#6
pakk Senior Member Join Date: Nov 2013 Posts: 1,965 Rep Power: 26	Isn't the third photo exactly what you want to have? Or do I understand it wrong?

August 14, 2014, 01:54		#7
1988 Senior Member Ali reza Join Date: Mar 2014 Posts: 110 Rep Power: 12	yes you are right,the third photo is what I exactly want, so could you please help?!

August 14, 2014, 02:41		#8
pakk Senior Member Join Date: Nov 2013 Posts: 1,965 Rep Power: 26	I am confused, you already have what you want... If figure 3 is what you want, and you already have figure 3, you are done, aren't you?

August 14, 2014, 06:51		#9
1988 Senior Member Ali reza Join Date: Mar 2014 Posts: 110 Rep Power: 12	these are an article's results and I want to do the same,picture 3 is not mine but I want to make these contours.

August 14, 2014, 07:03		#10
pakk Senior Member Join Date: Nov 2013 Posts: 1,965 Rep Power: 26	Okay, that makes sense I guess you can do this with the next three steps: Step 1: Define a plane. (you already did this). Step 2: In the cell zone conditions, define the rotation-axis direction as the normal to your plane. (for example [1, -1, 0]) Step 3: Plot the Axial velocity on the plane. (This is from memory, so some things might have slightly different names.) If you want to do this on five planes, you have to do this five times. There might be a smarter way, but this is the best I can come up with. Good luck!