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-   -   How to get level of free surface position? (http://www.cfd-online.com/Forums/fluent/101539-how-get-level-free-surface-position.html)

How to get level of free surface position?

Hi
I have simulated the free surface flow in a bend. Now, i want to visualize the free surface. for example, i want to get the free surface elevation along the outer wall of the bend. is there anyway to get this kind of data from fluent? or any kinds of data that can be used in excel or Tecplot. i need to plot the free surface elevation along the walls vs bend angle.

 Andrea1984 May 7, 2012 08:58

Hi,
what about to use the volume fraction isosurfaces?

Andrea

i could get the isosurface on outer or inner wall with volume fraction (of 0.5) but i do not know how to get the x,y and z of the points.

 Andrea1984 May 8, 2012 04:24

In Tecplot to you should be able to extract the isosurface as a zone; then you can export a data file which contains the variables of your interest.

i made a iso-surface of vof along the wall and exported the coordinates of the points to a text file. this can solve our present problem but i could not make a iso-surface of a vof value (vof=0.5) in whole the flow domain which will be a 3D surface.

 Andrea1984 May 23, 2012 04:01

In Tecplot you can create isosurfaces in the whole domain

 Sam-CFD October 4, 2012 01:01

X, Y and Z values in FLUENT Post

Once you create the isosurface (vol. frac. = 0.5) with a name (say, 'free-surface'), you can go to
File--> Export-->Solution Data
Choose ASCII format
You can choose Node or Cell data (choose node for larger data set to get smoother profile at the cost of an additional storage space)
Check the isosurface just created in Surfaces list
Select the quantity of interest from the Quantities list (you must select at least one quantity)
Click Write (and give an appropriate file name)

In the file that you just created, the X, Y and Z coordinates will be available along with the Quantity/ies that you had selected in a typical comma/space separated ASCII format.

Sam

Quote:
 Originally Posted by hadian (Post 362590) i made a iso-surface of vof along the wall and exported the coordinates of the points to a text file. this can solve our present problem but i could not make a iso-surface of a vof value (vof=0.5) in whole the flow domain which will be a 3D surface.

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