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How to export velocity profile and load it as inlet condition

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Old   November 16, 2011, 18:40
Default How to export velocity profile and load it as inlet condition
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Yingying Wang
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I am using ANSYS Fluent 13.0 to model a 3D microchannel fluid and heat transfer. Anyone can tell me how to input hydrodynamic fully developed flow as inlet flow condition? I want to extract the 3D velocity profile from another FLUENT calculation and load the velocity file as the input, but I don't know how to get the velocity file. I read some tutorial saying the velocity file can be obtained as a file format of "XY".
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Old   November 16, 2011, 19:47
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raj
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In Fluent, Solution XY plot and write to file, the variable you are interested in...

While reading the boundary condition, you can read as a profile instead of constant.
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Old   November 17, 2011, 08:13
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Emre G
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write the file by xy plot, u hav to select a face wher you want to get an profile.
be careful, the upper values in the exported profile file represents 'x , y, and z' coordinates respectively. The last column values are the magnitudes (or etc) that u hav just taken on the surface...

Now u can give these profiles to ur face by importing profiles first, then u can select this in the boundary condition window-->velocity (or other)
instead of giving constant velocity profile.

enjoy.
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Old   November 17, 2011, 18:29
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Zachariah Swetky
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You also have the ability to export a profile from File>Export>Profile... This will take you through a dialog where you select quantities and surfaces to export. You can then import this into the next case.
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Old   February 7, 2013, 07:19
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Oscar Albo
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Quote:
Originally Posted by swetkyz View Post
You also have the ability to export a profile from File>Export>Profile... This will take you through a dialog where you select quantities and surfaces to export. You can then import this into the next case.
Hi swetkyz

I have a question: if I want to export a velocity outlet profile from fluent and then import also in fluent, when u mentioned that this dialog comes up, in which format do I have to export it? I see Abaquis, ASCII but no fluent....

thanks!
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Old   February 7, 2013, 10:23
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Zachariah Swetky
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Originally Posted by Alro View Post
Hi swetkyz

I have a question: if I want to export a velocity outlet profile from fluent and then import also in fluent, when u mentioned that this dialog comes up, in which format do I have to export it? I see Abaquis, ASCII but no fluent....

thanks!
Hi Alro,

It is simply File>Export>Profile. This allows you to export data for any quantity on any surface in a ".prof" format. From there, you start your next simulation, and in the Boundary Conditions tab, select the surface you want to apply the profile to. Once selected, you just hit the "Profiles..." button on the same tab, and it is self-explanatory from there.

Hope that helps.
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Old   May 8, 2013, 15:26
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Heini Rasmussen
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Is it possible to collect a mean of a outlet profile from a transient analysis and use this for a inlet profile in a steady state analysis?
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Old   November 8, 2013, 10:55
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Tamara Annabelle
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I have a similar question: Is it also possible to export a velocity profile at a certain cross-section (resp. a simple line in a 2D model) in CFD-Post?
Thanks for your help!
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Old   August 18, 2014, 07:52
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Pavel
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Hi Marabelle,

It is possible to export the velocity/other parameters from a certain cross section. I run an analysis for the seabed and extracted the velocity from the layers above.
You can use Insert-> Location-> User surface and in the method field you can use transformed or Offset ... this will offset your surface and then you can create a contour etc for this new surface and then File-> Export.
Not sure about 2D line as you mentioned - you can use the data from 3D and process it (find the values you are interested in). there might be a way to export only those you want ....

hope this helps!
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Old   April 11, 2015, 09:55
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Lida
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hi
I have a similar problem. I want to use the velocity outlet of a flow in a pipe for inlet boundary condition of another pipe. my geometry is a 2D one. but when I want to export I can't find the term "profile" or sth by a ".prof" format as is shown in the picture. can anyone help me and explain what exactly I should do?
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Old   April 16, 2015, 00:19
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hi
I have a similar problem. I want to use the velocity outlet of a flow in a pipe for inlet boundary condition of another pipe. my geometry is a 2D one. but when I want to export I can't find the term "profile" or sth by a ".prof" format as is shown in the picture. can anyone help me and explain what exactly I should do?
You should use File>Export>Profile
from the image it seems you are using export solution data.
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