Thanks Sherwin, The workflow is clear to me now! On Thu, Feb 14, 2019 at 8:39 AM Amitvikram Dutta < amitvikram.dutta@uwaterloo.ca> wrote:

------------------------------ *From:* nektar-users-bounces@imperial.ac.ukOn Behalf OfSherwin, Spencer J *Sent:* February 14, 2019 8:39:13 AM (UTC-05:00) Eastern Time (US & Canada) *To:* Amitvikram Dutta *Cc:* nektar-users *Subject:* Re: [Nektar-users] Adding a non analytic velocity inlet profile

Hi Amit,

It is possible to specify a .fld file as a boundary condition. In the past I have used RANS data.

The process is that you need to extract the surface from your domain using Nekmesh with the -m extract module. You will need to specify the composite as an argument. I.e :surf=2

Once you have the surface you can get a set of x,y,z points from this surface using FieldConvert. You will then need to work out how to interpolate your data to these points. There is then a module to project the interpolated points back to a surface fld file. I do not recall this off the top of my head but it should be in the user guide.

Having successfully generates a surface fld file you can then specify this in the xml boundary condition. Rather than using

VALUE=“x*y”

You can specify

FILE=“myfile.fld”

Cheers, Spencer

Sent from my iPhone

On 14 Feb 2019, at 02:03, Amitvikram Dutta <amitvdutta23@gmail.com> wrote:

Hi all,

I'm re-asking a question I posed a few weeks ago since the email may have gotten lost in the clutter. Is it possible to add a non analytic profile to a boundary, if one does not have a .bc file. For example if One has experimental data on a series of points over a domain, would it be possible to interpolate that data to a boundary region of the mesh?

Sincerely, --

*Amitvikram Dutta*

Graduate Research Assistant

Fluid Mechanics Research Lab

Multi-Physics Interaction Lab

University of Waterloo

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--

*Amitvikram Dutta* Graduate Research Assistant Fluid Mechanics Research Lab Multi-Physics Interaction Lab University of Waterloo