[Nek5000-users] Object definition for surface integrals

[nek5000-users at lists.mcs.anl.gov]

Dear Prof. Fischer


Thanks for the detailed reply. I will use your description and understand
the relevant subroutines of navier5.f routine in detail.


Regards,
Ravi


On Mon, May 26, 2014 at 5:39 PM, Ravi Tumkur <ravi.tumkur at gmail.com> wrote:

> Dean NEK Users,
>
> I am looking for some sort of help or documentation explaining the object
> definitions for evaluating surface integrals.
>
> My eventual application will be to evaluate the drag and lift forces for
> the case of a 2D flow past a cylinder, supported on elastic foundation,
> i.e., vortex-induced vibration simulations using NEK5000.
>
> So far, the examples available in the repository and the NEK mailing list
> have enabled me to simulate the motionless cylinder and the case of
> cylinder moving with a prescribed motion.
>
> However, I have hard time decoding the surface integral evaluation in
> subroutine "set_obj" available in the "ext_cyl.usr". Overall, I understand
> that there is a conditional statement to find all the elements (or element
> edges) with "W" boundary condition and then an object is created for each
> of those elements. It would be very helpful is someone could point me to a
> documentation/help, which gives an explanation for the following functions
> or variables which have been used in the "set_obj" subroutine.
>
> 1. variable "hcode"
> 2. variable "lochis"
> 3. variable "nhis"
> 4. function or variable "cbc"
> 5. variable "nmember"
> 6. function or variable "object"
>
> Any hints to understand this subroutine "set_obj" of the example model
> "ext_cyl" would be of great help for me to understand and develop the model
> for vortex-induced vibration.
>
> In addition, if there is already an example model to perform
> vortex-induced vibration, please let me know.
>
> Thanks in advance. Any hints and tips are much appreciated.
>
> Regards,
> Ravi
>
>
> --
> Ravi Kumar T R
>
> University of Illinois at Urbana-Champaign
> ph : +1 217 778 7538
> http://lndvl.mechse.illinois.edu/
>



-- 
Ravi Kumar T R

University of Illinois at Urbana-Champaign
ph : +1 217 778 7538
http://lndvl.mechse.illinois.edu/
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