[Nek5000-users] A postprocessing problem and a query about using LES

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

Haoran,

below are the answers to your questions:

        First of all, could you please introduce an appropriate sample for me to learn how to run Nek5000 within the LES formulation?

If by LES formulation you mean the built-in filter, you can look at the turbChannel example in the Github repo. It implements an explicit LES formulation that you can turn on by setting p30 to 1 in the .rea file I believe. Have a look at the README file.

        And for the 2nd problem, when I dump the final result in .nek5000 format into the PARAVIEW postprocessing software, I could only see some principle fuild variaties fields to be selected in the GUI such as Vx Vy pressure and so on, and could you please give a proper example to show me how to add another paramters like fluctuating velocity in turbulent flow calculating by LES through the list in order to give more details, to illustrate my flow problem better.

You can call outpost2 in the usrcheck subroutine to dump fields in output file. I think the turbChannel example illustrates this capability. Note that you can also visualize the solution with Visit.

Marco

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