[Nek5000-users] Configure a stress at boundary

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

Hi Peng,

We have looked a bit into this type of boundary condition of Nek5000 stress-formulation -- you need to set boundary condition character in .box file (or choose prenek' option) to 

'shl'

(which probably stands for stress-horizontal-local) and set NEKUSE's the horizontal stress components to tr1 and tr2 in userbc. 

Aleks

________________________________________
From: nek5000-users-bounces at lists.mcs.anl.gov [nek5000-users-bounces at lists.mcs.anl.gov] on behalf of nek5000-users at lists.mcs.anl.gov [nek5000-users at lists.mcs.anl.gov]
Sent: Friday, June 17, 2016 9:33 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] Configure a stress at boundary

Dear Neks,

I am simulating a water flow in the 3dbox example.
In order to simulate the wind blowing over the water, I hope to add a wind stress at the top boundary.
The wind stress (tau) formulation is given as
tau = rho*C_d*U*U
where tau is the wind stress, rho is the air density, C_d is the drag coefficient, and U is the wind speed.
I guess the wind stress should be configured in ‘userbc’, but how to do it? Can anyone help?

Thank you!
Peng



*************************
Peng Wang, Ph.D.

Postdoctoral Associate
Department of Ocean Sciences
Rosenstiel School of Marine and Atmospheric Science
University of Miami
4600 Rickenbacker Causeway
Miami, Florida 33149-1098, USA


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