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/*============================================================================
* Code_Saturne documentation page
*============================================================================*/
/*
This file is part of Code_Saturne, a general-purpose CFD tool.
Copyright (C) 1998-2021 EDF S.A.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/*-----------------------------------------------------------------------------*/
/*!
\page les_inflow Generation of synthetic turbulence at LES inlets
\section cs_user_les_infow_intro Introduction
Generation of synthetic turbulence at LES inlets can be defined using
the \ref cs_user_les_inflow_define user function, and possibly
updated using \ref cs_user_les_inflow_update, with
\ref cs_user_les_inflow_advanced allowing for finer definition of
target statistics the inlet if needed.
\section cs_user_les_inflow_init Global caracteristics of synthetic turbulence inlets
\subsection user_les_inflow_general General settings
The \ref cs_user_les_inflow_define function is the main entry point
for LES inflow definitions.
It can be used to set general options, such as the specific
checkpoint/restart behavior, as in the following example:
\snippet cs_user_les_inflow-base.c set_restart
\subsection user_les_inflow_define_inlets Defining inlet properties
For each LES inlet, the \ref cs_les_inflow_add_inlet
must be used.
For example, to use the Batten Method for boundary faces of
a zone named INLET_1:
\snippet cs_user_les_inflow-base.c init_1
And to use the Synthetic Eddy Method for boundary faces of
a zone named INLET_2:
\section cs_user_les_inflow_modify Modifying synthetic turbulence inlets
\subsection user_les_inflow_update Updating base characteristics
To update reference velocity, turbulent kinetic energy, or dissipation
rate for a given turbulence inlet,
the \ref cs_user_les_inflow_update function may be used.
It is called automatically for each LES inlet defined previously.
The following example illustrates modifying values for the example
zone named INLET_1:
\snippet cs_user_les_inflow-base.c update_1
\subsection cs_user_les_inflow_example_1 Advanced LES inlet Example 1
Mean velocity, Reynolds stresses an dissipation are deduced from a wall law
for the zone named INLET_1 (no modification of
the statistics of the flow is provided for the other synthetic
turbulence inlets).
\snippet cs_user_les_inflow-base.c example_1
\subsection cs_user_les_inflow_example_2 Advanced LES Example 2
Reynolds stresses and dissipation at the inlet are computed
using the turbulence intensity and standard laws for
a circular pipe for for the zone named INLET_1 (no modification of
the statistics of the flow is provided for the other synthetic
turbulence inlets).
\snippet cs_user_les_inflow-base.c example_2
*/
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