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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 user_ht_convert Examples of enthalpy-temperature conversion law
\section ht_convert_intro Introduction
By default, when not using a specific physical model (which
will usually contain a more advanced conversion), a simple
\f[ H = C_p T \f] law is used.
This simple law will also be used by default in solid zones even
when using a specific fluid model.
When using variable Cp values, an appropriate temperaure to enthalpy
conversion should be defined by the user if solving the Enthalpy.
The \ref cs_user_physical_properties_h_to_t and
\ref cs_user_physical_properties_t_to_h functions (in
\ref cs_user_physical_properties.c) can be used to define an
enthalpy-temperature conversion law and its inverse.
If can be defined on a "per-zone" basis if needed in case different
zones (both solid and boundary) correspond to different fluids
or solid ones.
\section user_ht_convert_ex Example
The following code blocks show an example of enthalpy-temperature
conversion law.
\subsection user_ht_convert_tab Tabulation
The following block is added either outside
\ref cs_user_physical_properties_h_to_t and
\ref cs_user_physical_properties_t_to_h functions (before all function
definitions in \ref cs_user_physical_properties.c), or in both
of these functions:
\snippet cs_user_physical_properties.c tabulation
\subsection user_ht_convert_h_to_t Enthalpy to temperature
The following block is then used in \ref cs_user_physical_properties_h_to_t
to convert enthalpy to temperature:
\snippet cs_user_physical_properties.c z_h_to_t
Note that \c z->name or \c z->location_id can be used as a filter
if "per-zone" properties are needed (such as with solid zones).
\subsection user_ht_convert_h_to_t Temperature to Enthalpy
The following block must then be added in
\ref cs_user_physical_properties_t_to_h for the matching
temperature to Enthalpy conversion:
\snippet cs_user_physical_properties.c z_t_to_h
Note that temperature to enthalpy conversion is only needed
when solving the Enthalpy and using radiative tranfers or
temperature-based boundary conditions.
*/
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