Post-treatments
================


Thermal
---------

The fluxes are calculated by the operator CALC_CHAM_ELEM by specifying the harmonic number using the simple keyword MODE_FOURIER.

The flow calculation options remain the standard options:

FLUX_ELNO to calculate node flows by element

FLUX_ELGA to calculate flows at Gauss points

The order of the components of the flow vector is :math:`({\phi }_{r},{\phi }_{z},{\phi }_{\theta })`.

Fourier recombination on temperatures is carried out using the operator CREA_CHAMP [:external:ref:`U4.72.04 <U4.72.04>`]. It makes it possible to obtain the temperatures in various angular sections introduced by the user.

Fourier recombination on the flows is done in CREA_CHAMP [:external:ref:`U4.72.04 <U4.72.04>`] according to the same principle.


Mechanics
---------

The deformations and stresses are calculated using the operator CALC_CHAMP.

The calculation options remain the standard options:

EPSI_ELNO to calculate the deformations at the nodes by element

SIEF_ELGA to calculate the stresses at Gauss points

SIGM_ELNO to calculate the constraints at the nodes by element

SIEQ_ELGA to calculate stress equivalents at Gauss points

SIEQ_ELNO to calculate element-wise node stress equivalents

(for these last 2 options, you must have calculated SIEF_ELGA beforehand)

The order of the components of the strain tensor (resp. stresses) is:

:math:`({\varepsilon }_{\mathrm{rr}},{\varepsilon }_{\mathrm{zz}},{\varepsilon }_{\theta \theta },{\varepsilon }_{\mathrm{rz}},{\varepsilon }_{r\theta },{\varepsilon }_{z\theta })` :math:`(\text{resp.}{\sigma }_{\mathrm{rr}},{\sigma }_{\mathrm{zz}},{\sigma }_{\theta \theta },{\sigma }_{\mathrm{rz}},{\sigma }_{r\theta },{\sigma }_{z\theta })`

Fourier recombination is performed by the operator COMB_FOURIER [:external:ref:`U4.83.31 <U4.83.31>`] which makes it possible to recombine all the harmonics of the field (s) appearing in the data structure RESULTAT. This recombination can be done on a list of angles.

The calculation of the equivalent stresses (von Mises, Tresca) is done by the operator CALC_CHAMP with the usual options SIEQ_ELGA and SIEQ_ELNO. It must be done **after** Fourier recombination on constraints SIGM_ELGA.