Gradient calculation

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Variables
Gradient calculation
Space discretisation
Collaboration diagram for Gradient calculation:

## Variables
integer, save | imrgra
| type of gradient reconstruction More...
double precision, save | anomax
| anomax : angle de non orthogonalite des faces en radian au dela duquel on retient dans le support etendu des cellules voisines de la face les cellules dont un noeud est sur la face More...
integer, dimension(nvarmx), save | nswrgr
| max number of iterations for the iterative gradient More...
double precision, dimension(nvarmx), save | epsrgr
| relative precision of the iterative gradient calculation More...
integer, dimension(nvarmx), save | imligr
| type of gradient clipping More...
double precision, dimension(nvarmx), save | climgr
| climgr : facteur de limitation (>=1, =1 : forte limitation) More...
double precision, dimension(nvarmx), save | extrag
| gradient extrapolation at the boundary More...

## Detailed Description

## Variable Documentation

double precision, save anomax

anomax : angle de non orthogonalite des faces en radian au dela duquel on retient dans le support etendu des cellules voisines de la face les cellules dont un noeud est sur la face

double precision, dimension(nvarmx), save climgr

climgr : facteur de limitation (>=1, =1 : forte limitation)

double precision, dimension(nvarmx), save epsrgr

relative precision of the iterative gradient calculation

double precision, dimension(nvarmx), save extrag

gradient extrapolation at the boundary

- 0: false
- 1: true

integer, dimension(nvarmx), save imligr

type of gradient clipping

- < 0: no clipping
- 0: first order
- 1: second order

integer, save imrgra

type of gradient reconstruction

- 0: iterative process
- 1: standard least suqare methode
- 2: least suqare methode with extended neighbourhood
- 3: least suqare methode with reduced extended neighbourhood
- 4: iterative precess initialized by the least square methode

integer, dimension(nvarmx), save nswrgr

max number of iterations for the iterative gradient