sunfluidh:numerical_methods_setup_namelist
Différences
Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentesRévision précédenteProchaine révision | Révision précédente | ||
| sunfluidh:numerical_methods_setup_namelist [2017/09/25 09:29] – yann | sunfluidh:numerical_methods_setup_namelist [2017/09/25 14:28] (Version actuelle) – [Number_Iteration_CoarseToFineFGrid (only if the SOR method is used)] yann | ||
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| - | ===== Namelist " | + | ===== Namelist " |
| <WRAP info> | <WRAP info> | ||
| - | This data setup is devoted to the selection of the numerical methods and schemes used in order to solve the conservation equations for velocity components, temperature, | + | This data setup is devoted to the selection of the numerical methods and schemes used in order to solve the conservation equations for velocity components, temperature, |
| * the numerical method applied for solving the conservation equations (for velocity, temperature, | * the numerical method applied for solving the conservation equations (for velocity, temperature, | ||
| - | * the choice of advective or convective flux discretization (for 2nd order schemes). the viscous, conductive or diffusive fluxes are always discretized with centered 2nd order or 4th order scheme according to the previous choice. | + | * the choice of advective or convective flux discretization (for 2nd order schemes). the viscous, conductive or diffusive fluxes are always discretized with a centered 2nd order or 4th order scheme according to the previous choice. |
| * the numerical method (and associated parameters) for solving the Poisson' | * the numerical method (and associated parameters) for solving the Poisson' | ||
| </ | </ | ||
| <note important> | <note important> | ||
| - | Two versions of the data setup exists. This one is related to an old release of the code that can always be used. | + | |
| + | * The choice of numerical methods is here done by means of a set of option numbers | ||
| + | * The parameters related to iterative solvers can be directly included in this namelist | ||
| </ | </ | ||
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| * Following the problem treated, some numerical methods are better adapted than others, this point is precised for each available option. | * Following the problem treated, some numerical methods are better adapted than others, this point is precised for each available option. | ||
| * The partial diagonalization method (Iterative_Method_Selection=3) used for solving the Poisson equation is only permitted for separable problem. | * The partial diagonalization method (Iterative_Method_Selection=3) used for solving the Poisson equation is only permitted for separable problem. | ||
| - | * When the partial diagonalization method is used, the data related to the SOR and multigrid method are useless. | + | * When the partial diagonalization method is used, the data related to the SOR and multigrid method are useless |
| </ | </ | ||
| ===== Definition of the data set ===== | ===== Definition of the data set ===== | ||
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| * Type : integer value | * Type : integer value | ||
| * Number of iterations performed by the SOR method in order to approach the solution on each grid level. | * Number of iterations performed by the SOR method in order to approach the solution on each grid level. | ||
| + | ==== Number_Iteration_FineToCoarseGrid (only if the SOR method is used) ==== | ||
| + | * Type : integer value | ||
| + | * Number of iterations performed by the SOR solver during the restriction step of each V-cycle of the multigrid procedure. For some problems, the minimization of iterations during the restriction step can improve the time-performance of the code.\\ __BEWARE__ : this data is enabled only if the variable Number_Iteration= 0 or is removed from the Namelist. | ||
| + | ==== Number_Iteration_CoarsestGrid (only if the SOR method is used) ==== | ||
| + | * Type : integer value | ||
| + | * Number of iterations performed by the SOR solver on the coarsest grid of each V-cycle of the multigrid procedure.\\ __BEWARE__ : this data is enabled only if the variable Number_Iteration= 0 or is removed from the Namelist. | ||
| + | ==== Number_Iteration_CoarseToFineGrid (only if the SOR method is used) ==== | ||
| + | * Type : integer value | ||
| + | * Number of iterations performed by the SOR solver during the prolongation step of each V-cycle of the multigrid procedure.\\ __BEWARE__ : this data is enabled only if the variable Number_Iteration= 0 or is removed from the Namelist. | ||
| ==== Relaxation_Coefficient (only if the SOR method is used) ==== | ==== Relaxation_Coefficient (only if the SOR method is used) ==== | ||
| * Type : real value between one and two | * Type : real value between one and two | ||
sunfluidh/numerical_methods_setup_namelist.1506324561.txt.gz · Dernière modification : 2017/09/25 09:29 de yann