Différences

Ci-dessous, les différences entre deux révisions de la page.

--- sunfluidh:simulation_management_setup_namelist [2016/11/12 12:34] – yann
+++ sunfluidh:simulation_management_setup_namelist [2016/11/12 14:53] – yann
@@ Ligne 4: / Ligne 4: @@
   * record the results associated to time series of probes, instantaneous quantity fields, statistical quantities.
   * record the backup/restart files
 -----
 ==== Restart_Parameter ====
@@ Ligne 26: / Ligne 27: @@
    * Type : Real value
    * This value is the physical time limit reached by the simulation before stopping.
+==== TimeStep_Type =====
+   * Type : Integer value
+   * Selection of way to define the numerical time step :
+     * 0 : The time step is constant and defined by the user by means of the variable "Timestep_max" (see further).
+     * -1 : The time step evolves lineraly between the values given by "Timestep_min" and "Timestep_max". The range of variation is defined by the variable "Iterations_For_Timestep_Linear_Progress" (in time iteration number, see further).
+     * 1 : The time step is calculated for each time iteration by means of the CFL parameter. The CFL parameter can be constant, it is thus defined by the variable "CFL_Max".\\ It can also evolve linearly between the values given by  "CFL_Min" and "CFL_Max". The range of variation is defined by the variable "Iterations_For_Timestep_Linear_Progress" (in time iteration number, see further).
+==== Timestep_min ====
+   * Type : Real value
+   * Minimum value of the time step. This variable can be omitted when the time step is constant.
+==== Timestep_max ====
+   * Type : Real value
+   * Maximum value of the time step. This variable set the value of the time step when it is constant.
+==== CFL_min ====
+   * Type : Real value. This variable can be omitted when the time step is constant.
+   * Minimum value of the CFL parameter.
+==== CFL_max ====
+   * Type : Real value
+   * Maximum value of the CFL parameter. This variable set the value of the CFL parameter when it is constant.
+==== Iterations_For_Timestep_Linear_Progress ====
+   * Type : Integer value
+   * Number of time iterations over which the CFL parameter or the time step can evolve linearly. When the time step or the CFL parameter are constant, this variable must not set to a value greater than 1. It could actually be omitted (this default value is 1).
+==== Simulation_Backup_Rate ====
+   * Type : Integer value
+   * This variable defines the recording rate, __in time iteration units__ , of the backup files (for instance, when "Simulation_Backup_Rate=1000" a data backup is carried out for all time iteration numbers that are a multiple of 1000).\\ Backup data are dispatched in two files that are named save_var_yyyyy_n.d and save_fld_yyyyy_n.d ('yyyyy' is the subdomain number for simulations based on the MPI domain-decomposition approach, n= 1 or 2 for temporary backup files and n=3 for the backup files created during the last time step of the simulation).
+==== Field_Recording_Rate ====
+   * Type : Real value
+   * This variable defines the recording rate, __in time units__ , of instantaneous fields (for instance, when "Field_Recording_Rate=1.5" an instantaneous field file is created as soon as the time value is a multiple of 1.5).\\ Instantaneous field files are named res_xxxxxxx_yyyyy.d ('yyyyy' is the subdomain number for simulations based on the MPI domain-decomposition approach, 'xxxxxxx' is the file number).
+==== Start_Time_For_Statistics ====
+   * Type : Real value
+   * Time from which the statistical fields are calculated.
+==== Time_Range_Statistic_Calculation ====
+   * Type : Real value
+   * Time range over which statistical fields are calculated. When this time range has been covered, statistical fields are recorded in a file named rst_xxxxxxx_yyyyy.d ('yyyyy' is the subdomain number for simulations based on the MPI domain-decomposition approach, 'xxxxxxx' is the file number). If the simulation is not completed a new cycle of statistical calculation is initialized.