Différences

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

--- sunfluidh:species_properties_namelist [2016/09/22 20:38] – créée yann
+++ sunfluidh:species_properties_namelist [2016/11/18 14:48] – [Full data set of the namelist] yann
@@ Ligne 1: / Ligne 1: @@
 ===== Namelist "Species_Properties" =====
-==== List of variable and definition ====
-This data setup is only used in the full version of sunfluidh for the simulation of multi-species flows under low-Mach number hypothesis.
-It is used to define every thermo-chemical properties used to estimated the appropriate species diffusion coefficient in the gas mixture.
-Most of data are initialized with a default value that could be used by the code if this data is not set to the user's value.\\
-Data are used or not depending on the context. For this reason, useless data could be omitted in the data setup.\\
-The user must therefore ensure that useful data are explicitly stated unless he is sure that the default value is correct (if there is any doubt, you can check the file named "check_namelist_data.dat").\\
-Some examples are given here for helping the user about this namelist.
+This data setup is only used in the full version of sunfluidh for the simulation of multi-species gas flows under low-Mach number hypothesis.
+It is used to define every thermo-chemical properties of species to estimate physical properties of gas mixture such as heat capacity, thermal conductivity, transport coefficients of diffusion, ....\\
+Data could be used or not, this depends on the context. \\
+===== Full data set of the namelist =====
+An example on a Helium/Air mixture is given here for helping the user about this data set.
+   &Species_Properties
+            Species_Name          = "He" ,
+            Species_molecular_Mass= 4.0D-03 , Reference_Molecular_Heat_Capacity = 5.193D+03 , Schmidt_Number         = 1.0 ,
+            Electric_Charge       = 0 ,       Lennard_Jones_Diameter            = 2.576D-10 , Lennard_Jones_Potential=  10.20 ,
+            Thermochemical_Properties_Coefficients(1:7,1) = 2.50000000E+00  0.00000000E-00  0.00000000E-00  0.00000000E-00  0.00000000E-00  2.85315086E+05 1.62166556E+00 ,
+            Thermochemical_Properties_Coefficients(1:7,2) = 2.50000000E+00  0.00000000E-00  0.00000000E-00  0.00000000E-00  0.00000000E-00  2.85315086E+05 1.62166556E+00 /
+   &Species_Properties
+            Species_Name          = "Air" ,
+            Species_molecular_Mass= 2.9D-02 , Reference_Molecular_Heat_Capacity = 1.048D+03 , Schmidt_Number         = 1.0 ,
+            Electric_Charge       = 0 ,       Lennard_Jones_Diameter            = 3.711D-10 , Lennard_Jones_Potential=  97.60 ,
+            Thermochemical_Properties_Coefficients(1:7,1) = 0.03298677E+02 0.14082404E-02 -0.03963222E-04 0.05641515E-07 -0.02444854E-10 -0.10208999E+04 0.03950372E+02 ,
+            Thermochemical_Properties_Coefficients(1:7,2) = 0.02926640E+02 0.14879768E-02 -0.05684760E-05 0.10097038E-09 -0.06753351E-13 -0.09227977E+04 0.05980528E+02 ,
+            End_of_Data_Block= .true./
+<note important>The Thermochemical_Properties_Coefficients are provided by the Chemkin data base.\\
+Don't forget to set the variable End_Of_Data_Block to .true. in the last namelist.</note>
+-----
+===== Definition of the data set =====
 -----
-=== Species_Name (type = character string (6)) ===
-=== Species_molecular_Mass (type = real) ===
+==== Species_Name  ====
+   * type : character string with a maximum size of 6
+   * Name of the species present in the gas mixture
+   * Default name given by the user.
-=== Reference_Molecular_Heat_Capacity (type = real) ===
+==== Species_molecular_Mass  ====
+   * type : real value
+   * Molecular mass (mol/kg)
+   * Default value given by the user
-=== Schmidt_Number (type = real) ===
+==== Reference_Molecular_Heat_Capacity ====
+   * type : real value
+   * Species heat capacity (J/K/kg)
+   * Default value given by the user
+==== Schmidt_Number ====
+   * type : real value
+   * The Schmidt number $Sch$ is used to define the diffusion coefficient of the species from the kinematic viscosity as $D_i=\nu/Sch$. \\ This definition is enabled only when the data "Multi_Species_Mixture_Law_for_Mass_Diffusion_Enabled = .false." (coming from the namelist "Fluid_Properties").
+   * Default value given by the user
-=== Electric_Charge  (type = real) ===
+==== Electric_Charge ====
+   * type : real value
+   * Electric charge of the ionized species in electronic unit
+   * Used only if chemical reactions are implied.
+   * Default value given by the user
+==== Lennard_Jones_Diameter ====
+   * type : real value
+   * Diameter of Lennard-Jones (m)
+   * Default value given by the user
-=== Lennard_Jones_Diameter (type = real) ===
+==== Lennard_Jones_Potential  ====
+   * type : real value
+   * Potential of Lennard-Jones (dimensionless)
+   * Default value given by the user
-=== Lennard_Jones_Potential (type = real) ===
+==== Thermochemical_Properties_Coefficients ====
-=== Lennard_Jones_Potential (type = real) ===
+   * type : real array - size array (7,2)
-=== Thermochemical_Properties_Coefficients (type = real) ===
+   * These coefficients are used to define some physical quantities such as enthalpy, entropy, heat capacity, free enthalpy of species in respect with the temperature.
+   * This data setup is an array of size (7,2) , The first dimension corresponds to the number of coefficients considered (here 7) and the second to the number of temperature ranges considered (here 2).
+     * The 1st range of T is  300K ---> 1000K
+     * The 2nd range of T is 1000K ---> 5000K
+   * The coefficients come from the Chemkin data base.
-=== End_of_Data_Block (type= boolean) ===
+==== End_of_Data_Block ====
+   * type : boolean value
+   * Specify the end of the data set constituted by one or several namelist "Species_Properties".