Documentation du code de simulation numérique SUNFLUIDH

This data set allows the user to handle the heat boundary conditions applied to walls. Walls are identified according to the orientation of their normal direction from the adjacent fluid-cell. They are named as :

• WEST : if the wall is located at the i-1/2 face-cell (in regard to a fluid-cell)
• EAST : if the wall is located at the i+1/2 face-cell.
• BACK : if the wall is located at the j-1/2 face-cell.
• FRONT : if the wall is located at the j+1/2 face-cell.
• SOUTH : if the wall is located at the k-1/2 face-cell.
• NORTH : if the wall is located at the k+1/2 face-cell.
  

A data set can be attributed to the walls of several solid bodies. Some examples are given here .

 &Heat_Wall_Boundary_Condition_Setup
    Wall_BC_DataSetName     ="Set1",
    West_Heat_BC_Option     = 0    , East_Heat_BC_Option     = 0 , 
    Back_Heat_BC_Option     = 0    , Front_Heat_BC_Option    = 0 , 
    South_Heat_BC_Option    = 0    , North_Heat_BC_Option    = 0,
    West_Heat_Function_Type = 0    , East_Heat_Function_Type = 0 ,  
    Back_Heat_Function_Type = 0    , Front_Heat_Function_Type= 0 , 
    South_Heat_Function_Type= 0    , North_Heat_Function_Type= 0,
    West_Wall_BC_Value      = 293. , East_Wall_BC_Value      = 293.0  ,  
    Back_Wall_BC_Value      = 293. , Front_Wall_BC_Value     = 293.   , 
    South_Wall_BC_Value     = 293. , North_Wall_BC_Value     = 293.  ,
    Material_Thermal_Conductivity= 1.00 , 
    Material_Mass_Heat_Capacity  = 1.00 , 
    Material_Density             = 1.00 ,
    Time_Fct_Name                = "Sinus" , 
    Time_Fct_Threshold           = 0.0 , 
    Time_Fct_Time_Scale          = 1.0 ,
    Time_Fct_Magnitude           = 0.0 /

• Type : character string
• Name of the data set associated to the wall boundary conditions for the heat. This name is used as an identifier in order distinguish the different sets of the wall boundary condition defined in the data file. The naming convention adopted is “Set” adjoined with a number : for example “Set1” for the first set, “Set2” for the second one, and so on …
• By default “Set1” is always linked with the walls of domain ends (when they exist). Of course, it can be also linked with any other solid body.
• The same name must be used in the namelists Velocity_Wall_Boundary_Condition_Setup (for velocity boundary conditions) and Species_Wall_Boundary_Condition_Setup (for species boundary conditions), for building a full wall data set . The user finds here some examples about wall boundary conditions).
• Default value= none

• Type : integer value
• Select the type of the heat boundary condition linked to the WEST wall. The available options are :
  • 0 : Fixed temperature
  • 1 : Fixed heat flux
  • 2 : Heat transfer in the solid body is explicitly calculated. The solid boby is thus stated like a thermically conductive material and the heat transfer through it is explicitly solved.
  • 3 : Time-variable heat flux. Time functions defined further are required in the data set.
  • 4 : Time-variable temperature. Time functions defined further are required in the data set.
• Default value= 1

• Type : integer value
• Definition of the distribution law over the wall face. The available options are :
  • 0 : Uniform distribution over the wall
  • greater than 0 : require an user's defined function in the module module_user_define_wall_bc.f90)

Default value= 0

• Type : real value
• Reference value of the temperature or the heat flux on the wall. This depends on the type of boundary condition chosen (see WEST_Heat_BC_Option)
• Default value= 0.0

• Type : real value
• Thermal conductivity of the solid body
• Default value= Thermal conductivity of the fluid

• Type : real value
• Mass heat capacity of the solid body
• Default Value= Heat capacity of the fluid.

• Type : real value
• Density of the solid body
• Default value = Density of the fluid

• Type : character string linked to the user's time function defined in the module “module_user_define_temporal_function.f90”. The time functions already available are :
  • “Sinus” : sinus function
  • “Linear_Ramp” : Linear ramp function

• Type : real value
• Time from which the time function is enabled

• Type : real value
• Time scale of the function (i.e the period for a sinusoidal function)

• Type : real value
• Magnitude of the time function

• Type : boolean value
• Specify the end of the namelist or a group of this type of namelist used to define different types of heat boundary conditions.