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MollifiedLangmuirMaterial.h File Reference

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Classes

class  MollifiedLangmuirMaterial
 Holds Langmuir parameters associated with desorption Calculates mass-flow rates and derivatives thereof for use by kernels. More...
 

Functions

template<>
InputParameters validParams< MollifiedLangmuirMaterial > ()
 

Function Documentation

template<>
InputParameters validParams< MollifiedLangmuirMaterial > ( )

Definition at line 11 of file MollifiedLangmuirMaterial.C.

12 {
13  InputParameters params = validParams<Material>();
14 
15  params.addRequiredCoupledVar(
16  "one_over_desorption_time_const",
17  "Time constant for Langmuir desorption (gas moving from matrix to porespace). Units [s]");
18  params.addRequiredCoupledVar(
19  "one_over_adsorption_time_const",
20  "Time constant for Langmuir adsorption (gas moving from porespace to matrix). Units [s].");
21  params.addRequiredParam<Real>("langmuir_density",
22  "This is (Langmuir volume)*(density of gas at standard temp and "
23  "pressure). Langmuir volume is measured in (gas volume)/(matrix "
24  "volume). (Methane density(101kPa, 20degC) = 0.655kg/m^3. "
25  "Methane density(101kPa, 0degC) = 0.715kg/m^3.) Units [kg/m^3]");
26  params.addRequiredParam<Real>("langmuir_pressure", "Langmuir pressure. Units Pa");
27  params.addRequiredCoupledVar("conc_var", "The concentration of gas variable");
28  params.addRequiredCoupledVar("pressure_var", "The gas porepressure variable");
29  params.addRangeCheckedParam<Real>("mollifier",
30  0.1,
31  "mollifier > 0",
32  "The reciprocal of time constants will be "
33  "one_over_time_const*tanh( |conc_var - "
34  "equilib_conc|/(mollifier*langmuir_density)). So for "
35  "mollifier very small you will get a stepchange between "
36  "desorption and adsorption, but for mollifier bigger you "
37  "will be a gradual change");
38  params.addClassDescription("Material type that holds info regarding MollifiedLangmuir desorption "
39  "from matrix to porespace and viceversa");
40  return params;
41 }