The pH of the solution is defined as. More...

#include <PHAux.h>

Inheritance diagram for PHAux:

Public Member Functions
	PHAux (const InputParameters &parameters)

Protected Attributes
const VariableValue &	_hplus
	Free molar concentration of H+ ions. More...

const VariableValue &	_gamma
	Activity coefficient of H+ ions. More...

Detailed Description

The pH of the solution is defined as.

pH = - log10(a_H),

where a_H is the activity of the H+ ions, defined as

a_H = gamma C_H,

where gamma is the activity coefficient, and C_H is the molar concentration of free H+ ions in solution

Definition at line 31 of file PHAux.h.

Constructor & Destructor Documentation

PHAux::PHAux ( const InputParameters & parameters )

Definition at line 25 of file PHAux.C.

   : AuxKernel(parameters), _hplus(coupledValue("h_conc")), _gamma(coupledValue("activity_coeff"))
 {
 }

Real PHAux::computeValue ( )

overrideprotectedvirtual

Definition at line 31 of file PHAux.C.

 {
   mooseAssert(_gamma[_qp] * _hplus[_qp] > 0.0, "Negative activity in pH is not possible");
   return -std::log10(_gamma[_qp] * _hplus[_qp]);
 }

const VariableValue& PHAux::_gamma

protected

Activity coefficient of H+ ions.

Definition at line 42 of file PHAux.h.

Referenced by computeValue().

const VariableValue& PHAux::_hplus

protected

Free molar concentration of H+ ions.

Definition at line 40 of file PHAux.h.

Referenced by computeValue().

The documentation for this class was generated from the following files: