Detailed Description

Class of a temperature dependent viscosity model, which provides a good fit over temperature variations of 150 K.

\[ \mu = \mu_0\, \exp(-\frac{T-T_c}{T_v}) \]

where

\begin{eqnarray*} &\mu_0:& \mbox{reference viscosity at the temperature of} T_c\\ &T:& \mbox{temperature,}\\ &T_c:& \mbox{reference temperature,}\\ &T_v:& \mbox{constant}\\ \end{eqnarray*}

Definition at line 41 of file TemperatureDependentViscosity.h.

#include <TemperatureDependentViscosity.h>

Inheritance diagram for MaterialLib::Fluid::TemperatureDependentViscosity:

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Collaboration diagram for MaterialLib::Fluid::TemperatureDependentViscosity:

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Public Member Functions
	TemperatureDependentViscosity (const double mu0, const double T_c, const double T_v)

std::string	getName () const override
	Get model name.

double	getValue (const ArrayType &var_vals) const override

double	getdValue (const ArrayType &var_vals, const PropertyVariableType var) const override

Public Member Functions inherited from MaterialLib::Fluid::FluidProperty
virtual	~FluidProperty ()=default

Private Attributes
const double	_mu0
	Initial viscosity.

const double	_temperature_c
	Reference temperature 1.

const double	_temperature_v
	Reference temperature 2.

Additional Inherited Members
Public Types inherited from MaterialLib::Fluid::FluidProperty
using	ArrayType = std::array<double, PropertyVariableNumber>

Constructor & Destructor Documentation

◆ TemperatureDependentViscosity()

MaterialLib::Fluid::TemperatureDependentViscosity::TemperatureDependentViscosity	(	const double	mu0,
		const double	T_c,
		const double	T_v )

inlineexplicit

Parameters

mu0	\( \mu_0 \)
T_c	\( T_c \)
T_v	\( T_v \)

Definition at line 49 of file TemperatureDependentViscosity.h.

        : _mu0(mu0), _temperature_c(T_c), _temperature_v(T_v)
    {
    }

Member Function Documentation

◆ getdValue()

double MaterialLib::Fluid::TemperatureDependentViscosity::getdValue	(	const ArrayType &	var_vals,
		const PropertyVariableType	var ) const

inlineoverridevirtual

Get the partial differential of the viscosity with respect to temperature.

Parameters

var_vals	Variable values in an array. The order of its elements is given in enum class PropertyVariableType.
var	Variable type.

Implements MaterialLib::Fluid::FluidProperty.

Definition at line 79 of file TemperatureDependentViscosity.h.

    {
        (void)var;
        const double T = var_vals[static_cast<int>(PropertyVariableType::T)];
        return -_mu0 / _temperature_v *
               std::exp(-(T - _temperature_c) / _temperature_v);
    }

References _mu0, _temperature_c, _temperature_v, and MaterialLib::Fluid::T.

◆ getName()

std::string MaterialLib::Fluid::TemperatureDependentViscosity::getName ( ) const

inlineoverridevirtual

Get model name.

Implements MaterialLib::Fluid::FluidProperty.

Definition at line 57 of file TemperatureDependentViscosity.h.

    {
        return "Temperature dependent viscosity";
    }

◆ getValue()

double MaterialLib::Fluid::TemperatureDependentViscosity::getValue ( const ArrayType & var_vals ) const

inlineoverridevirtual

Get viscosity value.

Parameters

var_vals Variable values in an array. The order of its elements is given in enum class PropertyVariableType.

Implements MaterialLib::Fluid::FluidProperty.

Definition at line 66 of file TemperatureDependentViscosity.h.

    {
        const double T = var_vals[static_cast<int>(PropertyVariableType::T)];
        return _mu0 * std::exp(-(T - _temperature_c) / _temperature_v);
    }