EvaporationModelRecoilPressure< number > Class Template Reference

Developer Documentation: MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number > Class Template Reference

Developer Documentation

#include <evaporation_model_recoil_pressure.hpp>

Inheritance diagram for MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number >:

Collaboration diagram for MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number >:

Public Member Functions
	EvaporationModelRecoilPressure (const RecoilPressureData< number > &recoil_data, const number boiling_temperature, const number molar_mass, const number latent_heat_evaporation)

number	local_compute_evaporative_mass_flux (const number T) const final

dealii::VectorizedArray< number >	local_compute_evaporative_mass_flux_vec (const dealii::VectorizedArray< number > &T) const final

number	local_compute_evaporative_mass_flux_derivative (const number T) const final

dealii::VectorizedArray< number >	local_compute_evaporative_mass_flux_vec_derivative (const dealii::VectorizedArray< number > &T) const final

Public Member Functions inherited from MeltPoolDG::Evaporation::EvaporationModelBase< number >
virtual	~EvaporationModelBase ()=default

Private Attributes
const RecoilPressurePhenomenologicalModel< number >	recoil_model

const number	sticking_constant

const number	Cm

const number	temperature_constant

Detailed Description

template<typename number>
class MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number >

This class implements the evaporative mass flux computed from the recoil pressure as presented in, e.g.,

S.A. Khairallah, A.T. Anderson, A. Rubenchik, W.E. King, Laser powder-bed fusion additive manufacturing: Physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones, Acta Mater. 108 (2016) 36–45. DOI: 10.1016/j.actamat.2016.02.014.

Constructor & Destructor Documentation

◆ EvaporationModelRecoilPressure()

template<typename number >

MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number >::EvaporationModelRecoilPressure	(	const RecoilPressureData< number > &	recoil_data,
		const number	boiling_temperature,
		const number	molar_mass,
		const number	latent_heat_evaporation
	)

Member Function Documentation

◆ local_compute_evaporative_mass_flux()

template<typename number >

number MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number >::local_compute_evaporative_mass_flux ( const number T ) const

finalvirtual

The evaporative mass flux is computed as

                             ______
                            /  M

. /----— m(T) = 0.82 · c_s · p_v(T) · √ 2πR T

where c_s is the sticking coefficient, p_v(T) the recoil pressure, M the molar mass, R the molar gas constant and T the temperature.

Implements MeltPoolDG::Evaporation::EvaporationModelBase< number >.

◆ local_compute_evaporative_mass_flux_derivative()

template<typename number >

number MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number >::local_compute_evaporative_mass_flux_derivative ( const number T ) const

finalvirtual

Compute the derivative of the evaporative mass flux as

d m . / c_T 1 \ --— = 0.82 · c_s · m(T) | --— - --— | d T \ T² 2 T /

where it is assumed that the recoil pressure p_v(T) is computed as

                   /       /  1       1  \\

p_v(T) = s * c_p * exp|-c_T * | — - — || \ \ T T_v //

according to the phenomenological model by Anisimov and Khokhlov as implemented in RecoilPressurePhenomenologicalModel.

S. Anisimov and V. Khokhlov. Instabilities in Laser-Matter Interaction. CRC Press, Boca Raton, FL, 1995.

Reimplemented from MeltPoolDG::Evaporation::EvaporationModelBase< number >.

◆ local_compute_evaporative_mass_flux_vec()

template<typename number >

dealii::VectorizedArray< number > MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number >::local_compute_evaporative_mass_flux_vec ( const dealii::VectorizedArray< number > & ) const

finalvirtual

Base function to compute the evaporative mass flux m in kg/(m^2 s) for a given temperature value T.

Reimplemented from MeltPoolDG::Evaporation::EvaporationModelBase< number >.

◆ local_compute_evaporative_mass_flux_vec_derivative()

template<typename number >

dealii::VectorizedArray< number > MeltPoolDG::Evaporation::EvaporationModelRecoilPressure< number >::local_compute_evaporative_mass_flux_vec_derivative ( const dealii::VectorizedArray< number > & T ) const

finalvirtual

Reimplemented from MeltPoolDG::Evaporation::EvaporationModelBase< number >.