alma::analytic1D::SPR_calculator_RealSpace Class Reference

Class for computing the approximate analytical RTA single pulse energy density response in real space at a given time. More...

#include <analytic1d.hpp>

Public Member Functions
	SPR_calculator_RealSpace (const alma::Crystal_structure *poscar, const alma::Gamma_grid *grid, const Eigen::ArrayXXd *w, double T)
	Constructor: initialise internal variables.
void	setDirection (const Eigen::Vector3d unitvector)
	Function setting the thermal transport axis.
void	setLinGrid (double xmin, double xmax, int Nx)
	Construct a linear space grid from xmin to xmax with Nx elements.
void	setLogGrid (double xmin, double xmax, int Nx)
	Construct a logarithmic space grid from xmin to xmax with Nx elements.
void	declareGridNormalised (bool norm)
	Declare whether the space grid is normalised. More...
void	normaliseOutput (bool norm)
void	setTime (double t)
	Set time value to be used for calculations.
void	setLogMFPbins (double MFPmin, double MFPmax, int Nbins)
	Set MFP bins to be used for resolveSPRbyMFP()
Eigen::VectorXd	getGrid ()
	Retrieve the spatial grid.
Eigen::VectorXd	getNormalisedGrid ()
double	getTime ()
	Retrieve time value.
Eigen::VectorXd	getMFPbins ()
	Retrieve MFP bins.
double	getDiffusivity ()
	Retrieve Fourier diffusivity along thermal transport axis.
Eigen::VectorXd	getSourceTransient (const Eigen::Ref< Eigen::VectorXd > timegrid)
	Compute source transient P(x=0) at the provided times.
Eigen::VectorXd	getSPR ()
	Compute SPR and retrieve it.
Eigen::MatrixXd	resolveSPRbyMFP ()
	Compute SPR of individual modes resolved by MFP.

Detailed Description

Class for computing the approximate analytical RTA single pulse energy density response in real space at a given time.

The approach is only valid in weakly quasiballistic regime (time scales exceeding phonon relaxation times) so that P(xi,t) exp[-psi(xi)*t].

Calculations are performed by evaluating the Fourier inversion (1/pi)*Integral(exp[-psi(xi)*t]*cos(xi*x),xi=0..infinity) semi-analytically with 2nd order Filon-type quadrature.

Member Function Documentation

declareGridNormalised()

void alma::analytic1D::SPR_calculator_RealSpace::declareGridNormalised

(

bool

norm

)

Declare whether the space grid is normalised.

If yes, space grid values are counted in Fourier diffusion lengths, i.e. x_actual = x_grid*sqrt(2*Dbulk*t)

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

• analytic1d.hpp
• analytic1d.cpp