FPPowerSystem1BusComputeDiffNumber.c File Reference

#include <stdlib.h>
#include <basic.h>
#include <mathfunctions.h>
#include <arrayfunctions.h>
#include <physicalmodels/fppowersystem1bus.h>
#include <mpivars.h>
#include <hypar.h>

Go to the source code of this file.

Functions
double	FPPowerSystem1BusDissipationFunction (int, int, void *, double)
double	FPPowerSystem1BusComputeDiffNumber (void *s, void *m, double dt, double t)

Function Documentation

double FPPowerSystem1BusDissipationFunction	(	int	,
		int	,
		void *	,
		double
	)

Definition at line 19 of file FPPowerSystem1BusFunctions.c.

{
  FPPowerSystem1Bus *params = (FPPowerSystem1Bus*) p;

  double sigma  = params->sigma;
  double omegaS = params->omegaS;
  double omegaB = params->omegaB;
  double lambda = params->lambda;
  double H      = params->H;
  double D      = params->D;

  double dissp = 0;
  if (dir1 == _YDIR_) {

    double term = (sigma*sigma*omegaS*omegaS) / (4.0*H*H);
    double expterm = exp(-t/lambda);

    if (dir2 == _XDIR_) {
      dissp = term * (lambda*omegaB) * (lambda*(1-expterm) - t*expterm);
      /* dissp = term * lambda*omegaB*lambda; */
    } else if (dir2 == _YDIR_) {
      double gamma = D*omegaS / (2.0*H);
      dissp = term * (lambda*(1-expterm) + (gamma*lambda*(t*expterm-lambda*(1-expterm))) );
      /* dissp = term * params->lambda * (1 - params->lambda*gamma); */
    }

  }

  return(dissp);
}

double FPPowerSystem1BusComputeDiffNumber	(	void *	s,
		void *	m,
		double	dt,
		double	t
	)

Definition at line 11 of file FPPowerSystem1BusComputeDiffNumber.c.

{
  HyPar             *solver = (HyPar*)              s;
  FPPowerSystem1Bus *params = (FPPowerSystem1Bus*)  solver->physics;

  int     ndims  = solver->ndims;
  int     ghosts = solver->ghosts;
  int     *dim   = solver->dim_local;

  double  max_diff = 0;
  int     index[ndims];
  int     done = 0; _ArraySetValue_(index,ndims,0);
  while (!done) {
    double dxinv; _GetCoordinate_(0,index[0],dim,ghosts,solver->dxinv,dxinv);
    double dyinv; _GetCoordinate_(1,index[1],dim,ghosts,solver->dxinv,dyinv);
    double dissp_yx= FPPowerSystem1BusDissipationFunction(_YDIR_,_XDIR_,params,t);
    double dissp_yy= FPPowerSystem1BusDissipationFunction(_YDIR_,_YDIR_,params,t);

    double local_diff_yx = absolute(dissp_yx) * dt * dyinv * dxinv;
    double local_diff_yy = absolute(dissp_yy) * dt * dyinv * dyinv;

    if (local_diff_yx > max_diff) max_diff = local_diff_yx;
    if (local_diff_yy > max_diff) max_diff = local_diff_yy;

    _ArrayIncrementIndex_(ndims,dim,index,done);
  }

  return(max_diff);
}