blottner_viscosity_unit.C File Reference

#include <iostream>
#include <cmath>
#include "antioch/blottner_viscosity.h"

Go to the source code of this file.

Functions
template<typename Scalar >
int	test_viscosity (const Scalar mu, const Scalar mu_exact, const Scalar tol)
template<typename Scalar >
int	tester ()
int	main ()

Function Documentation

int main

(

)

Definition at line 97 of file blottner_viscosity_unit.C.

{
  return (tester<double>() ||
          tester<long double>() ||
          tester<float>());
}

template<typename Scalar >

int test_viscosity	(	const Scalar	mu,
		const Scalar	mu_exact,
		const Scalar	tol
	)

Definition at line 40 of file blottner_viscosity_unit.C.

Referenced by tester().

{
  using std::abs;

  int return_flag = 0;

  const double rel_error = abs( (mu - mu_exact)/mu_exact);

  if( rel_error  > tol )
    {
      std::cerr << "Error: Mismatch in viscosity" << std::endl
                << "mu(T)    = " << mu << std::endl
                << "mu_exact = " << mu_exact << std::endl
                << "rel_error = " << rel_error << std::endl
                << "tol = " << tol << std::endl;
      return_flag = 1;
    }

  return return_flag;
}

template<typename Scalar >

int tester

(

)

Definition at line 62 of file blottner_viscosity_unit.C.

References Antioch::BlottnerViscosity< CoeffType >::reset_coeffs(), and test_viscosity().

{
  const Scalar a = 3.14e-3;
  const Scalar b = 2.71e-2;
  const Scalar c = 42.0e-5;

  Antioch::BlottnerViscosity<Scalar> mu(a,b,c);

  std::cout << mu << std::endl;

  const Scalar T = 1521.2;

  // octave gives
  const Scalar mu_exact = 0.144422234167703;

  int return_flag = 0;

  const Scalar tol = 1.0e-14;

  return_flag = test_viscosity( mu(T), mu_exact, tol );
  
  const Scalar a2 = 1e-3;
  const Scalar b2 = 2e-2;
  const Scalar c2 = 3e-5;

  mu.reset_coeffs( a2, b2, c2 );

  // octave gives
  const Scalar mu_exact2 = 0.122172495548880;

  return_flag = test_viscosity( mu(T), mu_exact2, tol );

  return return_flag;
}