tasmet/testing/solver/brent_test.cpp
J.A. de Jong @ vulgaris e8421df13e Whole lotta further
2016-12-15 21:34:11 +01:00

76 lines
1.8 KiB
C++

// newton_raphson_test.cpp
//
// last-edit-by: J.A. de Jong
//
// Description:
// Test program to test the Newton-Raphson solver implementation
//////////////////////////////////////////////////////////////////////
#include "system.h"
#include "brent.h"
#include "tasmet_io.h"
#include "tasmet_tracer.h"
#include "helium.h"
#include "nitrogen.h"
#include "air.h"
#include "globalconf.h"
#include "tasmet_variable.h"
#include "adiabatictemp.h"
SolverAction solver_callback(SolverProgress p){
cout << "Iteration: " << p.iteration << ". Function error: " << p.fun_err <<". Relative error: " << p.rel_err << endl;
if(p.fun_err < 1e-7){
TRACE(9, "Returning stop");
return Stop;
}
else {
TRACE(9, "Returning continue");
return Continue;
}
}
class TestFunction: public NoGradientNonlinearSystem<d> {
d cur_sol;
public:
TestFunction(d guess){cur_sol = guess;}
d residual() const {
return pow(cur_sol,2)-3;
}
void updateSolution(const d& res){ cur_sol = res;}
d getSolution() const { return cur_sol;}
TestFunction* copy() const {return new TestFunction(cur_sol);}
sdmat jacobian() const {
sdmat res(1,1);
res(0,0) = 2*cur_sol;
return res;
}
};
int main(){
INITTRACE(5);
// TestFunction t(100);
// Brent solver(t);
// std::function<SolverAction(SolverProgress)> p = solver_callback;
// solver.start(&p);
// d res = solver.getSolution();
// cout << "Final solution: x = " << res << endl;
// Nitrogen nit(293.15,101325);
Air air(293.15,101325);
Helium helium(293.15,101325);
gc_ptr gc(new GlobalConf(10,100));
Variable pressure(gc,10*101325);
Variable temperature = adiabaticTemp(helium,pressure);
}
//////////////////////////////////////////////////////////////////////