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127 lines
3.7 KiB
C++
Executable File
127 lines
3.7 KiB
C++
Executable File
/////////////////////////////////////////////////////////////
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//
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// zero-dimensional kinetics example program
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//
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// $Author$
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// $Revision$
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// $Date$
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//
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// copyright California Institute of Technology 2002
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//
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/////////////////////////////////////////////////////////////
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#include "zerodim.h"
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#include "IdealGasMix.h"
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#include <time.h>
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#include "example_utils.h"
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// Kinetics example. This is written as a function so that one
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// driver program can run multiple examples.
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// The action taken depends on input parameter job:
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// job = 0: print a one-line description of the example.
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// job = 1: print a longer description
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// job = 2: print description, then run the example.
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int kinetics_example1(int job) {
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try {
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cout << "Ignition simulation using class IdealGasMix "
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<< "with file gri30.inp."
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<< endl;
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if (job >= 1) {
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cout << "Constant-pressure ignition of a "
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<< "hydrogen/oxygen/nitrogen"
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" mixture \nbeginning at T = 1001 K and P = 1 atm." << endl;
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}
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if (job < 2) return 0;
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// header
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writeCanteraHeader(cout);
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// create an ideal gas mixture that corresponds to GRI-Mech
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// 3.0
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IdealGasMix* gg = new IdealGasMix("gri30.xml", "gri30");
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IdealGasMix& gas = *gg;
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// set the state
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gas.setState_TPX(1001.0, OneAtm, "H2:2.0, O2:1.0, N2:4.0");
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int kk = gas.nSpecies();
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// create a reactor
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Reactor r;
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// create a reservoir to represent the environment
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Reservoir env;
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// specify the thermodynamic property and kinetics managers
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r.setThermoMgr(gas);
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r.setKineticsMgr(gas);
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env.setThermoMgr(gas);
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// create a flexible, insulating wall between the reactor and the
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// environment
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Wall w;
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w.install(r,env);
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// set the "Vdot coefficient" to a large value, in order to
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// approach the constant-pressure limit; see the documentation
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// for class Reactor
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w.setExpansionRateCoeff(1.e9);
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w.setArea(1.0);
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double tm;
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double dt = 1.e-5; // interval at which output is written
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int nsteps = 100; // number of intervals
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// create a 2D array to hold the output variables,
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// and store the values for the initial state
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Array2D soln(kk+4, 1);
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saveSoln(0, 0.0, gas, soln);
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// main loop
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clock_t t0 = clock();
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for (int i = 1; i <= nsteps; i++) {
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tm = i*dt;
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r.advance(tm);
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saveSoln(tm, gas, soln);
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}
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clock_t t1 = clock();
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// make a Tecplot data file and an Excel spreadsheet
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string plotTitle = "kinetics example 1: constant-pressure ignition";
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plotSoln("kin1.dat", "TEC", plotTitle, gas, soln);
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plotSoln("kin1.csv", "XL", plotTitle, gas, soln);
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// print final temperature and timing data
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doublereal tmm = 1.0*(t1 - t0)/CLOCKS_PER_SEC;
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cout << " Tfinal = " << r.temperature() << endl;
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cout << " time = " << tmm << endl;
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cout << " number of residual function evaluations = "
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<< r.integrator().nEvals() << endl;
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cout << " time per evaluation = " << tmm/r.integrator().nEvals()
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<< endl << endl;
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cout << "Output files:" << endl
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<< " kin1.csv (Excel CSV file)" << endl
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<< " kin1.dat (Tecplot data file)" << endl;
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#define DEBUG_HKM
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#ifdef DEBUG_HKM
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delete gg;
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#endif
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return 0;
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}
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// handle exceptions thrown by Cantera
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catch (CanteraError) {
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showErrors(cout);
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cout << " terminating... " << endl;
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return -1;
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}
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}
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