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Timestepper based on userInput

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A new timestepper that reads timesteps from a file generated using
ecl_summary "DECK" TIME
and applies it to the simulator

Also a parameter timestep.initial_step_length (default 1 day) is added
to controll the frist timestep.
This commit is contained in:
Tor Harald Sandve 2016-09-15 12:21:59 +02:00
parent fe53c5f917
commit 380fe6e2fd
4 changed files with 70 additions and 10 deletions
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8
opm/simulators/timestepping/AdaptiveTimeStepping_impl.hpp
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@ -72,7 +72,7 @@ namespace Opm {
, solver_restart_max_( param.getDefault("solver.restart", int(10) ) )
, solver_verbose_( param.getDefault("solver.verbose", bool(true) ) && terminal_output )
, timestep_verbose_( param.getDefault("timestep.verbose", bool(true) ) && terminal_output )
, suggested_next_timestep_( -1.0 )
, suggested_next_timestep_( unit::convert::from(param.getDefault("timestep.initial_step_length", double(1.0) ), unit::day) )
, full_timestep_initially_( param.getDefault("full_timestep_initially", bool(false) ) )
{
// valid are "pid" and "pid+iteration"
@ -95,6 +95,10 @@ namespace Opm {
const double decayrate = param.getDefault("timestep.control.decayrate", double(0.75) );
const double growthrate = param.getDefault("timestep.control.growthrate", double(1.25) );
timeStepControl_ = TimeStepControlType( new SimpleIterationCountTimeStepControl( iterations, decayrate, growthrate ) );
} else if ( control == "hardcoded") {
const std::string filename = param.getDefault("timestep.control.filename", std::string("timesteps"));
timeStepControl_ = TimeStepControlType( new HardcodedTimeStepControl( filename ) );
}
else
OPM_THROW(std::runtime_error,"Unsupported time step control selected "<< control );
@ -202,7 +206,7 @@ namespace Opm {
// compute new time step estimate
double dtEstimate =
timeStepControl_->computeTimeStepSize( dt, linearIterations, relativeChange );
timeStepControl_->computeTimeStepSize( dt, linearIterations, relativeChange, substepTimer.simulationTimeElapsed());
// limit the growth of the timestep size by the growth factor
dtEstimate = std::min( dtEstimate, double(max_growth_ * dt) );

43
opm/simulators/timestepping/TimeStepControl.cpp
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@ -23,6 +23,9 @@
#include <cmath>
#include <iostream>
#include <stdexcept>
#include <string>
#include <fstream>
#include <iostream>
#include <opm/common/ErrorMacros.hpp>
#include <opm/core/utility/Units.hpp>
@ -55,7 +58,7 @@ namespace Opm
}
double SimpleIterationCountTimeStepControl::
computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& /* relativeChange */ ) const
computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& /* relativeChange */, const double /*simulationTimeElapsed */) const
{
double dtEstimate = dt ;
@ -74,6 +77,38 @@ namespace Opm
return dtEstimate;
}
////////////////////////////////////////////////////////
//
// HardcodedTimeStepControl Implementation
//
////////////////////////////////////////////////////////
HardcodedTimeStepControl::
HardcodedTimeStepControl( const std::string filename)
{
std::ifstream infile (filename);
double time;
std::string line;
std::getline(infile, line); //assumes two lines before the timing starts.
std::getline(infile, line);
while (!infile.eof() ) {
infile >> time; // read the time in days
std::string line;
std::getline(infile, line); // skip the rest of the line
timesteps_.push_back( time * unit::day );
}
}
double HardcodedTimeStepControl::
computeTimeStepSize( const double /*dt */, const int /*iterations */, const RelativeChangeInterface& /* relativeChange */ , const double simulationTimeElapsed) const
{
auto nextTime = std::upper_bound(timesteps_.begin(), timesteps_.end(), simulationTimeElapsed);
double dtEstimate = (*nextTime - simulationTimeElapsed);
return dtEstimate;
}
////////////////////////////////////////////////////////
@ -90,7 +125,7 @@ namespace Opm
{}
double PIDTimeStepControl::
computeTimeStepSize( const double dt, const int /* iterations */, const RelativeChangeInterface& relChange ) const
computeTimeStepSize( const double dt, const int /* iterations */, const RelativeChangeInterface& relChange, const double /*simulationTimeElapsed */) const
{
// shift errors
for( int i=0; i<2; ++i ) {
@ -141,9 +176,9 @@ namespace Opm
{}
double PIDAndIterationCountTimeStepControl::
computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& relChange ) const
computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& relChange, const double simulationTimeElapsed ) const
{
double dtEstimate = BaseType :: computeTimeStepSize( dt, iterations, relChange );
double dtEstimate = BaseType :: computeTimeStepSize( dt, iterations, relChange, simulationTimeElapsed);
// further reduce step size if to many iterations were used
if( iterations > target_iterations_ )

27
opm/simulators/timestepping/TimeStepControl.hpp
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@ -48,7 +48,7 @@ namespace Opm
const bool verbose = false);
/// \brief \copydoc TimeStepControlInterface::computeTimeStepSize
double computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& /* relativeChange */ ) const;
double computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& /* relativeChange */, const double /*simulationTimeElapsed */ ) const;
protected:
const int target_iterations_;
@ -82,7 +82,7 @@ namespace Opm
const bool verbose = false );
/// \brief \copydoc TimeStepControlInterface::computeTimeStepSize
double computeTimeStepSize( const double dt, const int /* iterations */, const RelativeChangeInterface& relativeChange ) const;
double computeTimeStepSize( const double dt, const int /* iterations */, const RelativeChangeInterface& relativeChange, const double /*simulationTimeElapsed */ ) const;
protected:
const double tol_;
@ -111,12 +111,33 @@ namespace Opm
const bool verbose = false);
/// \brief \copydoc TimeStepControlInterface::computeTimeStepSize
double computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& relativeChange ) const;
double computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& relativeChange, const double /*simulationTimeElapsed */ ) const;
protected:
const int target_iterations_;
};
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
///
/// HardcodedTimeStepControl
/// Input generated from summary file using the ert application:
/// ecl_summary DECK TIME > filename
//
///////////////////////////////////////////////////////////////////////////////////////////////////////////////
class HardcodedTimeStepControl : public TimeStepControlInterface
{
public:
/// \brief constructor
/// \param filename filename contaning the timesteps
HardcodedTimeStepControl( const std::string filename);
/// \brief \copydoc TimeStepControlInterface::computeTimeStepSize
double computeTimeStepSize( const double dt, const int /* iterations */, const RelativeChangeInterface& /*relativeChange */, const double simulationTimeElapsed) const;
protected:
std::vector<double> timesteps_;
};
} // end namespace Opm
#endif

2
opm/simulators/timestepping/TimeStepControlInterface.hpp
View File

@ -56,7 +56,7 @@ namespace Opm
/// \param timeError object to compute || u^n+1 - u^n || / || u^n+1 ||
///
/// \return suggested time step size for the next step
virtual double computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& relativeChange ) const = 0;
virtual double computeTimeStepSize( const double dt, const int iterations, const RelativeChangeInterface& relativeChange , const double simulationTimeElapsed) const = 0;
/// virtual destructor (empty)
virtual ~TimeStepControlInterface () {}