laasonen.hpp

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#pragma once
 
#include "method.hpp"
#include <string>
#include <vector>
 
/**
 * @brief Laasonen implicit method (Backward Euler in time + Central in space).
 *        Unconditionally stable for the 1D heat equation.
 */
class Laasonen : public Method
{
  public:
    std::string name() const override
    {
        return "Laasonen";
    }
 
    void step(const Grid& g,
              double D,
              double dt,
              const std::vector<double>& Tprev,
              const std::vector<double>& Tcurr,
              std::vector<double>& Tnext) const override;
 
    bool uses_previous_step() const noexcept override
    {
        return false;
    }
};