45 virtual int order()
override {
return 2; }
49 ADReal & ad_u_dotdot)
const override;
50 virtual void solve()
override;
58 template <
typename T,
typename T2>
74 template <
typename T,
typename T2>
virtual void computeTimeDerivatives() override
Computes the time derivative and the Jacobian of the time derivative.
LStableDirk2(const InputParameters ¶meters)
const InputParameters & parameters() const
Get the parameters of the object.
static InputParameters validParams()
virtual void solve() override
Solves the time step and sets the number of nonlinear and linear iterations.
DualNumber< Real, DNDerivativeType, true > ADReal
Real & _dt
The current time step size.
void computeADTimeDerivatives(ADReal &ad_u_dot, const dof_id_type &dof, ADReal &ad_u_dotdot) const override
method for computing local automatic differentiation time derivatives
virtual int order() override
NumericVector< Number > * _residual_stage1
Buffer to store non-time residual from first stage solve.
virtual void postResidual(NumericVector< Number > &residual) override
Callback to the NonLinearTimeIntegratorInterface called immediately after the residuals are computed ...
virtual bool overridesSolve() const override
void computeTimeDerivativeHelper(T &u_dot, const T2 &u_old) const
Helper function that actually does the math for computing the time derivative.
DIE A HORRIBLE DEATH HERE typedef LIBMESH_DEFAULT_SCALAR_TYPE Real
Base class for time integrators.
NumericVector< Number > * _residual_stage2
Buffer to store non-time residual from second stage solve.
unsigned int _stage
Indicates the current stage (1 or 2).
Second order diagonally implicit Runge Kutta method (Dirk) with two stages.