18   params.addClassDescription(
"Time derivative Kernel that acts on a coupled variable. Weak form: "    19                              "$(\\psi_i, \\frac{\\partial v_h}{\\partial t})$.");
    20   params.addRequiredCoupledVar(
"v", 
"Coupled variable");
 static InputParameters validParams()
DualNumber< Real, DNDerivativeType, true > ADReal
const ADVariableValue & _v_dot
virtual ADReal precomputeQpResidual() override
Called before forming the residual for an element. 
registerMooseObject("MooseApp", ADCoupledTimeDerivative)
ADCoupledTimeDerivative(const InputParameters ¶meters)
static InputParameters validParams()
This calculates the time derivative for a coupled variable. 
unsigned int _qp
The current quadrature point index.