dune-pdelab  2.0.0
onestep/jacobianengine.hh
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1 #ifndef DUNE_ONE_STEP_JACOBIANENGINE_HH
2 #define DUNE_ONE_STEP_JACOBIANENGINE_HH
3 
5 #include <cmath>
6 
7 namespace Dune{
8  namespace PDELab{
9 
17  template<typename OSLA>
19  : public OneStepLocalAssemblerEngineBase<OSLA,
20  typename OSLA::LocalAssemblerDT0::LocalJacobianAssemblerEngine,
21  typename OSLA::LocalAssemblerDT1::LocalJacobianAssemblerEngine
22  >
23  {
24 
26  typename OSLA::LocalAssemblerDT0::LocalJacobianAssemblerEngine,
27  typename OSLA::LocalAssemblerDT1::LocalJacobianAssemblerEngine
28  > BaseT;
29 
30  using BaseT::la;
31  using BaseT::lae0;
32  using BaseT::lae1;
33  using BaseT::implicit;
36  public:
38  typedef OSLA LocalAssembler;
39 
40  typedef typename OSLA::LocalAssemblerDT0 LocalAssemblerDT0;
41  typedef typename OSLA::LocalAssemblerDT1 LocalAssemblerDT1;
42 
43  typedef typename LocalAssemblerDT0::LocalJacobianAssemblerEngine JacobianEngineDT0;
44  typedef typename LocalAssemblerDT1::LocalJacobianAssemblerEngine JacobianEngineDT1;
45 
47  typedef typename OSLA::Traits::Jacobian Jacobian;
48 
50  typedef typename OSLA::Traits::Solution Solution;
51 
53  typedef typename OSLA::Real Real;
54 
62  : BaseT(local_assembler_),
63  invalid_jacobian(static_cast<Jacobian*>(0)),
64  invalid_solution(static_cast<Solution*>(0)),
65  jacobian(invalid_jacobian), solution(invalid_solution)
66  {}
67 
68 
71  void setSolution(const Solution & solution_){
72  solution = &solution_;
73  }
74 
77  void setJacobian(Jacobian & jacobian_){
78  jacobian = &jacobian_;
79 
80  assert(solution != invalid_solution);
81 
82  // Initialize the engines of the two wrapped local assemblers
83  setLocalAssemblerEngineDT0(la.la0.localJacobianAssemblerEngine(*jacobian,*solution));
84  setLocalAssemblerEngineDT1(la.la1.localJacobianAssemblerEngine(*jacobian,*solution));
85  }
86 
90  void setWeights(){
91  la.la0.setWeight(b_rr * la.dt_factor0);
92  la.la1.setWeight(la.dt_factor1);
93  }
94 
97  void preAssembly()
98  {
99  lae0->preAssembly();
100  lae1->preAssembly();
101 
102  // Extract the coefficients of the time step scheme
103  b_rr = la.osp_method->b(la.stage,la.stage);
104  d_r = la.osp_method->d(la.stage);
105 
106  // Here we only want to know whether this stage is implicit
107  implicit = std::abs(b_rr) > 1e-6;
108 
109  // prepare local operators for stage
110  la.la0.setTime(la.time + d_r * la.dt);
111  la.la1.setTime(la.time + d_r * la.dt);
112 
113  setWeights();
114  }
115 
116  template<typename GFSU, typename GFSV>
117  void postAssembly(const GFSU& gfsu, const GFSV& gfsv){
118  lae0->postAssembly(gfsu,gfsv);
119  lae1->postAssembly(gfsu,gfsv);
120  }
122 
123  private:
124 
126  Jacobian * const invalid_jacobian;
127 
129  Solution * const invalid_solution;
130 
133  Jacobian * jacobian;
134 
136  const Solution * solution;
137 
139  Real b_rr, d_r;
140 
141  }; // End of class OneStepLocalJacobianAssemblerEngine
142 
143  }
144 }
145 
146 #endif
void setLocalAssemblerEngineDT1(LocalAssemblerEngineDT1 &lae1_)
Definition: enginebase.hh:121
LocalAssemblerEngineDT0 * lae0
Definition: enginebase.hh:439
The local assembler engine for one step methods which assembles the residual vector.
Definition: onestep/jacobianengine.hh:18
const LocalAssembler & la
Definition: enginebase.hh:437
LocalAssemblerDT0::LocalJacobianAssemblerEngine JacobianEngineDT0
Definition: onestep/jacobianengine.hh:43
void setJacobian(Jacobian &jacobian_)
Definition: onestep/jacobianengine.hh:77
OSLA::Traits::Solution Solution
The type of the solution vector.
Definition: onestep/jacobianengine.hh:50
The local assembler engine for UDG sub triangulations which assembles the residual vector...
Definition: enginebase.hh:15
OSLA LocalAssembler
The type of the wrapping local assembler.
Definition: onestep/jacobianengine.hh:38
OneStepLocalJacobianAssemblerEngine(const LocalAssembler &local_assembler_)
Constructor.
Definition: onestep/jacobianengine.hh:61
LocalAssemblerEngineDT1 * lae1
Definition: enginebase.hh:440
void preAssembly()
Definition: onestep/jacobianengine.hh:97
OSLA::LocalAssemblerDT0 LocalAssemblerDT0
Definition: onestep/jacobianengine.hh:40
void setSolution(const Solution &solution_)
Definition: onestep/jacobianengine.hh:71
void setWeights()
Definition: onestep/jacobianengine.hh:90
OSLA::Real Real
The type for real numbers.
Definition: onestep/jacobianengine.hh:53
void postAssembly(const GFSU &gfsu, const GFSV &gfsv)
Definition: onestep/jacobianengine.hh:117
bool implicit
Definition: enginebase.hh:442
const E & e
Definition: interpolate.hh:172
OSLA::LocalAssemblerDT1 LocalAssemblerDT1
Definition: onestep/jacobianengine.hh:41
void setLocalAssemblerEngineDT0(LocalAssemblerEngineDT0 &lae0_)
Definition: enginebase.hh:116
OSLA::Traits::Jacobian Jacobian
The type of the residual vector.
Definition: onestep/jacobianengine.hh:47
LocalAssemblerDT1::LocalJacobianAssemblerEngine JacobianEngineDT1
Definition: onestep/jacobianengine.hh:44