Chaste Commit::ca8ccdedf819b6e02855bc0e8e6f50bdecbc5208
BidomainProblem.cpp
1/*
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34*/
35
36
37#include "BidomainProblem.hpp"
38#include "BidomainSolver.hpp"
39#include "HeartConfig.hpp"
40#include "Exception.hpp"
41#include "DistributedVector.hpp"
42#include "ReplicatableVector.hpp"
43
44template <unsigned DIM>
46{
47 // Annotate bath notes with correct region code
48 if (mHasBath)
49 {
50 // Initialize all nodes to be bath nodes
51 for (typename AbstractTetrahedralMesh<DIM,DIM>::NodeIterator iter=this->mpMesh->GetNodeIteratorBegin();
52 iter != this->mpMesh->GetNodeIteratorEnd();
53 ++iter)
54 {
55 (*iter).SetRegion(HeartRegionCode::GetValidBathId());
56 }
57
58 bool any_bath_element_found = false;
59
60 // Set nodes that are part of a heart element to be heart nodes
61 //for (unsigned i=0; i<this->mpMesh->GetNumElements(); i++)
62 for (typename AbstractTetrahedralMesh<DIM,DIM>::ElementIterator it = this->mpMesh->GetElementIteratorBegin();
63 it != this->mpMesh->GetElementIteratorEnd();
64 ++it)
65 {
66 Element<DIM, DIM>& r_element = *it;
67
69 {
70 for (unsigned j=0; j<r_element.GetNumNodes(); j++)
71 {
72 r_element.GetNode(j)->SetRegion(HeartRegionCode::GetValidTissueId());
73 }
74 }
75 else
76 {
78 any_bath_element_found = true;
79 }
80 }
81
82 if (!PetscTools::ReplicateBool(any_bath_element_found))
83 {
84 EXCEPTION("No bath element found");
85 }
86 }
87 else
88 {
89 // The problem hasn't been set up with a bath, so check that the user hasn't set any options
90 // which would suggest they're expecting there to be a bath!
91 std::set<unsigned> bath_identifiers = HeartConfig::Instance()->rGetBathIdentifiers();
92 if (!(bath_identifiers.size()==1 && bath_identifiers.find(1)==bath_identifiers.begin())) // IF NOT only 1 in the bath identifiers set
93 {
94 EXCEPTION("User has set bath identifiers, but the BidomainProblem isn't expecting a bath. Did you mean to use BidomainProblem(..., true)? Or alternatively, BidomainWithBathProblem(...)?");
95 }
96 }
97}
98
99template<unsigned DIM>
101{
103 if (mHasBath)
104 {
105 // get the voltage stripe
106 DistributedVector ic = this->mpMesh->GetDistributedVectorFactory()->CreateDistributedVector(init_cond);
108
109 for (DistributedVector::Iterator index = ic.Begin();
110 index!= ic.End();
111 ++index)
112 {
113 if (HeartRegionCode::IsRegionBath( this->mpMesh->GetNode( index.Global )->GetRegion() ))
114 {
115 voltage_stripe[index] = 0.0;
116 }
117 }
118 ic.Restore();
119 }
120
121 return init_cond;
122}
123
124template<unsigned DIM>
126{
127 AnalyseMeshForBath();
128 mpBidomainTissue = new BidomainTissue<DIM>(this->mpCellFactory, HeartConfig::Instance()->GetUseStateVariableInterpolation());
129 return mpBidomainTissue;
130}
131
132template<unsigned DIM>
134{
135 /*
136 * NOTE: The this->mpBoundaryConditionsContainer.get() lines below convert a
137 * boost::shared_ptr to a normal pointer, as this is what the solvers are
138 * expecting. We have to be a bit careful though as boost could decide to delete
139 * them whenever it feels like as it won't count the assembers as using them.
140 *
141 * As long as they are kept as member variables here for as long as they are
142 * required in the solvers it should all work OK.
143 */
144 mpSolver = new BidomainSolver<DIM,DIM>(mHasBath,
145 this->mpMesh,
146 mpBidomainTissue,
147 this->mpBoundaryConditionsContainer.get());
148
149 try
150 {
151 mpSolver->SetFixedExtracellularPotentialNodes(mFixedExtracellularPotentialNodes);
152 mpSolver->SetRowForAverageOfPhiZeroed(mRowForAverageOfPhiZeroed);
153 }
154 catch (const Exception& e)
155 {
156 delete mpSolver;
157 throw e;
158 }
159
160 return mpSolver;
161}
162
163template<unsigned DIM>
165 AbstractCardiacCellFactory<DIM>* pCellFactory, bool hasBath)
166 : AbstractCardiacProblem<DIM,DIM, 2>(pCellFactory),
167 mpBidomainTissue(NULL),
168 mRowForAverageOfPhiZeroed(INT_MAX),
169 mHasBath(hasBath)
170{
172}
173
174template<unsigned DIM>
176 : AbstractCardiacProblem<DIM, DIM, 2>(),
177 mpBidomainTissue(NULL),
178 mRowForAverageOfPhiZeroed(INT_MAX)
179{
181}
182
183template<unsigned DIM>
185{
186 mFixedExtracellularPotentialNodes.resize(nodes.size());
187 for (unsigned i=0; i<nodes.size(); i++)
188 {
189 // the solver checks that the nodes[i] is less than
190 // the number of nodes in the mesh so this is not done here
191 mFixedExtracellularPotentialNodes[i] = nodes[i];
192 }
193}
194
195template<unsigned DIM>
197{
198 mRowForAverageOfPhiZeroed = 2*node+1;
199}
200
201template<unsigned DIM>
203{
204 assert(mpBidomainTissue!=NULL);
205 return mpBidomainTissue;
206}
207
208template<unsigned DIM>
210{
212 {
213 std::cout << "Solved to time " << time << "\n" << std::flush;
214 }
215
216 double v_max, v_min, phi_max, phi_min;
217
218 VecStrideMax( this->mSolution, 0, CHASTE_PETSC_NULLPTR, &v_max );
219 VecStrideMin( this->mSolution, 0, CHASTE_PETSC_NULLPTR, &v_min );
220
221 VecStrideMax( this->mSolution, 1, CHASTE_PETSC_NULLPTR, &phi_max );
222 VecStrideMin( this->mSolution, 1, CHASTE_PETSC_NULLPTR, &phi_min );
223
225 {
226 std::cout << " V; phi_e = " << "[" <<v_min << ", " << v_max << "]" << ";\t"
227 << "[" <<phi_min << ", " << phi_max << "]" << "\n"
228 << std::flush;
229 }
230}
231
232template<unsigned DIM>
234{
236 if (extending)
237 {
238 mExtracelluarColumnId = this->mpWriter->GetVariableByName("Phi_e");
239 }
240 else
241 {
242 mExtracelluarColumnId = this->mpWriter->DefineVariable("Phi_e","mV");
243 }
245}
246
247template<unsigned DIM>
248void BidomainProblem<DIM>::WriteOneStep(double time, Vec voltageVec)
249{
250 this->mpWriter->PutUnlimitedVariable(time);
251 std::vector<int> variable_ids;
252 variable_ids.push_back(this->mVoltageColumnId);
253 variable_ids.push_back(mExtracelluarColumnId);
254 this->mpWriter->PutStripedVector(variable_ids, voltageVec);
256}
257
258template<unsigned DIM>
260{
262 if (mFixedExtracellularPotentialNodes.empty())
263 {
264 // We're not pinning any nodes.
265 if (mRowForAverageOfPhiZeroed==INT_MAX)
266 {
267 // We're not using the constrain Average phi_e to 0 method, hence use a null space
268 // Check that the KSP solver isn't going to do anything stupid:
269 // phi_e is not bounded, so it'd be wrong to use a relative tolerance
270 if (HeartConfig::Instance()->GetUseRelativeTolerance())
271 {
272 EXCEPTION("Bidomain external voltage is not bounded in this simulation - use KSP *absolute* tolerance");
273 }
274 }
275 }
276}
277
278template<unsigned DIM>
280{
281 if (!mHasBath)
282 {
283 //Cannot set electrodes when problem has been defined to not have a bath
284 return;
285 }
286
287 assert(this->mpMesh!=NULL);
288
289 if (HeartConfig::Instance()->IsElectrodesPresent())
290 {
291 mpElectrodes = (boost::shared_ptr<Electrodes<DIM> >) new Electrodes<DIM>(*(this->mpMesh));
292 }
293}
294
295template<unsigned DIM>
297{
298 if (mpElectrodes && mpElectrodes->SwitchOn(time))
299 {
300 // At the moment mpBcc and mpDefaultBcc point to a set default BC
301 assert(this->mpBoundaryConditionsContainer);
302 //assert(this->mpDefaultBoundaryConditionsContainer);
303
304 // Note, no point calling this->SetBoundaryConditionsContainer() as the
305 // solver has already been created..
306 mpSolver->ResetBoundaryConditionsContainer(mpElectrodes->GetBoundaryConditionsContainer().get());
307
308 // ..but we set mpBcc anyway, so the local mpBcc is
309 // the same as the one being used in the solver...
310 this->mpBoundaryConditionsContainer = mpElectrodes->GetBoundaryConditionsContainer();
311
313 this->mpDefaultBoundaryConditionsContainer = this->mpBoundaryConditionsContainer;
314
315 // At t==0 or after checkpointing we won't have a system assembled at this stage: BCs will be applied once the matrix
316 // is assembled. Dirichlet BCs will be present at the time of assembly and no null space will be created either.
317 if (mpSolver->GetLinearSystem() != NULL)
318 {
319 // System matrix is assembled once at the beginning of the simulation. After that, nobody will take care
320 // of applying new BC to the system matrix. Must be triggered explicitly.
321 if (mpElectrodes->HasGroundedElectrode())
322 {
323 this->mpBoundaryConditionsContainer->ApplyDirichletToLinearProblem( *(mpSolver->GetLinearSystem()),
324 true, false);
325 }
326
327 // If a grounded electrode is switched on, the linear system is not singular anymore. Remove the null space.
328 if (mpElectrodes->HasGroundedElectrode())
329 {
330 mpSolver->GetLinearSystem()->RemoveNullSpace();
331 }
332 }
333 }
334}
335
336template<unsigned DIM>
338{
339 if (mpElectrodes && mpElectrodes->SwitchOff(time))
340 {
341 // At the moment mpBcc should exist and therefore
342 // mpDefaultBcc should be empty (not if electrodes switched on after 0ms)
343 assert(this->mpBoundaryConditionsContainer);
344 //assert(! this->mpDefaultBoundaryConditionsContainer);
345
346 // Set up default boundary conditions container - no Neumann fluxes
347 // or Dirichlet fixed nodes
348 this->mpDefaultBoundaryConditionsContainer.reset(new BoundaryConditionsContainer<DIM,DIM,2>);
349 for (unsigned problem_index=0; problem_index<2; problem_index++)
350 {
351 this->mpDefaultBoundaryConditionsContainer->DefineZeroNeumannOnMeshBoundary(this->mpMesh, problem_index);
352 }
353
354 // If there's a grounded electrode, we must remove BC from linear system. At the moment, we don't
355 // have a sensible way of doing this, therefore we reassemble the system.
356 if (mpElectrodes->HasGroundedElectrode())
357 {
358 delete mpSolver;
360 mpSolver->SetTimeStep(HeartConfig::Instance()->GetPdeTimeStep());
361 }
362
363 // Note, no point calling this->SetBoundaryConditionsContainer() as the
364 // solver has already been created..
365 mpSolver->ResetBoundaryConditionsContainer(this->mpDefaultBoundaryConditionsContainer.get());
366 // ..but we set mpBcc to be mpDefaultBcc anyway, so the local mpBcc is
367 // the same as the one being used in the solver...
368 this->mpBoundaryConditionsContainer = this->mpDefaultBoundaryConditionsContainer;
369 }
370}
371
372template<unsigned DIM>
373void BidomainProblem<DIM>::SetUpAdditionalStoppingTimes(std::vector<double>& rAdditionalStoppingTimes)
374{
375 if (mpElectrodes)
376 {
377 rAdditionalStoppingTimes.push_back(mpElectrodes->GetSwitchOnTime());
378 rAdditionalStoppingTimes.push_back(mpElectrodes->GetSwitchOffTime());
379 }
380}
381
382template<unsigned DIM>
384{
385 return mHasBath;
386}
387
388// Explicit instantiation
389template class BidomainProblem<1>;
390template class BidomainProblem<2>;
391template class BidomainProblem<3>;
392
393
394// Serialization for Boost >= 1.36
#define EXCEPTION(message)
#define CHASTE_PETSC_NULLPTR
A macro to define PETSc null pointer based on the PETSc version.
#define EXPORT_TEMPLATE_CLASS_SAME_DIMS(CLASS)
void DefineExtraVariablesWriterColumns(bool extending)
virtual void DefineWriterColumns(bool extending)
Node< SPACE_DIM > * GetNode(unsigned localIndex) const
unsigned GetUnsignedAttribute()
unsigned GetNumNodes() const
void SetNodeForAverageOfPhiZeroed(unsigned node)
void SetUpAdditionalStoppingTimes(std::vector< double > &rAdditionalStoppingTimes)
void AtBeginningOfTimestep(double time)
virtual AbstractDynamicLinearPdeSolver< DIM, DIM, 2 > * CreateSolver()
virtual void DefineWriterColumns(bool extending)
std::vector< unsigned > mFixedExtracellularPotentialNodes
virtual AbstractCardiacTissue< DIM > * CreateCardiacTissue()
void OnEndOfTimestep(double time)
void SetFixedExtracellularPotentialNodes(std::vector< unsigned > nodes)
void WriteInfo(double time)
BidomainTissue< DIM > * GetBidomainTissue()
virtual void WriteOneStep(double time, Vec voltageVec)
const std::set< unsigned > & rGetBathIdentifiers()
static HeartConfig * Instance()
static bool IsRegionTissue(HeartRegionType regionId)
static HeartRegionType GetValidTissueId()
static bool IsRegionBath(HeartRegionType regionId)
static HeartRegionType GetValidBathId()
static bool ReplicateBool(bool flag)
static bool AmMaster()