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https://github.com/wassname/simpeg.git
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Lindsey Heagy
80 lines
1.7 KiB
Python
80 lines
1.7 KiB
Python
from SimPEG import Problem
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from SimPEG.EM.Base import BaseEMProblem
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from SurveyDC import Survey
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from FieldsDC import Fields, Fields_CC
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class BaseDCProblem(BaseEMProblem):
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surveyPair = Survey
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fieldsPair = Fields
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def fields(self, m):
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self.curModel = m
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f = self.fieldsPair(self.mesh, self.survey)
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A = self.getA()
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self.Ainv = self.Solver(A, **self.solverOpts)
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RHS = self.getRHS()
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u = self.Ainv * RHS
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Srcs = self.survey.srcList
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f[Srcs, self._solutionType] = u
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return f
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def Jvec(self, m, v, f=None):
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raise NotImplementedError
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def Jtvec(self, m, v, f=None):
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raise NotImplementedError
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def getSourceTerm(self):
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"""
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takes concept of source and turns it into a matrix
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"""
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raise NotImplementedError
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class Problem3D_CC(BaseDCProblem):
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_solutionType = 'phiSolution'
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_formulation = 'HJ' # CC potentials means J is on faces
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fieldsPair = Fields_CC
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def __init__(self, mesh, **kwargs):
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BaseDCProblem.__init__(self, mesh, **kwargs)
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def getA(self):
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"""
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Make the A matrix for the cell centered DC resistivity problem
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A = D MfRhoI D^\\top V
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"""
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# TODO: this won't work for full anisotropy
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D = self.mesh.faceDiv
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MfRhoI = self.MfRhoI
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V = self.Vol
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A = D * ( MfRhoI * ( D.T * V ) )
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if self._makeASymmetric is True:
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return V.T * A
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return A
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def getRHS(self):
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"""
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RHS for the DC problem
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q
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"""
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RHS = self.getSourceTerm()
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if self._makeASymmetric is True:
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return self.Vol.T * RHS
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return RHS
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