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https://github.com/wassname/simpeg.git
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GudniRos
65 lines
2.7 KiB
Python
65 lines
2.7 KiB
Python
import SimPEG as simpeg, numpy as np
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def homo1DModelSource(mesh,freq,sigma_1d):
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'''
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Function that calculates and return background fields
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:param Simpeg mesh object mesh: Holds information on the discretization
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:param float freq: The frequency to solve at
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:param np.array sigma_1d: Background model of conductivity to base the calculations on, 1d model.
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:rtype: numpy.ndarray (mesh.nE,2)
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:return: eBG_bp, E fields for the background model at both polarizations.
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'''
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# import
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from simpegMT.Utils import get1DEfields
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# Get a 1d solution for a halfspace background
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if mesh.dim == 1:
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mesh1d = mesh
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elif mesh.dim == 2:
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mesh1d = simpeg.Mesh.TensorMesh([mesh.hy],np.array([mesh.x0[1]]))
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elif mesh.dim == 3:
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mesh1d = simpeg.Mesh.TensorMesh([mesh.hz],np.array([mesh.x0[2]]))
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# # Note: Everything is using e^iwt
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e0_1d = get1DEfields(mesh1d,sigma_1d,freq)
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if mesh.dim == 1:
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eBG_px = simpeg.mkvc(e0_1d,2)
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eBG_py = -simpeg.mkvc(e0_1d,2) # added a minus to make the results in the correct quadrents.
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elif mesh.dim == 2:
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ex_px = np.zeros(mesh.vnEx,dtype=complex)
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ey_px = np.zeros((mesh.nEy,1),dtype=complex)
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for i in np.arange(mesh.vnEx[0]):
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ex_px[i,:] = -e0_1d
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eBG_px = np.vstack((simpeg.Utils.mkvc(ex_px,2),ey_px))
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# Setup y (north) polarization (_py)
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ex_py = np.zeros((mesh.nEx,1), dtype='complex128')
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ey_py = np.zeros(mesh.vnEy, dtype='complex128')
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# Assign the source to ey_py
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for i in np.arange(mesh.vnEy[0]):
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ey_py[i,:] = e0_1d
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# ey_py[1:-1,1:-1,1:-1] = 0
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eBG_py = np.vstack((ex_py,simpeg.Utils.mkvc(ey_py,2),ez_py))
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elif mesh.dim == 3:
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# Setup x (east) polarization (_x)
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ex_px = np.zeros(mesh.vnEx,dtype=complex)
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ey_px = np.zeros((mesh.nEy,1),dtype=complex)
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ez_px = np.zeros((mesh.nEz,1),dtype=complex)
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# Assign the source to ex_x
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for i in np.arange(mesh.vnEx[0]):
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for j in np.arange(mesh.vnEx[1]):
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ex_px[i,j,:] = -e0_1d
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eBG_px = np.vstack((simpeg.Utils.mkvc(ex_px,2),ey_px,ez_px))
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# Setup y (north) polarization (_py)
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ex_py = np.zeros((mesh.nEx,1), dtype='complex128')
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ey_py = np.zeros(mesh.vnEy, dtype='complex128')
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ez_py = np.zeros((mesh.nEz,1), dtype='complex128')
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# Assign the source to ey_py
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for i in np.arange(mesh.vnEy[0]):
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for j in np.arange(mesh.vnEy[1]):
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ey_py[i,j,:] = e0_1d
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# ey_py[1:-1,1:-1,1:-1] = 0
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eBG_py = np.vstack((ex_py,simpeg.Utils.mkvc(ey_py,2),ez_py))
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# Return the electric fields
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eBG_bp = np.hstack((eBG_px,eBG_py))
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return eBG_bp |