def testAtten(self): print("\n========= INITIATING BEAM TEST ==========") width, dX = 50.0, 0.4 sNord = 8 attnMat = mx.mixedMat({'c12': 1.0}) attnMat.setDensity(2.24) print(attnMat.nDdict) mesh1D = sn.Mesh1Dsn([0, width], dX, attnMat, sN=sNord) # define fixed boundary cond srcStrength = 1.e6 # [n / cm**2-s] # energy distribution of source (all born at 0.1MeV srcEnergy = np.array([1.0, 0, 0.0, 0, 0, 0, 0, 0, 0, 0]) bcs = {0: {'fixN': (1, [srcStrength, srcEnergy])}, -1: {'vac': (2, 0)}} mesh1D.setBCs(bcs) for si in range(1): resid = mesh1D.sweepMesh(1) if resid < 1e-5: break scalarFlux = mesh1D.getScalarFlux() for g in range(len(srcEnergy)): sfp.plot1DScalarFlux(scalarFlux[:][:, g], np.arange(0, width, dX), label='Group ' + str(g + 1)) sfp.plot1DNeutronND(scalarFlux[:][:, g], np.arange(0, width, dX), g) flxPlt.plotFluxE(scalarFlux[-1][::-1]) # flux vs E at left edge # plot ord fluxes at leading edge ordFlux = mesh1D.getOrdFlux() angles = np.arccos(mesh1D.cells[0].sNmu) g = 2 mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :]) pof.compass(angles, mag, figName='polar_grp3') # plot ord fluxes at mid plane g = 3 mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :]) pof.compass(angles, mag, figName='polar_grp4')
def testAtten(self): print("\n========= INITIATING MULT REGION BEAM TEST ==========") sNord = 18 # define fixed source boundary cond srcStrength = 1.e6 # [n / cm**2-s] # energy distribution of source (all born at 0.1MeV srcEnergy = np.array([1.0, 0, 0.0, 0, 0, 0, 0, 0, 0, 0]) # # ## REGION 1 - GRAPHITE ### width1, dX1 = 25.0, 1.0 region1Mat = mx.mixedMat({'c12': 1.0}) region1Mat.setDensity(1.96) region1mesh1D = sn.Mesh1Dsn([0, width1], dX1, region1Mat, sN=sNord) bcs1 = {0: {'fixN': (1, [srcStrength, srcEnergy])}} region1mesh1D.setBCs(bcs1) # ## REGION 2 - BORATED CARBON ### width2, dX2 = 25.0, 0.05 region2Mat = mx.mixedMat({'c12': 0.99, 'b10': 0.01}) region2Mat.setDensity(1.9) region2mesh1D = sn.Mesh1Dsn([width1 + dX1 / 2. + dX2 / 2., width1 + dX1 / 2. + dX2 / 2. + width2], dX2, region2Mat, sN=sNord) bcs2 = {-1: {'vac': (2, 0)}} region2mesh1D.setBCs(bcs2) # # ## BUILD DOMAIN ### domain = sn.SubDomain() domain.addRegion(region1mesh1D) domain.addRegion(region2mesh1D) domain.buildSweepTree() # # ## SWEEP DOMAIN ### for si in range(180): resid = domain.sweepSubDomain(1) if resid < 1e-5: break scalarFlux = domain.getScalarFlux() for g in range(len(srcEnergy)): pass flxPlt.plotFluxE(scalarFlux[-1][::-1]) # flux vs E at left edge centroids = [cell.centroid for cell in domain.regions[0].cells] centroids += [cell.centroid for cell in domain.regions[1].cells] for g in range(len(srcEnergy)): sfp.plot1DScalarFlux(scalarFlux[:][:, g], centroids, label='Group ' + str(g + 1)) # sfp.plot1DNeutronND(scalarFlux[:][:, g], centroids, g) # plot ord fluxes at leading edge ordFlux = domain.getOrdFlux() angles = np.arccos(domain.regions[0].cells[0].sNmu) g = 2 mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :]) pof.compass(angles, mag, figName='polar_grp3') # plot ord fluxes at mid plane g = 3 mag = ordFlux[1][g, 0, :] / sum(ordFlux[1][g, 0, :]) pof.compass(angles, mag, figName='polar_grp4')