def test_validation2DWaveSystemPStag_squares(scaling):
start = time.time()
#### 2D square mesh
meshList = [7, 15, 31, 51, 81, 101]
#meshList=['squareWithSquares_1','squareWithSquares_2','squareWithSquares_3','squareWithSquares_4','squareWithSquares_5']
mesh_path = '../../ressources/2DCartesien/'
meshType = "Regular squares"
testColor = "Green"
nbMeshes = len(meshList)
mesh_size_tab = [0] * nbMeshes
mesh_name = 'squareWithSquares'
resolution = 100
curv_abs = np.linspace(0, sqrt(2), resolution + 1)
error_p_tab = [0] * nbMeshes
error_u_tab = [0] * nbMeshes
diag_data_press = [0] * nbMeshes
diag_data_vel = [0] * nbMeshes
time_tab = [0] * nbMeshes
t_final = [0] * nbMeshes
ndt_final = [0] * nbMeshes
max_vel = [0] * nbMeshes
cond_number = [0] * nbMeshes
plt.close('all')
i = 0
cfl = 0.5
# Storing of numerical errors, mesh sizes and diagonal values
#for filename in meshList:
for nx in meshList:
my_mesh = cdmath.Mesh(0, 1, nx, 0, 1, nx)
error_p_tab[i], error_u_tab[i], mesh_size_tab[i], t_final[
i], ndt_final[i], max_vel[i], diag_data_press[i], diag_data_vel[
i], time_tab[i], cond_number[i] = WaveSystemPStag.solve(
my_mesh,
str(nx) + 'x' + str(nx), resolution, scaling, meshType,
testColor, cfl)
#error_p_tab[i], error_u_tab[i], mesh_size_tab[i], t_final[i], ndt_final[i], max_vel[i], diag_data_press[i], diag_data_vel[i], time_tab[i], cond_number[i] =WaveSystemPStag.solve_file(mesh_path+filename, mesh_name, resolution,scaling,meshType,testColor,cfl)
assert max_vel[i] > 0.8 and max_vel[i] < 1.03
error_p_tab[i] = log10(error_p_tab[i])
error_u_tab[i] = log10(error_u_tab[i])
time_tab[i] = log10(time_tab[i])
i = i + 1
end = time.time()
# Plot over diagonal line
for i in range(nbMeshes):
if (scaling == 0):
plt.plot(curv_abs,
diag_data_press[i],
label=str(mesh_size_tab[i]) + ' cells - no scaling')
else:
plt.plot(curv_abs,
diag_data_press[i],
label=str(mesh_size_tab[i]) + ' cells - with scaling')
plt.legend()
plt.xlabel('Position on diagonal line')
plt.ylabel('Pressure on diagonal line')
plt.title(
'Plot over diagonal line for stationary wave system \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + '_Pressure_2DWaveSystemSquaresPStag_' + "scaling" +
str(scaling) + "_PlotOverDiagonalLine.png")
plt.close()
plt.clf()
for i in range(nbMeshes):
if (scaling == 0):
plt.plot(curv_abs,
diag_data_vel[i],
label=str(mesh_size_tab[i]) + ' cells - no scaling')
else:
plt.plot(curv_abs,
diag_data_vel[i],
label=str(mesh_size_tab[i]) + ' cells - with scaling')
plt.legend()
plt.xlabel('Position on diagonal line')
plt.ylabel('Velocity on diagonal line')
plt.title(
'Plot over diagonal line for the stationary wave system \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + "_Velocity_2DWaveSystemSquaresPStag_" + "scaling" +
str(scaling) + "_PlotOverDiagonalLine.png")
plt.close()
# Plot of number of time steps
plt.close()
if (scaling == 0):
plt.plot(
mesh_size_tab,
ndt_final,
label='Number of time step to reach stationary regime - no scaling'
)
else:
plt.plot(
mesh_size_tab,
ndt_final,
label=
'Number of time step to reach stationary regime - with scaling')
plt.legend()
plt.xlabel('number of cells')
plt.ylabel('Max time steps for stationary regime')
plt.title(
'Number of times steps required for the stationary Wave System \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + "_2DWaveSystemSquarePStag_" + "scaling" +
str(scaling) + "_TimeSteps.png")
# Plot of number of stationary time
plt.close()
if (scaling == 0):
plt.plot(mesh_size_tab,
t_final,
label='Time where stationary regime is reached - no scaling')
else:
plt.plot(
mesh_size_tab,
t_final,
label='Time where stationary regime is reached - with scaling')
plt.legend()
plt.xlabel('number of cells')
plt.ylabel('Max time for stationary regime')
plt.title(
'Simulated time for the stationary Wave System \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + "_2DWaveSystemSquaresPStag_" + "scaling" +
str(scaling) + "_FinalTime.png")
# Plot of number of maximal velocity norm
plt.close()
if (scaling == 0):
plt.plot(mesh_size_tab,
max_vel,
label='Maximum velocity norm - no scaling')
else:
plt.plot(mesh_size_tab,
max_vel,
label='Maximum velocity norm - with scaling')
plt.legend()
plt.xlabel('number of cells')
plt.ylabel('Max velocity norm')
plt.title(
'Maximum velocity norm for the stationary Wave System \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + "_2DWaveSystemSquaresPStag_" + "scaling" +
str(scaling) + "_MaxVelNorm.png")
# Plot of condition number
plt.close()
if (scaling == 0):
plt.plot(mesh_size_tab,
cond_number,
label='Condition number - no scaling')
else:
plt.plot(mesh_size_tab,
cond_number,
label='Condition number - with scaling')
plt.legend()
plt.xlabel('number of cells')
plt.ylabel('Condition number')
plt.title(
'Condition number for the stationary Wave System \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + "_2DWaveSystemSquaresPStag_" + "scaling" +
str(scaling) + "_condition_number.png")
for i in range(nbMeshes):
mesh_size_tab[i] = 0.5 * log10(mesh_size_tab[i])
# Least square linear regression
# Find the best a,b such that f(x)=ax+b best approximates the convergence curve
# The vector X=(a,b) solves a symmetric linear system AX=B with A=(a1,a2\\a2,a3), B=(b1,b2)
a1 = np.dot(mesh_size_tab, mesh_size_tab)
a2 = np.sum(mesh_size_tab)
a3 = nbMeshes
det = a1 * a3 - a2 * a2
assert det != 0, 'test_validation2DWaveSystemSquaresFVPStag_squares() : Make sure you use distinct meshes and at least two meshes'
b1p = np.dot(error_p_tab, mesh_size_tab)
b2p = np.sum(error_p_tab)
ap = (a3 * b1p - a2 * b2p) / det
bp = (-a2 * b1p + a1 * b2p) / det
if (scaling == 0):
print "FV PStag on 2D square meshes : scheme order for pressure without scaling is ", -ap
else:
print "FV PStag on 2D square meshes : scheme order for pressure with scaling is ", -ap
b1u = np.dot(error_u_tab, mesh_size_tab)
b2u = np.sum(error_u_tab)
au = (a3 * b1u - a2 * b2u) / det
bu = (-a2 * b1u + a1 * b2u) / det
if (scaling == 0):
print "FVPStag on 2D square meshes : scheme order for velocity without scaling is ", -au
else:
print "FVPStag on 2D square meshes : scheme order for velocity with scaling is ", -au
# Plot of convergence curves
plt.close()
if (scaling == 0):
plt.plot(mesh_size_tab,
error_p_tab,
label='|error on stationary pressure| - no scaling')
else:
plt.plot(mesh_size_tab,
error_p_tab,
label='|error on stationary pressure| - with scaling')
plt.legend()
plt.xlabel('1/2 log(number of cells)')
plt.ylabel('log(|error p|)')
plt.title(
'Convergence of finite volumes for the stationary Wave System \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + "_Pressure_2DWaveSystemSquaresPStag_" + "scaling" +
str(scaling) + "_ConvergenceCurve.png")
plt.close()
if (scaling == 0):
plt.plot(mesh_size_tab,
error_u_tab,
label='log(|error on stationary velocity|) - no scaling')
else:
plt.plot(mesh_size_tab,
error_u_tab,
label='log(|error on stationary velocity|) - with scaling')
plt.legend()
plt.xlabel('1/2 log(number of cells)')
plt.ylabel('log(|error u|)')
plt.title(
'Convergence of finite volumes for the stationary Wave System \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + "_Velocity_2DWaveSystemSquaresPStag_" + "scaling" +
str(scaling) + "_ConvergenceCurve.png")
# Plot of computational time
plt.close()
if (scaling == 0):
plt.plot(mesh_size_tab, time_tab, label='log(cpu time) - no scaling')
else:
plt.plot(mesh_size_tab, time_tab, label='log(cpu time) - with scaling')
plt.legend()
plt.xlabel('1/2 log(number of cells)')
plt.ylabel('log(cpu time)')
plt.title(
'Computational time of finite volumes for the stationary Wave System \n with pseudo staggered scheme on 2D square meshes'
)
plt.savefig(mesh_name + "2DWaveSystemSquaresPStag_" + "scaling" +
str(scaling) + "_ComputationalTimeSquares.png")
plt.close('all')
convergence_synthesis = {}
convergence_synthesis["PDE_model"] = "Wave system"
convergence_synthesis["PDE_is_stationary"] = False
convergence_synthesis["PDE_search_for_stationary_solution"] = True
if (scaling == 0):
convergence_synthesis["Numerical_method_name"] = "PStag no scaling"
else:
convergence_synthesis["Numerical_method_name"] = "PStag scaling"
convergence_synthesis[
"Numerical_method_space_discretization"] = "Finite volumes"
convergence_synthesis["Numerical_method_time_discretization"] = "Implicit"
convergence_synthesis[
"Initial_data"] = "Constant pressure, divergence free velocity"
convergence_synthesis["Boundary_conditions"] = "Periodic"
convergence_synthesis["Numerical_parameter_cfl"] = cfl
convergence_synthesis["Space_dimension"] = 2
convergence_synthesis["Mesh_dimension"] = 2
convergence_synthesis["Mesh_names"] = meshList
convergence_synthesis["Mesh_type"] = meshType
convergence_synthesis["Mesh_path"] = mesh_path
convergence_synthesis["Mesh_description"] = mesh_name
convergence_synthesis["Mesh_sizes"] = mesh_size_tab
convergence_synthesis["Mesh_cell_type"] = "Squares"
convergence_synthesis["Numerical_error_velocity"] = error_u_tab
convergence_synthesis["Numerical_error_pressure"] = error_p_tab
convergence_synthesis["Max_vel_norm"] = max_vel
convergence_synthesis["Final_time"] = t_final
convergence_synthesis["Final_time_step"] = ndt_final
convergence_synthesis["Scheme_order"] = min(-au, -ap)
convergence_synthesis["Scheme_order_vel"] = -au
convergence_synthesis["Scheme_order_press"] = -ap
convergence_synthesis["Scaling_preconditioner"] = scaling
convergence_synthesis["Condition_numbers"] = cond_number
convergence_synthesis["Test_color"] = testColor
convergence_synthesis["Computational_time"] = end - start
with open('Convergence_WaveSystem_2DFV_PStag_' + mesh_name + '.json',
'w') as outfile:
json.dump(convergence_synthesis, outfile)
def test_validation2DWaveSystemPStagCheckerboard(scaling):
start = time.time()
#### 2D checkerboard mesh
meshList=['checkerboard_5x5','checkerboard_9x9','checkerboard_17x17','checkerboard_33x33']#,'checkerboard_65x65'
meshType="Regular checkerboard"
testColor="Green"
nbMeshes=len(meshList)
error_p_tab=[0]*nbMeshes
error_u_tab=[0]*nbMeshes
mesh_size_tab=[0]*nbMeshes
mesh_path='../../../ressources/2DCheckerboard/'
mesh_name='squareWithCheckerboard'
diag_data_press=[0]*nbMeshes
diag_data_vel=[0]*nbMeshes
time_tab=[0]*nbMeshes
t_final=[0]*nbMeshes
ndt_final=[0]*nbMeshes
max_vel=[0]*nbMeshes
resolution=100
curv_abs=np.linspace(0,sqrt(2),resolution+1)
cond_number=[0]*nbMeshes
plt.close('all')
i=0
cfl=0.5
# Storing of numerical errors, mesh sizes and diagonal values
for filename in meshList:
error_p_tab[i], error_u_tab[i], mesh_size_tab[i], t_final[i], ndt_final[i], max_vel[i], diag_data_press[i], diag_data_vel[i], time_tab[i], cond_number[i] =WaveSystemPStag.solve_file(mesh_path+filename, mesh_name, resolution,scaling,meshType,testColor,cfl,"Periodic")
assert max_vel[i]>0.98 and max_vel[i]<1.3
error_p_tab[i]=log10(error_p_tab[i])
error_u_tab[i]=log10(error_u_tab[i])
time_tab[i]=log10(time_tab[i])
i=i+1
end = time.time()
# Plot over diagonal line
for i in range(nbMeshes):
if(scaling==0):
plt.plot(curv_abs, diag_data_press[i], label= str(mesh_size_tab[i]) + ' cells - no scaling')
else:
plt.plot(curv_abs, diag_data_press[i], label= str(mesh_size_tab[i]) + ' cells - with scaling')
plt.legend()
plt.xlabel('Position on diagonal line')
plt.ylabel('Pressure on diagonal line')
plt.title('Plot over diagonal line for stationary wave system \n with pseudo staggered scheme on 2D checkerboard meshes')
plt.savefig(mesh_name+'_Pressure_2DWaveSystemPStag_'+"scaling"+str(scaling)+"_PlotOverDiagonalLine.png")
plt.close()
plt.clf()
for i in range(nbMeshes):
if(scaling==0):
plt.plot(curv_abs, diag_data_vel[i], label= str(mesh_size_tab[i]) + ' cells - no scaling')
else:
plt.plot(curv_abs, diag_data_vel[i], label= str(mesh_size_tab[i]) + ' cells - with scaling')
plt.legend()
plt.xlabel('Position on diagonal line')
plt.ylabel('Velocity on diagonal line')
plt.title('Plot over diagonal line for the stationary wave system \n with pseudo staggered scheme on 2D checkerboard meshes')
plt.savefig(mesh_name+"_Velocity_2DWaveSystemPStag_"+"scaling"+str(scaling)+"_PlotOverDiagonalLine.png")
plt.close()
# Plot of number of time steps
plt.close()
if(scaling==0):
plt.plot(mesh_size_tab, ndt_final, label='Number of time step to reach stationary regime - no scaling')
else:
plt.plot(mesh_size_tab, ndt_final, label='Number of time step to reach stationary regime - with scaling')
plt.legend()
plt.xlabel('Number of cells')
plt.ylabel('Max time steps for stationary regime')
plt.title('Number of times steps required for the stationary Wave System \n with pseudo staggered scheme on 2D checkerboard meshes')
plt.savefig(mesh_name+"_2DWaveSystemPStag_"+"scaling"+str(scaling)+"_TimeSteps.png")
# Plot of number of stationary time
plt.close()
if(scaling==0):
plt.plot(mesh_size_tab, t_final, label='Time where stationary regime is reached - no scaling')
else:
plt.plot(mesh_size_tab, t_final, label='Time where stationary regime is reached - with scaling')
plt.legend()
plt.xlabel('Number of cells')
plt.ylabel('Max time for stationary regime')
plt.title('Simulated time for the stationary Wave System \n with pseudo staggered scheme on 2D checkerboard meshes')
plt.savefig(mesh_name+"_2DWaveSystemPStag_"+"scaling"+str(scaling)+"TimeFinal.png")
# Plot of number of maximal velocity norm
plt.close()
if(scaling==0):
plt.plot(mesh_size_tab, max_vel, label='Maximum velocity norm - no scaling')
else:
plt.plot(mesh_size_tab, max_vel, label='Maximum velocity norm - with scaling')
plt.legend()
plt.xlabel('Number of cells')
plt.ylabel('Max velocity norm')
plt.title('Maximum velocity norm for the stationary Wave System \n with pseudo staggered scheme on 2D checkerboard meshes')
plt.savefig(mesh_name+"_2DWaveSystemCPStag_"+"scaling"+str(scaling)+"_MaxVelNorm.png")
# Plot of condition number
plt.close()
if(scaling==0):
plt.plot(mesh_size_tab, cond_number, label='Condition number - no scaling')
else:
plt.plot(mesh_size_tab, cond_number, label='Condition number - with scaling')
plt.legend()
plt.xlabel('Number of cells')
plt.ylabel('Condition number')
plt.title('Condition number for the stationary Wave System \n with pseudo staggered scheme on 2D square meshes')
plt.savefig(mesh_name+"_2DWaveSystemPStag_"+"scaling"+str(scaling)+"_condition_number.png")
for i in range(nbMeshes):
mesh_size_tab[i]=0.5*log10(mesh_size_tab[i])
# Least square linear regression
# Find the best a,b such that f(x)=ax+b best approximates the convergence curve
# The vector X=(a,b) solves a symmetric linear system AX=B with A=(a1,a2\\a2,a3), B=(b1,b2)
a1=np.dot(mesh_size_tab,mesh_size_tab)
a2=np.sum(mesh_size_tab)
a3=nbMeshes
det=a1*a3-a2*a2
assert det!=0, 'test_validation2DWaveSystemPStagCheckerboardFV() : Make sure you use distinct meshes and at least two meshes'
b1p=np.dot(error_p_tab,mesh_size_tab)
b2p=np.sum(error_p_tab)
ap=( a3*b1p-a2*b2p)/det
bp=(-a2*b1p+a1*b2p)/det
if(scaling==0):
print "FV pseudo staggered on 2D checkerboard meshes : scheme order for pressure without scaling is ", -ap
else:
print "FV pseudo staggered on 2D checkerboard meshes : scheme order for pressure with scaling is ", -ap
b1u=np.dot(error_u_tab,mesh_size_tab)
b2u=np.sum(error_u_tab)
au=( a3*b1u-a2*b2u)/det
bu=(-a2*b1u+a1*b2u)/det
if(scaling==0):
print "FV pseudo staggered on 2D checkerboard meshes : scheme order for velocity without scaling is ", -au
else:
print "FV pseudo staggered on 2D checkerboard meshes : scheme order for velocity with scaling is ", -au
# Plot of convergence curves
plt.close()
if(scaling==0):
plt.plot(mesh_size_tab, error_p_tab, label='|error on stationary pressure| - no scaling')
else:
plt.plot(mesh_size_tab, error_p_tab, label='|error on stationary pressure| - with scaling')
plt.legend()
plt.xlabel('1/2 log(Number of cells)')
plt.ylabel('log(Error p)')
plt.title('Convergence of finite volumes for the stationary Wave System \n with pseudo staggered scheme on 2D checkerboard meshes')
plt.savefig(mesh_name+"_Pressure_2DWaveSystemPStag_"+"scaling"+str(scaling)+"_ConvergenceCurve.png")
plt.close()
if(scaling==0):
plt.plot(mesh_size_tab, error_u_tab, label='log(|error on stationary velocity|) - no scaling')
else:
plt.plot(mesh_size_tab, error_u_tab, label='log(|error on stationary velocity|) - with scaling')
plt.legend()
plt.xlabel('1/2 log(Number of cells)')
plt.ylabel('log(Error u)')
plt.title('Convergence of finite volumes for the stationary Wave System \n with pseudo staggered scheme on 2D checkerboard meshes')
plt.savefig(mesh_name+"_Velocity_2DWaveSystemPStag_"+"scaling"+str(scaling)+"_ConvergenceCurve.png")
# Plot of computational time
plt.close()
if(scaling==0):
plt.plot(mesh_size_tab, time_tab, label='log(cpu time) - no scaling')
else:
plt.plot(mesh_size_tab, time_tab, label='log(cpu time) - with scaling')
plt.legend()
plt.xlabel('1/2 log(Number of cells)')
plt.ylabel('log(cpu time)')
plt.title('Computational time of finite volumes for the stationary Wave System \n with pseudo staggered scheme on 2D checkerboard meshes')
plt.savefig(mesh_name+"_2DWaveSystemPStag_"+"scaling"+str(scaling)+"_ComputationalTime.png")
plt.close('all')
convergence_synthesis={}
convergence_synthesis["PDE_model"]="Wave system"
convergence_synthesis["PDE_is_stationary"]=False
convergence_synthesis["PDE_search_for_stationary_solution"]=True
convergence_synthesis["Numerical_method_name"]="PStag"
convergence_synthesis["Numerical_method_space_discretization"]="Finite volumes"
convergence_synthesis["Numerical_method_time_discretization"]="Implicit"
convergence_synthesis["Initial_data"]="Constant pressure, divergence free velocity"
convergence_synthesis["Boundary_conditions"]="Periodic"
convergence_synthesis["Numerical_parameter_cfl"]=cfl
convergence_synthesis["Space_dimension"]=2
convergence_synthesis["Mesh_dimension"]=2
convergence_synthesis["Mesh_names"]=meshList
convergence_synthesis["Mesh_type"]=meshType
convergence_synthesis["Mesh_path"]=mesh_path
convergence_synthesis["Mesh_description"]=mesh_name
convergence_synthesis["Mesh_sizes"]=mesh_size_tab
convergence_synthesis["Mesh_cell_type"]="Squares"
convergence_synthesis["Numerical_error_velocity"]=error_u_tab
convergence_synthesis["Numerical_error_pressure"]=error_p_tab
convergence_synthesis["Max_vel_norm"]=max_vel
convergence_synthesis["Final_time"]=t_final
convergence_synthesis["Final_time_step"]=ndt_final
convergence_synthesis["Scheme_order"]=min(-au,-ap)
convergence_synthesis["Scheme_order_vel"]=-au
convergence_synthesis["Scheme_order_press"]=-ap
convergence_synthesis["Scaling_preconditioner"]="None"
convergence_synthesis["Test_color"]=testColor
convergence_synthesis["Computational_time"]=end-start
with open('Convergence_WaveSystem_2DFV_PStag_'+mesh_name+'.json', 'w') as outfile:
json.dump(convergence_synthesis, outfile)
def test_validation2DWaveSystemPStagHexagons(bctype, scaling):
start = time.time()
#### 2D hexagonal mesh
meshList = [
'squareWithHexagons_1', 'squareWithHexagons_2', 'squareWithHexagons_3',
'squareWithHexagons_4'
] #,'squareWithHexagons_5'
meshType = "Regular hexagons"
testColor = "Orange : Pb with wall BC (no mass conservation)"
nbMeshes = len(meshList)
error_p_tab = [0] * nbMeshes
error_u_tab = [0] * nbMeshes
mesh_size_tab = [0] * nbMeshes
mesh_path = '../../../ressources/2DHexagons/'
mesh_name = 'squareWithHexagons'
diag_data_press = [0] * nbMeshes
diag_data_vel = [0] * nbMeshes
time_tab = [0] * nbMeshes
t_final = [0] * nbMeshes
ndt_final = [0] * nbMeshes
max_vel = [0] * nbMeshes
cond_number = [0] * nbMeshes
resolution = 100
curv_abs = np.linspace(0, sqrt(2), resolution + 1)
plt.close('all')
i = 0
cfl = 0.5
# Storing of numerical errors, mesh sizes and diagonal values
for filename in meshList:
error_p_tab[i], error_u_tab[i], mesh_size_tab[i], t_final[
i], ndt_final[i], max_vel[i], diag_data_press[i], diag_data_vel[
i], time_tab[i], cond_number[i] = WaveSystemPStag.solve_file(
mesh_path + filename, mesh_name, resolution, scaling,
meshType, testColor, cfl, bctype)
assert max_vel[i] > 0.0001 and max_vel[i] < 1
error_p_tab[i] = log10(error_p_tab[i])
error_u_tab[i] = log10(error_u_tab[i])
time_tab[i] = log10(time_tab[i])
i = i + 1
end = time.time()
# Plot over diagonal line
for i in range(nbMeshes):
plt.plot(curv_abs,
diag_data_press[i],
label=str(mesh_size_tab[i]) + ' cells')
plt.legend()
plt.xlabel('Position on diagonal line')
plt.ylabel('Pressure on diagonal line')
plt.title(
'Plot over diagonal line for stationary wave system \n with PStag scheme on 2D hexagonal meshes'
)
plt.savefig(mesh_name + '_Pressure_2DWaveSystemPStag_' +
"PlotOverDiagonalLine.png")
plt.close()
plt.clf()
for i in range(nbMeshes):
plt.plot(curv_abs,
diag_data_vel[i],
label=str(mesh_size_tab[i]) + ' cells')
plt.legend()
plt.xlabel('Position on diagonal line')
plt.ylabel('Velocity on diagonal line')
plt.title(
'Plot over diagonal line for the stationary wave system \n with PStag scheme on 2D hexagonal meshes'
)
plt.savefig(mesh_name + "_Velocity_2DWaveSystemPStag_" +
"PlotOverDiagonalLine.png")
plt.close()
# Plot of number of time steps
plt.close()
plt.plot(mesh_size_tab,
ndt_final,
label='Number of time step to reach stationary regime')
plt.legend()
plt.xlabel('Number of cells')
plt.ylabel('Max time steps for stationary regime')
plt.title(
'Number of times steps required for the stationary Wave System \n with PStag scheme on 2D hexagonal meshes'
)
plt.savefig(mesh_name + "_2DWaveSystemPStag_" + "TimeSteps.png")
# Plot of number of stationary time
plt.close()
plt.plot(mesh_size_tab,
t_final,
label='Time where stationary regime is reached')
plt.legend()
plt.xlabel('Number of cells')
plt.ylabel('Max time for stationary regime')
plt.title(
'Simulated time for the stationary Wave System \n with PStag scheme on 2D hexagonal meshes'
)
plt.savefig(mesh_name + "_2DWaveSystemPStag_" + "TimeFinal.png")
# Plot of number of maximal velocity norm
plt.close()
plt.plot(mesh_size_tab, max_vel, label='Maximum velocity norm')
plt.legend()
plt.xlabel('Number of cells')
plt.ylabel('Max velocity norm')
plt.title(
'Maximum velocity norm for the stationary Wave System \n with PStag scheme on 2D hexagonal meshes'
)
plt.savefig(mesh_name + "_2DWaveSystemPStag_" + "MaxVelNorm.png")
for i in range(nbMeshes):
mesh_size_tab[i] = 0.5 * log10(mesh_size_tab[i])
# Least square linear regression
# Find the best a,b such that f(x)=ax+b best approximates the convergence curve
# The vector X=(a,b) solves a symmetric linear system AX=B with A=(a1,a2\\a2,a3), B=(b1,b2)
a1 = np.dot(mesh_size_tab, mesh_size_tab)
a2 = np.sum(mesh_size_tab)
a3 = nbMeshes
det = a1 * a3 - a2 * a2
assert det != 0, 'test_validation2DWaveSystemPStagHexagonsFV() : Make sure you use distinct meshes and at least two meshes'
b1p = np.dot(error_p_tab, mesh_size_tab)
b2p = np.sum(error_p_tab)
ap = (a3 * b1p - a2 * b2p) / det
bp = (-a2 * b1p + a1 * b2p) / det
print("FV PStag on 2D hexagonal meshes : scheme order for pressure is ",
-ap)
b1u = np.dot(error_u_tab, mesh_size_tab)
b2u = np.sum(error_u_tab)
au = (a3 * b1u - a2 * b2u) / det
bu = (-a2 * b1u + a1 * b2u) / det
print("FV PStag on 2D hexagonal meshes : scheme order for velocity is ",
-au)
# Plot of convergence curves
plt.close()
plt.plot(mesh_size_tab,
error_p_tab,
label='|error on stationary pressure|')
plt.legend()
plt.xlabel('1/2 log(number of cells)')
plt.ylabel('log(error p)')
plt.title(
'Convergence of finite volumes for the stationary Wave System \n with PStag scheme on 2D hexagonal meshes'
)
plt.savefig(mesh_name + "_Pressure_2DWaveSystemPStag_" +
"ConvergenceCurve.png")
plt.close()
plt.plot(mesh_size_tab,
error_u_tab,
label='|error on stationary velocity|')
plt.legend()
plt.xlabel('1/2 log(number of cells)')
plt.ylabel('log(error u)')
plt.title(
'Convergence of finite volumes for the stationary Wave System \n with PStag scheme on 2D hexagonal meshes'
)
plt.savefig(mesh_name + "_Velocity_2DWaveSystemPStag_" +
"ConvergenceCurve.png")
# Plot of computational time
plt.close()
plt.plot(mesh_size_tab, time_tab, label='log(cpu time)')
plt.legend()
plt.xlabel('1/2 log(number of cells)')
plt.ylabel('log(cpu time)')
plt.title(
'Computational time of finite volumes for the stationary Wave System \n with PStag scheme on 2D hexagonal meshes'
)
plt.savefig(mesh_name + "_2DWaveSystemPStag_ComputationalTime.png")
plt.close('all')
convergence_synthesis = {}
convergence_synthesis["PDE_model"] = "Wave system"
convergence_synthesis["PDE_is_stationary"] = False
convergence_synthesis["PDE_search_for_stationary_solution"] = True
convergence_synthesis["Numerical_method_name"] = "PStag"
convergence_synthesis[
"Numerical_method_space_discretization"] = "Finite volumes"
convergence_synthesis["Numerical_method_time_discretization"] = "Implicit"
convergence_synthesis[
"Initial_data"] = "Constant pressure, divergence free velocity"
convergence_synthesis["Boundary_conditions"] = "Periodic"
convergence_synthesis["Numerical_parameter_cfl"] = cfl
convergence_synthesis["Space_dimension"] = 2
convergence_synthesis["Mesh_dimension"] = 2
convergence_synthesis["Mesh_names"] = meshList
convergence_synthesis["Mesh_type"] = meshType
convergence_synthesis["Mesh_path"] = mesh_path
convergence_synthesis["Mesh_description"] = mesh_name
convergence_synthesis["Mesh_sizes"] = mesh_size_tab
convergence_synthesis["Mesh_cell_type"] = "Hexagons"
convergence_synthesis["Numerical_error_velocity"] = error_u_tab
convergence_synthesis["Numerical_error_pressure"] = error_p_tab
convergence_synthesis["Max_vel_norm"] = max_vel
convergence_synthesis["Final_time"] = t_final
convergence_synthesis["Final_time_step"] = ndt_final
convergence_synthesis["Scheme_order"] = min(-au, -ap)
convergence_synthesis["Scheme_order_vel"] = -au
convergence_synthesis["Scheme_order_press"] = -ap
convergence_synthesis["Scaling_preconditioner"] = "None"
convergence_synthesis["Test_color"] = testColor
convergence_synthesis["Computational_time"] = end - start
with open('Convergence_WaveSystem_2DFV_PStag_' + mesh_name + '.json',
'w') as outfile:
json.dump(convergence_synthesis, outfile)
