132 lines
2.8 KiB
Python
132 lines
2.8 KiB
Python
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def setup_case():
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import numpy as np
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import sys
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########### section 1 choice of differencing scheme ###########
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scheme='h' #hybrid
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scheme_turb='h' #hybrid upwind-central
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########### section 2 turbulence models ###########
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cmu=0.09
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kom = True
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c_omega_1= 5./9.
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c_omega_2=3./40.
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prand_omega=2.0
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prand_k=2.0
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########### section 3 restart/save ###########
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restart = False
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save = True
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########### section 4 fluid properties ###########
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viscos=3.57E-5
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########### section 5 relaxation factors ###########
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urfvis=0.5
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urf_vel=0.5
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urf_k=0.5
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urf_p=1.0
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urf_omega=0.5
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########### section 6 number of iteration and convergence criterira ###########
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maxit=2000
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min_iter=1
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sormax=5e-5
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solver_vel='lgmres'
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solver_pp='pyamg'
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solver_turb='gmres'
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nsweep_vel=50
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nsweep_pp=50
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nsweep_kom=50
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convergence_limit_u=1e-6
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convergence_limit_v=1e-6
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convergence_limit_k=-1e-6 # use absolute conv. criterion
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convergence_limit_om=-1e-6 # use absolute conv. criterion
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convergence_limit_pp=5e-2
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########### section 7 all variables are printed during the iteration at node ###########
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imon=ni-10
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jmon=int(nj/2)
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########### section 8 save data for post-processing ###########
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vtk=False
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save_all_files=False
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vtk_file_name='bound'
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########### section 9 residual scaling parameters ###########
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uin=1
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resnorm_p=uin*y2d[1,-1]
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resnorm_vel=uin**2*y2d[1,-1]
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########### Section 10 boundary conditions ###########
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# boundary conditions for u
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u_bc_west=np.ones(nj)
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u_bc_east=np.zeros(nj)
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u_bc_south=np.zeros(ni)
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u_bc_north=np.zeros(ni)
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u_bc_west_type='d'
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u_bc_east_type='n'
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u_bc_south_type='d'
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u_bc_north_type='n'
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# boundary conditions for v
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v_bc_west=np.zeros(nj)
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v_bc_east=np.zeros(nj)
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v_bc_south=np.zeros(ni)
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v_bc_north=np.zeros(ni)
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v_bc_west_type='d'
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v_bc_east_type='n'
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v_bc_south_type='d'
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v_bc_north_type='d'
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# boundary conditions for p
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p_bc_west=np.zeros(nj)
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p_bc_east=np.zeros(nj)
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p_bc_south=np.zeros(ni)
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p_bc_north=np.zeros(ni)
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p_bc_west_type='n'
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p_bc_east_type='n'
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p_bc_south_type='n'
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p_bc_north_type='n'
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# boundary conditions for k
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k_bc_west=np.ones(nj)*1e-2
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k_bc_west[10:]=1e-5
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k_bc_east=np.zeros(nj)
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k_bc_south=np.zeros(ni)
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k_bc_north=np.ones(ni)*1e-5
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k_bc_west_type='d'
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k_bc_east_type='n'
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k_bc_south_type='d'
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k_bc_north_type='n'
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# boundary conditions for omega
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om_bc_west=np.ones(nj)
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om_bc_east=np.zeros(nj)
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om_bc_south=np.zeros(ni)
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om_bc_north=np.zeros(ni)
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xwall_s=0.5*(x2d[0:-1,0]+x2d[1:,0])
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ywall_s=0.5*(y2d[0:-1,0]+y2d[1:,0])
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dist2_s=(yp2d[:,0]-ywall_s)**2+(xp2d[:,0]-xwall_s)**2
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om_bc_south=6*viscos/0.075/dist2_s
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om_bc_west_type='d'
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om_bc_east_type='n'
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om_bc_south_type='d'
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om_bc_north_type='n'
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return
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