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New example cases (#945)
Co-authored-by: Spencer Bryngelson <sbryngelson@gmail.com> Co-authored-by: Spencer Bryngelson <shb@gatech.edu>
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‎examples/2D_backward_facing_step/README.md‎

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# Backward Facing Step (2D)
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## Final Condition (Density)
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<img src="final.png"/>

‎examples/2D_backward_facing_step/case.py‎

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import json
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import math
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h = 0.0093
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Re = 5000
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gam_a = 1.4
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p0 = 101325
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rho0 = 1
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c0 = math.sqrt(gam_a * p0 / rho0)
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v0 = 3 * c0
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mu = v0 * h / Re
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# Configuring case dictionary
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print(
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json.dumps(
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{
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# Logistics
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"run_time_info": "T",
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"x_domain%beg": 0,
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"x_domain%end": 30 * h,
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"y_domain%beg": 0,
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"y_domain%end": 6 * h,
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"cyl_coord": "F",
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"m": 1999,
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"n": 399,
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"p": 0,
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"cfl_adap_dt": "T",
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"cfl_target": 0.5,
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"n_start": 0,
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"t_save": 100 * h / (100 * v0),
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"t_stop": 100 * h / v0,
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# Simulation Algorithm Parameters
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"num_patches": 1,
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"model_eqns": 2,
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"alt_soundspeed": "F",
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"num_fluids": 1,
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"mpp_lim": "F",
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"mixture_err": "F",
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"time_stepper": 3,
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"weno_order": 5,
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"weno_eps": 1.0e-16,
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"weno_avg": "T",
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"weno_Re_flux": "T",
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"avg_state": 2,
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"mapped_weno": "T",
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"null_weights": "F",
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"mp_weno": "T",
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"riemann_solver": 2,
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"wave_speeds": 1,
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"bc_x%beg": -11,
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"bc_x%end": -3,
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"bc_y%beg": -16,
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"bc_y%end": -3,
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"ib": "T",
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"num_ibs": 1,
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"viscous": "T",
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# Formatted Database Files Structure Parameters
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"format": 1,
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"precision": 2,
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"prim_vars_wrt": "T",
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"parallel_io": "T",
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# Fluid Patch: Background
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"patch_icpp(1)%geometry": 3,
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"patch_icpp(1)%x_centroid": 15 * h,
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"patch_icpp(1)%y_centroid": 3.5 * h,
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"patch_icpp(1)%length_x": 30 * h,
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"patch_icpp(1)%length_y": 7 * h,
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"patch_icpp(1)%vel(1)": v0,
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"patch_icpp(1)%vel(2)": 0.0,
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"patch_icpp(1)%pres": p0,
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"patch_icpp(1)%alpha_rho(1)": rho0,
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"patch_icpp(1)%alpha(1)": 1.0,
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# IB Patch: Step
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"patch_ib(1)%geometry": 3,
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"patch_ib(1)%x_centroid": 4 * h,
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"patch_ib(1)%y_centroid": 0 * h,
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"patch_ib(1)%length_x": 12 * h,
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"patch_ib(1)%length_y": 2 * h,
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"patch_ib(1)%slip": "T",
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# Fluids Physical Parameters
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"fluid_pp(1)%gamma": 1.0 / (gam_a - 1.0),
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"fluid_pp(1)%pi_inf": 0.0,
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"fluid_pp(1)%Re(1)": 1 / mu,
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},
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indent=4,
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)
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)

‎examples/2D_backward_facing_step/final.png‎

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‎examples/2D_forward_facing_step/README.md‎

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# Forward Facing Step (2D)
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Reference:
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> Woodward, P. *(1984). The numerical simulation of two-dimensional fluid flow with strong shocks. Journal of Computational Physics, 54(1), 115–173. https://doi.org/10.1016/0021-9991(84)90140-2*
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## Final Condition (Density)
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<img src="final.png"/>

‎examples/2D_forward_facing_step/case.py‎

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import json
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import math
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h = 0.2
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gam_a = 1.4
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p0 = 1
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rho0 = 1.4
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c0 = math.sqrt(gam_a * p0 / rho0)
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v0 = 3 * c0
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mu = rho0 * v0 * h / 2e5
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# Configuring case dictionary
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print(
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json.dumps(
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{
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# Logistics
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"run_time_info": "T",
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"x_domain%beg": 0,
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"x_domain%end": 15 * h,
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"y_domain%beg": 0,
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"y_domain%end": 5 * h,
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"cyl_coord": "F",
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"m": 1499,
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"n": 499,
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"p": 0,
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"cfl_adap_dt": "T",
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"cfl_target": 0.8,
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"n_start": 0,
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"t_save": 0.04,
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"t_stop": 4,
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# Simulation Algorithm Parameters
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"num_patches": 1,
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"model_eqns": 2,
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"alt_soundspeed": "F",
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"num_fluids": 1,
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"mpp_lim": "F",
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"mixture_err": "F",
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"time_stepper": 3,
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"weno_avg": "T",
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"weno_order": 5,
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"weno_eps": 1.0e-16,
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"avg_state": 2,
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"mapped_weno": "T",
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"null_weights": "F",
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"mp_weno": "T",
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"riemann_solver": 2,
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"wave_speeds": 1,
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"bc_x%beg": -3,
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"bc_x%end": -3,
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"bc_y%beg": -2,
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"bc_y%end": -2,
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"ib": "T",
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"num_ibs": 1,
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# Formatted Database Files Structure Parameters
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"format": 1,
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"precision": 2,
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"prim_vars_wrt": "T",
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"parallel_io": "T",
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# Patch 1 Background
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"patch_icpp(1)%geometry": 3,
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"patch_icpp(1)%x_centroid": 7.5 * h,
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"patch_icpp(1)%y_centroid": 2.5 * h,
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"patch_icpp(1)%length_x": 15 * h,
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"patch_icpp(1)%length_y": 5 * h,
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"patch_icpp(1)%vel(1)": v0,
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"patch_icpp(1)%vel(2)": 0.0,
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"patch_icpp(1)%pres": p0,
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"patch_icpp(1)%alpha_rho(1)": rho0,
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"patch_icpp(1)%alpha(1)": 1.0,
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# Patch: No slip rectangle
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"patch_ib(1)%geometry": 3,
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"patch_ib(1)%x_centroid": 11.5 * h,
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"patch_ib(1)%y_centroid": 0 * h,
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"patch_ib(1)%length_x": 17 * h,
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"patch_ib(1)%length_y": 2 * h,
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"patch_ib(1)%slip": "T",
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# Fluids Physical Parameters
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"fluid_pp(1)%gamma": 1.0 / (gam_a - 1.0),
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"fluid_pp(1)%pi_inf": 0.0,
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"viscous": "T",
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"fluid_pp(1)%Re(1)": 1 / mu,
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},
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indent=4,
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)
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)

‎examples/2D_forward_facing_step/final.png‎

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‎src/simulation/m_cbc.fpp‎

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@:DEALLOCATE(vel_in, vel_out, pres_in, pres_out, Del_in, Del_out, alpha_rho_in, alpha_in)
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! Deallocating CBC Coefficients in x-direction
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if (any((/bc_x%beg, bc_x%end/) <= -5) .and. any((/bc_x%beg, bc_x%end/) >= -13)) then
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if (all((/bc_x%beg, bc_x%end/) <= -5) .and. all((/bc_x%beg, bc_x%end/) >= -13) .or. &
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bc_x%beg <= -5 .and. bc_x%beg >= -13 .or. &
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bc_x%end <= -5 .and. bc_x%end >= -13) then
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@:DEALLOCATE(fd_coef_x)
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if (weno_order > 1 .or. muscl_order > 1) then
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@:DEALLOCATE(pi_coef_x)
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end if
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end if
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! Deallocating CBC Coefficients in y-direction
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if (n > 0 .and. any((/bc_y%beg, bc_y%end/) <= -5) .and. &
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any((/bc_y%beg, bc_y%end/) >= -13 .and. bc_y%beg /= -14)) then
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@:DEALLOCATE(fd_coef_y)
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if (weno_order > 1 .or. muscl_order > 1) then
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@:DEALLOCATE(pi_coef_y)
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if (n > 0) then
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if (all((/bc_y%beg, bc_y%end/) <= -5) .and. all((/bc_y%beg, bc_y%end/) >= -13) .or. &
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bc_y%beg <= -5 .and. bc_y%beg >= -13 .or. &
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bc_y%end <= -5 .and. bc_y%end >= -13) then
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@:DEALLOCATE(fd_coef_y)
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if (weno_order > 1) then
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@:DEALLOCATE(pi_coef_y)
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end if
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end if
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end if
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! Deallocating CBC Coefficients in z-direction
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if (p > 0 .and. any((/bc_z%beg, bc_z%end/) <= -5) .and. any((/bc_z%beg, bc_z%end/) >= -13)) then
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@:DEALLOCATE(fd_coef_z)
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if (weno_order > 1 .or. muscl_order > 1) then
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@:DEALLOCATE(pi_coef_z)
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if (p > 0) then
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if (all((/bc_z%beg, bc_z%end/) <= -5) .and. all((/bc_z%beg, bc_z%end/) >= -13) .or. &
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bc_z%beg <= -5 .and. bc_z%beg >= -13 .or. &
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bc_z%end <= -5 .and. bc_z%end >= -13) then
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@:DEALLOCATE(fd_coef_z)
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if (weno_order > 1) then
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@:DEALLOCATE(pi_coef_z)
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end if
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end if
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end if
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