Embedded Files
Experiment 1: Default Vertical Grid
Experiment 1: Default Vertical Grid
Q: How does the topography affect flow field? Does a tall mountain lead to a quasi-2D result?Â
Q: How does the topography affect flow field? Does a tall mountain lead to a quasi-2D result?Â
A: Topography plays a big role! A short "bump" leads to complicated 3D interactions while the tall mountain is akin to an infinite cylinder.
A: Topography plays a big role! A short "bump" leads to complicated 3D interactions while the tall mountain is akin to an infinite cylinder.
Top-down view of vorticity field (evolution over time)
Top-down view of vorticity field (evolution over time)
Both control and tall mountain conditions are "quasi-2D" and shed vortices as expected. The small mountain has 3D effects which cancel out the vortices.Â
Both control and tall mountain conditions are "quasi-2D" and shed vortices as expected. The small mountain has 3D effects which cancel out the vortices.Â
a) Control Mountain
a) Control Mountain
b) Tall Mountain
b) Tall Mountain
c) Short Mountain
c) Short Mountain
Constant-lat view of zonal velocity anomaly (end of simulation)
Constant-lat view of zonal velocity anomaly (end of simulation)
a) Control Mountain
a) Control Mountain
b) Tall Mountain
b) Tall Mountain
c) Short Mountain
c) Short Mountain
Experiment 2: Custom Vertical Grid
Experiment 2: Custom Vertical Grid
Q: How does a modified vertical grid affect vortex shedding?
Q: How does a modified vertical grid affect vortex shedding?
A: We don't know! Because the custom grid caused the solution to blow up (:
A: We don't know! Because the custom grid caused the solution to blow up (:
a) Vertical grid spacing w/ concentration at ~1500m
a) Vertical grid spacing w/ concentration at ~1500m
b) Vertical grid spacing w/ concentration at ~6000m
b) Vertical grid spacing w/ concentration at ~6000m
c) Vertical grid spacing w/ concentration at ~300m
c) Vertical grid spacing w/ concentration at ~300m
Second time step at 1000 hPa
Second time step at 1000 hPa
Final time step at 1000 hPa
Final time step at 1000 hPa
Notes
Notes
IC path: /project/amp02/dcmip2025/CAM_6_4_082_21052025/src/dynamics/tests/initial_conditions/ic_horiz_mount_flows.F90
Path to vertical grid container directory: /project/dcmip/grios/
Grids:
/home/cwomack/grids/template_L38_391m_wide.nc
/home/cwomack/grids/template_L38_1659m_wide.nc
/home/cwomack/grids/template_L38_6346m_wide.nc
Path to experiment output: /project/dcmip/cwomack/
List of Experiments:
vortex_se_ne30_ctrl.cam.h0i.0001-01-01-00000.nc
vortex_se_ne30_4xh.cam.h0i.0001-01-01-00000.nc
vortex_se_ne30_04xh.cam.h0i.0001-01-01-00000.nc
vortex_se_ne30_4x_6050m.cam.h0i.0001-01-01-00000.nc
vortex_se_ne30_ctrl_1416m.cam.h0i.0001-01-01-00000.nc
How to change the vertical grid
Find the grid of your choosing at grid directory, {GRID_DIR} = /project/dcmip/grios/
Copy the path to the netCDF file in {GRID_DIR}. This will be your {GRID_PATH}.
Go to your case directory, {CASE_DIR}
vim into user_nl_cam
Change the path assigned to NCDATA to {GRID_PATH}
Make sure you re-build
Parameter study
Mountain heights (h0)
375 m (experiment, short mountain - 3D)
1500 m (control)
6000 m (experiment, tall mountain - pseudo 2D)
Vertical layer analytic expression
focus on 1500 m concentration
focus on 6000 m concentration
Visualizations
Vertical grid in pressure and height coordinates
Cross-section of mountain (x-z section)
Cross-section of mountain in all three cases at a consistent time step (or video); looking for the presence of vertical vortices (hopefully we see these in the low mountain case)
This should visualize the 3D transition
Top-down of the mountain in all three cases at a consistent time step (or video); looking for the presence of vortex streets (should see these in both the control and high mountain case)
Interested to see the differences between the "infinite mountain" case vs the control
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