Run an exact solution simulation.

Parameters

[in,out] file Spec file.

The coagulation kernel and initial distribution must be matched for an exact solution to exist. The valid choices are:

Coagulation kernel	Initial aerosol distribution
Additive	Single exponential mode
Constant	Single exponential mode
Zero	Anything

See Input File Format: Spec File Format for the input file text format.

An exact (analytical) simulation spec file has the parameters:

run_type (string): must be exact
output_prefix (string): prefix of the output filenames — the filenames will be of the form PREFIX_SSSSSSSS.nc where SSSSSSSS is is the eight-digit output index (starting at 1 and incremented each time the state is output)
t_max (real, unit s): total simulation time
t_output (real, unit s): the interval on which to output data to disk and to print progress information to the screen (see Output File Format)
Input File Format: Diameter Axis Bin Grid
gas_data (string): name of file from which to read the gas material data — the file format should be Input File Format: Gas Material Data
aerosol_data (string): name of file from which to read the aerosol material data — the file format should be Input File Format: Aerosol Material Data
do_fractal (logical): whether to consider particles as fractal agglomerates. If do_fractal is no, then all the particles are treated as spherical. If do_fractal is yes, then the following parameters must also be provided:
- Input File Format: Fractal Data
aerosol_init (string): filename containing the initial aerosol state at the start of the simulation — the file format should be Input File Format: Aerosol Distribution
Input File Format: Scenario
Input File Format: Environment State
do_coagulation (logical): whether to perform particle coagulation. If do_coagulation is yes, then the following parameters must also be provided:
- Input File Format: Coagulation Kernel

Example:

 run_type exact                  # exact solution
 output_prefix additive_exact    # prefix of output files

 t_max 600                       # total simulation time (s)
 t_output 60                     # output interval (0 disables) (s)

 n_bin 160                       # number of bins
 d_min 1e-8                      # minimum diameter (m)
 d_max 1e-3                      # maximum diameter (m)

 gas_data gas_data.dat           # file containing gas data

 aerosol_data aero_data.dat      # file containing aerosol data
 do_fractal no                   # whether to do fractal treatment
 aerosol_init aero_init_dist.dat # aerosol initial condition file

 temp_profile temp.dat           # temperature profile file
 height_profile height.dat       # height profile file
 gas_emissions gas_emit.dat      # gas emissions file
 gas_background gas_back.dat     # background gas mixing ratios file
 aero_emissions aero_emit.dat    # aerosol emissions file
 aero_background aero_back.dat   # aerosol background file

 rel_humidity 0.999              # initial relative humidity (1)
 pressure 1e5                    # initial pressure (Pa)
 latitude 0                      # latitude (degrees, -90 to 90)
 longitude 0                     # longitude (degrees, -180 to 180)
 altitude 0                      # altitude (m)
 start_time 0                    # start time (s since 00:00 UTC)
 start_day 1                     # start day of year (UTC)

 do_coagulation yes              # whether to do coagulation (yes/no)
 kernel additive                 # Additive coagulation kernel