KelvinHelmholtz Instability Experiment

A method to perform a KelvinHelmholtz instability experiment is described.

Overview

This experiment is performed with the following 3 steps:

• Preparation of directory for experiments
• Preparation of initial condition
• Execution of experiments

Preparation of a directory for experiments

Let us move to the top directory of deepconv/arare5 src tree (assuming arare5-YYYYMMDD in the following example). Here, we perform an experiment in ../arare5-exp/catseye-exp directory. Please create the directory and enter there as follows:

$ mkdir -p ../deepconv-exp/catseye-exp
$ cd ../deepconv-exp/catseye-exp

Then, pleaase create the directories for executable files and configuration files as follows:

$ mkdir bin
$ mkdir conf

Finally, executable files and configuration files are copied as follows:

$ cp ../../arare5-YYYYMMDD/src/main/arare bin
$ cp ../../arare5-YYYYMMDD/src/main/arare_init-data bin
$ cp ../../arare5-YYYYMMDD/exp_setup_files/*catseye*.conf conf

Note that you can perform an experiment in any directory by using executable files and configuration (NAMELIST) files.

Create initial data file

Create initial data file "denscurrent-dry_restart.nc" using "bin/arare_init-data" and arare-catseye_init-data.conf.

$ ./bin/arare_init-data -N=conf/arare-catseye_init-data.conf

 *** MESSAGE [main] ***  Namelist file is 'arare-catseye_init-data.conf'
 *** MESSAGE [argset_init] ***  NAMELIST FILE = arare-catseye_init-data.conf
 *** MESSAGE [namelist_util] ***  ----- Initialization Messages -----
 *** MESSAGE [namelist_util] ***    MaxNmlArySize = 256
 *** MESSAGE [namelist_util] ***  -- version = $Name: arare5-20140306 $$Id: catseye.rd,v 1.1 2014-02-26 07:09:53 sugiyama Exp $
 *** MESSAGE [gridset_init] ***  xsub = 1
                       : 
 *** MESSAGE [main] ***  Making Initial data....
 *** MESSAGE [main] ***  Making Initial data (basic) named IsoThermal...
 *** MESSAGE [main] ***  Making Initial data (disturb) named tanh...
 *** MESSAGE [main] ***  Making Initial wind data (disturb) named tanh...
 *** MESSAGE [main] ***  Output variables into netCDF file...
 *** MESSAGE [restartfileioIO_init] ***  InputFile  =
 *** MESSAGE [restartfileioIO_init] ***  OutputFile = arare-catseys_init.nc

Run the experiment

Using an executable files 'arare' and a NAMELIST file arare-catseye.conf, execute 'arare' as follows. This program will be finished in few minutes - tens of minutes.

$ ./bin/arare -N=conf/arare-catseye.conf | tee catseye.log

 *** MESSAGE [main] ***  Namelist file is 'arare-catseye.conf'
 *** MESSAGE [argset_init] ***  NAMELIST FILE = arare-catseye.conf
 *** MESSAGE [namelist_util] ***  ----- Initialization Messages -----
 *** MESSAGE [namelist_util] ***    MaxNmlArySize = 256
 *** MESSAGE [namelist_util] ***  -- version = $Name: arare5-20140306 $$Id: catseye.rd,v 1.1 2014-02-26 07:09:53 sugiyama Exp $
 *** MESSAGE [timeset_init] ***  DelTimeLong  = 1.
                   :
 *** MESSAGE [HistoryClose] ***  "arare-catseye_Exner.nc" is closed
 *** MESSAGE [HistoryClose] ***  "arare-catseye_Km.nc" is closed

 ############## CPU TIME SUMMARY ################
 initialization         0.320010E-01
 time-integration       0.610998E+02  (1.02 minutes)
 ------------------------------------------------
        TOTAL TIME =    0.611318E+02  (1.02 minutes)

In this case, about 1 minites integration is performed. History data are output to 'VelX.nc' and 'PTemp.nc' etc., and a restart data is output to 'arare-catseye_restart.nc'.

Visualization

Please see First step analysis and visualization.

References

• Tsuboki and Sakakibara, CReSS User Manual (in Japanese)

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$Id: catseye.rd,v 1.1 2014-02-26 07:09:53 sugiyama Exp $