http://lmdz-forge.lmd.jussieu.fr/mediawiki/Planets/api.php?action=feedcontributions&feedformat=atom&user=StreelPlanets - User contributions [en]2026-06-11T20:01:57ZUser contributionsMediaWiki 1.27.7http://lmdz-forge.lmd.jussieu.fr/mediawiki/Planets/index.php?title=Venus_PCM_-_Microphysical_scheme&diff=3168Venus PCM - Microphysical scheme2026-01-08T01:53:08Z<p>Streel: Add categories</p>
<hr />
<div><pre style="color: red"> ! This is a work in progress to describe the microphysical scheme used in the Venus PCM ! </pre><br />
<br />
<br />
== How to activate the microphysical scheme ==<br />
<br />
<br />
=== In the '''physiq.def''' file ===<br />
<br />
<br />
In the physiq.def file, you need to modify the flag :<br />
<br />
'''cl_scheme''' = 1 to '''cl_scheme''' = 2<br />
<br />
A new set of flags are now useful to you :<br />
<br />
'''debug_cloud''' = n -> get you a full set of information on what is happening in the microphysical scheme. <font color="red"> ! Be careful it is intended for 1D for now, you can expect a lot of data in 3D (to be improved) ! </font><br />
<br />
<br />
A set of flags to activate or not the individual processes of the microphysical scheme<br />
<br />
'''mode_merging''' = y<br />
<br />
'''hom_nuclea''' = y<br />
<br />
'''het_nuclea''' = y<br />
<br />
'''cond_evap''' =y<br />
<br />
'''coag''' = y<br />
<br />
<br />
You are able to modify the standard deviation of the size distribution of the mode 1 and mode 2 droplets<br />
<br />
'''sigma_mode1''' = 1.56<br />
<br />
'''sigma_mode2''' = 1.29<br />
<br />
<br />
Finally you have a set of flags and free parameters to change of the aerosols production (which serves as possible condensation nuclei for the droplets)<br />
<br />
First concerning the properties of the aerosols<br />
<br />
'''prod_aer''' = y If you want to include the aerosols or not<br />
<br />
'''rad_aer''' = 0.125e-6 (m) The mean radius of the aerosols produced<br />
<br />
'''sigma_aer''' = 1.56 The standard deviation of the size distribution of the aerosols<br />
<br />
'''rho_aer''' = 1800 (kg/m3) The density of the aerosols<br />
<br />
And then concerning the spatial distribution of the aerosols production. We're making the assumption that the vertical production follows a gaussian shape.<br />
<br />
'''alt_aer''' = 62000 (m) Altitude of the peak of production of the aerosols<br />
<br />
'''sigmaz_aer''' = 2000 (m) Vertical standard deviation of the gaussian distribution<br />
<br />
'''tx_prod_aer''' = 2.D-10 (/m2/s) Vertically integrated production rate of the aerosols<br />
<br />
----<br />
<br />
=== In the '''traceurs.def''' file ===<br />
<br />
You need to add a set of new traceurs <font color="red">! You need to add it at the end of the traceurs list (Until the rework of the traceurs in the Venus PCM) !</font><br />
<br />
<pre> <br />
10 10 m0_aer<br />
10 10 m3_aer<br />
10 10 m0_mode1drop<br />
10 10 m0_mode1ccn<br />
10 10 m3_mode1sa<br />
10 10 m3_mode1wv<br />
10 10 m3_mode1ccn<br />
10 10 m0_mode2drop<br />
10 10 m0_mode2ccn<br />
10 10 m3_mode2sa<br />
10 10 m3_mode2wv<br />
10 10 m3_mode2ccn <br />
</pre><br />
<br />
<br />
[[Category:Venus-Model]]<br />
[[Category:Venus-LMDZ]]</div>Streelhttp://lmdz-forge.lmd.jussieu.fr/mediawiki/Planets/index.php?title=Venus_PCM_-_Microphysical_scheme&diff=3167Venus PCM - Microphysical scheme2026-01-08T01:46:51Z<p>Streel: First iteration of the microphysical page for Venus PCM</p>
<hr />
<div><pre style="color: red"> ! This is a work in progress to describe the microphysical scheme used in the Venus PCM ! </pre><br />
<br />
<br />
== How to activate the microphysical scheme ==<br />
<br />
<br />
=== In the '''physiq.def''' file ===<br />
<br />
<br />
In the physiq.def file, you need to modify the flag :<br />
<br />
'''cl_scheme''' = 1 to '''cl_scheme''' = 2<br />
<br />
A new set of flags are now useful to you :<br />
<br />
'''debug_cloud''' = n -> get you a full set of information on what is happening in the microphysical scheme. <font color="red"> ! Be careful it is intended for 1D for now, you can expect a lot of data in 3D (to be improved) ! </font><br />
<br />
<br />
A set of flags to activate or not the individual processes of the microphysical scheme<br />
<br />
'''mode_merging''' = y<br />
<br />
'''hom_nuclea''' = y<br />
<br />
'''het_nuclea''' = y<br />
<br />
'''cond_evap''' =y<br />
<br />
'''coag''' = y<br />
<br />
<br />
You are able to modify the standard deviation of the size distribution of the mode 1 and mode 2 droplets<br />
<br />
'''sigma_mode1''' = 1.56<br />
<br />
'''sigma_mode2''' = 1.29<br />
<br />
<br />
Finally you have a set of flags and free parameters to change of the aerosols production (which serves as possible condensation nuclei for the droplets)<br />
<br />
First concerning the properties of the aerosols<br />
<br />
'''prod_aer''' = y If you want to include the aerosols or not<br />
<br />
'''rad_aer''' = 0.125e-6 (m) The mean radius of the aerosols produced<br />
<br />
'''sigma_aer''' = 1.56 The standard deviation of the size distribution of the aerosols<br />
<br />
'''rho_aer''' = 1800 (kg/m3) The density of the aerosols<br />
<br />
And then concerning the spatial distribution of the aerosols production. We're making the assumption that the vertical production follows a gaussian shape.<br />
<br />
'''alt_aer''' = 62000 (m) Altitude of the peak of production of the aerosols<br />
<br />
'''sigmaz_aer''' = 2000 (m) Vertical standard deviation of the gaussian distribution<br />
<br />
'''tx_prod_aer''' = 2.D-10 (/m2/s) Vertically integrated production rate of the aerosols<br />
<br />
----<br />
<br />
=== In the '''traceurs.def''' file ===<br />
<br />
You need to add a set of new traceurs <font color="red">! You need to add it at the end of the traceurs list (Until the rework of the traceurs in the Venus PCM) !</font><br />
<br />
<pre> <br />
10 10 m0_aer<br />
10 10 m3_aer<br />
10 10 m0_mode1drop<br />
10 10 m0_mode1ccn<br />
10 10 m3_mode1sa<br />
10 10 m3_mode1wv<br />
10 10 m3_mode1ccn<br />
10 10 m0_mode2drop<br />
10 10 m0_mode2ccn<br />
10 10 m3_mode2sa<br />
10 10 m3_mode2wv<br />
10 10 m3_mode2ccn <br />
</pre></div>Streel