Changes between Version 160 and Version 161 of doc/app/particle_parameters
- Timestamp:
- Jun 12, 2017 11:52:55 AM (8 years ago)
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doc/app/particle_parameters
v160 v161 784 784 }}} 785 785 {{{#!td 786 This parameter is used for [#splitting_mode splitting_mode] = 'const'. It defines the number into how many partiles one particle is divided. This means that, if all other splitting criterion's for one super droplet are fulfilled, splitting_factor-1 new particles (with the same properties as the origin super droplet) are created. The weighting factor of each of the super droplets is divided by the splitting_factor. For [#splitting_mode splitting_mode] = 'cl_av' and 'gb_av' this parameter is calculated automatically and given by the ratio of the actual weighting factor of a super droplet and the approximated number concentration for cloud droplets with a similar radius in a certain volume (grid volume).786 This parameter is used for [#splitting_mode splitting_mode] = 'const'. It defines the number into how many partiles one particle is divided. This means that, if all other splitting criterion's for one super droplet are fulfilled, [#splitting_factor splitting_factor]-1 new particles (with the same properties as the origin super droplet) are created. The weighting factor of each of the super droplets is divided by the [#splitting_factor splitting_factor]. For [#splitting_mode splitting_mode] = 'cl_av' and 'gb_av' this parameter is calculated automatically and given by the ratio of the actual weighting factor of a super droplet and the approximated number concentration for cloud droplets with a similar radius in a grid volum). 787 787 }}} 788 788 |---------------- … … 841 841 842 842 '' 'cl_av' '' 843 In splitting mode 'cl_av' a critical radius [#radius_split radius_split] and a splitting function must be prescribed. The critical weighting factor is calculated while approximating a 'gamma', 'log' or 'exp'- drop size distribution. In this mode a drop size distribution (discretized in 100 bins in a range from 1.0 µm to 1 mm) is calculated as an average over all cloudy grid boxes. Super droplets which have a larger radius and larger weighting factor are split into 'splitting_factor' super droplets. In this case the [#splitting_factor splitting_factor] is calculated of weighting factor of the super droplet and the approximated number concentration for droplet of such a size. Due to the splitting, the weighting factor of the super droplet and all created clones is reduced by the factor of 'splitting_facor'.843 In splitting mode 'cl_av' a critical radius [#radius_split radius_split] and a splitting function must be prescribed. The critical weighting factor is calculated while approximating a 'gamma', 'log' or 'exp'- drop size distribution. In this mode a drop size distribution (discretized in 100 bins in a range from 1.0 µm to 1 mm) is calculated as an average over all cloudy grid boxes. Super droplets which have a larger radius and larger weighting factor are split into [#splitting_factor splitting_factor] super droplets. In this case the [#splitting_factor splitting_factor] is calculated of weighting factor of the super droplet and the approximated number concentration for droplet of such a size. Due to the splitting, the weighting factor of the super droplet and all created clones is reduced by the factor of [#splitting_factor splitting_factor]. 844 844 845 845 '' 'gb_av' ''