[Wrf-users] Upper boundary cfl error

Andre Pattantyus apattantyus2008 at my.fit.edu
Wed Mar 3 17:10:40 MST 2010


Hi all,

I am getting these few errors at my upper boundary.  Among other things, I
have tried using the new damping option, diff_opt =2, because I am using
running towards an LES in my inner domain. A solution seems easy but so far
my attempts have not yielded success. below is my namelist.


3  points exceeded cfl=2 in domain d03 at time 2006-03-29_12:00:16 hours
  MAX AT i,j,k:  40 80 4  vert_cfl,w,d(eta)= 2.263442993 -80.54151917
0.2999961376E-02
  3  points exceeded cfl=2 in domain d03 at time 2006-03-29_12:00:16 hours
  MAX AT i,j,k:  40 80 4  vert_cfl,w,d(eta)= 2.485260963 13.09560013
0.2999961376E-02
  3  points exceeded cfl=2 in domain d03 at time 2006-03-29_12:00:16 hours
  MAX AT i,j,k:  41 80 4  vert_cfl,w,d(eta)= 2.567909241 -117.0119095
0.2999961376E-02
  22  points exceeded cfl=2 in domain d03 at time 2006-03-29_12:00:16+08/09
hours
  MAX AT i,j,k:  40 80 4  vert_cfl,w,d(eta)= 6.311451435 -170.4623871
0.2999961376E-02
  36  points exceeded cfl=2 in domain d03 at time 2006-03-29_12:00:16+08/09
hours
  MAX AT i,j,k:  40 80 3  vert_cfl,w,d(eta)= 6.109247208 -223.6106720
0.2799987793E-02
      AVOST IN VILKA
~
~
~

 &time_control
 run_days                            = 2,
 run_hours                           = 36,
 run_minutes                         = 0,
 run_seconds                         = 0,
 start_year                          = 2006, 2006, 2006,
 start_month                         = 03,   03,   03,
 start_day                           = 29,   29,   29,
 start_hour                          = 12,   12,   12,
 start_minute                        = 00,   00,   00,
 start_second                        = 00,   00,   00,
 end_year                            = 2006, 2006, 2006,
 end_month                           = 03,   03,   03,
 end_day                             = 31,   31,   31,
 end_hour                            = 00,   00,   00,
 end_minute                          = 00,   00,   00,
 end_second                          = 00,   00,   00,
 interval_seconds                    = 10800
 input_from_file                     = .true.,.true.,.true.,
 history_interval                    =  60,  60,   60,
 frames_per_outfile                  = 1000, 1000, 1000,
 restart                             = .false.,
 restart_interval                    = 720,
 io_form_history                     = 2
 io_form_restart                     = 2
 io_form_input                       = 2
 io_form_boundary                    = 2
 debug_level                         = 0
 /

 &domains
 time_step                           = 8,
 time_step_fract_num                 = 0,
 time_step_fract_den                 = 1,
 max_dom                             = 3,
 e_we                                = 121,   169,  241,
 e_sn                                = 121,   169,  241,
 e_vert                              = 61,    61,   61,
 p_top_requested                     = 5000,
 num_metgrid_levels                  = 40,
 num_metgrid_soil_levels             = 4,
 dx                                  = 4500, 1500, 500,
 dy                                  = 4500, 1500, 500,
 grid_id                             = 1,     2,     3,
 parent_id                           = 0,     1,     2,
 i_parent_start                      = 1,    33,    53,
 j_parent_start                      = 1,    33,    53,
 parent_grid_ratio                   = 1,     3,     3,
 parent_time_step_ratio              = 1,     3,     3,
 feedback                            = 0,
 smooth_option                       = 0,
 eta_levels                          =  1.0000, .9976, .9948, .9920, .9890,
.9858, .9825, .9790, .9754, .9718, .9679, .9637, .9590, .9538, .9480,
.9415, .9340, .9251, .9144, .9020, .8883, .8736, .8582, .8420, .8253,
.8079, .7900, .7714, .7523, .7326, .7124, .6915, .6699, .6477, .6248,
.6015, .5779, .5540, .5300, .5057, .4812, .4566, .4319, .4070, .3822,
.3576, .3333, .3100, .2881, .2679, .2494, .2316, .2135, .1936, .1707,
.1445, .1159, .0863, .0569, .0282, .0000,
 /


 &physics
 mp_physics                          = 8,     8,     8,
 ra_lw_physics                       = 1,     1,     1,
 ra_sw_physics                       = 2,     2,     2,
 radt                                = 4,     4,     4,
 sf_sfclay_physics                   = 4,     4,     4,
 sf_surface_physics                  = 3,     3,     3,
 bl_pbl_physics                      = 4,     4,     4,
 bldt                                = 0,     0,     0,
 cu_physics                          = 0,     0,     0,
 cudt                                = 0,     0,     0,
 isfflx                              = 1,
 ifsnow                              = 0,
 icloud                              = 1,
 surface_input_source                = 1,
 num_soil_layers                     = 6,
 sf_urban_physics                    = 0,
 maxiens                             = 1,
 maxens                              = 3,
 maxens2                             = 3,
 maxens3                             = 16,
 ensdim                              = 144,
 slope_rad                           = 1,     1,     1,
 topo_shading                        = 1,     1,     1,
 shadlen                             = 25000.,
 /

 &fdda
 /

 &dynamics
 w_damping                           = 1,
 diff_opt                            = 2,
 km_opt                              = 4,
 diff_6th_opt                        = 2,      2,      2,
 diff_6th_factor                     = 0.12,   0.12,   0.12,
 base_temp                           = 290.
 damp_opt                            = 3,
 zdamp                               = 5000.,  5000.,  5000.,
 dampcoef                            = 0.2,    0.2,    0.2
 khdif                               = 0,      0,      0,
 kvdif                               = 0,      0,      0,
 non_hydrostatic                     = .true., .true., .true.,
 moist_adv_opt                       = 1,      1,      1,
 scalar_adv_opt                      = 1,      1,      1,
 /

 &bdy_control
 spec_bdy_width                      = 5,
 spec_zone                           = 1,
 relax_zone                          = 4,
 specified                           = .true., .false.,.false.,
 nested                              = .false., .true., .true.,
 /

 &grib2
 /

 &namelist_quilt
 nio_tasks_per_group = 0,
 nio_groups = 1,



-- 
Andre Pattantyus, Graduate Student Research Assistant
Marine and Environmental Systems, Florida Institute of Technology
150 W. University Blvd, Melbourne, FL 32901

Phone: (321) 674-8330 | Fax: (321) 674-7212 | Email: apattantyus2008 at fit.edu
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