Search found 7 matches

by Peter_Wilson
Wed Apr 07, 2021 1:28 pm
Forum: Meteorological Input Data
Topic: boudary conditions for real case LES || WRF-LES specialists help please.
Replies: 5
Views: 529

Re: lateral boudary conditions for real case LES

Not sure if the problem is with the nesting itself. Nesting cannot improve the resolution of the initial boundary conditions of the coarsest region. I think that the situation can be changed either by forcing the structures of large eddies, or by increasing the resolution of the boundary conditions ...
by Peter_Wilson
Tue Apr 06, 2021 12:02 am
Forum: WRF Physics
Topic: WRF-LES(Real data) microphysics doesn't work
Replies: 4
Views: 335

Re: WRF-LES(Real data) microphysics doesn't work

I did a one-way nested run with d01 3km grid and d02 166m (1:18 grid ratio) using HRRR boundary conditions for a coarsest domain. And this is complete nonsense, the model does not resolve any large eddies, there is no eddy resolving deep convection. Also the physical structure of cloud,rain,snow,ice...
by Peter_Wilson
Mon Apr 05, 2021 11:45 pm
Forum: Meteorological Input Data
Topic: boudary conditions for real case LES || WRF-LES specialists help please.
Replies: 5
Views: 529

Re: lateral boudary conditions for real case LES

Yep, i did a one-way nested run with d01 3km grid and d02 166m (1:18 grid ratio) using HRRR boundary conditions for a coarsest domain. And this is complete nonsense, the model does not resolve any large eddies, there is no eddy resolving deep convection. Also the physical structure of cloud,rain,sno...
by Peter_Wilson
Sat Apr 03, 2021 7:43 pm
Forum: Meteorological Input Data
Topic: boudary conditions for real case LES || WRF-LES specialists help please.
Replies: 5
Views: 529

boudary conditions for real case LES || WRF-LES specialists help please.

Hi everyone, I want to run WRF LES(Large eddy simulation) in a real case with real lateral boundary conditions. Which weather model is best for simulating with a 100–150 m grid spacing? I tried GFS(28km) and ECMWF(9km) but they do not resolve turbulent scales at this grid spacing, obviously they're ...
by Peter_Wilson
Tue Mar 30, 2021 3:57 pm
Forum: WRF Physics
Topic: WRF-LES(Real data) microphysics doesn't work
Replies: 4
Views: 335

Re: WRF-LES(Real data) microphysics doesn't work

Sorry, but I have limited memory and computational resources and this prevents me from simulating with a huge number of grid cells. I also want the simulated domain to be isotropic so that dx = dy = dz. The maximum top of the model I can get is 100 hpa to keep my dz = 100 m and still keep a reasonab...
by Peter_Wilson
Fri Mar 26, 2021 6:46 pm
Forum: WRF Physics
Topic: WRF-LES(Real data) microphysics doesn't work
Replies: 1
Views: 141

WRF-LES(Real data) microphysics doesn't work

Hi, i'm running WRF in LES mode with real data, using NCEP GDAS Final Analysis data. The problem is that fields Qcloud, qrain, qgraup, qice, qrain, qsnow and their two-dimensional counterparts in the output file all are equal to 0 and constant. To me, these fields begin to appear in the output file ...
by Peter_Wilson
Sat Mar 20, 2021 4:24 pm
Forum: WRF Physics
Topic: WRF-LES(Real data) microphysics doesn't work
Replies: 4
Views: 335

WRF-LES(Real data) microphysics doesn't work

Hi, i'm running WRF in LES mode with real data, using NCEP GDAS Final Analysis data. The problem is that fields Qcloud, qrain, qgraup, qice, qrain, qsnow and their two-dimensional counterparts in the output file all are equal to 0 and constant. To me, these fields begin to appear in the output file ...

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