Search found 44 matches

by mingwang
February 26th, 2021, 9:56 am
Forum: Dispersion Model
Topic: Vertical Mass Distribution
Replies: 14
Views: 322

Re: Vertical Mass Distribution

Dear alicec, Thanks for your reply and help. 'The initialization will randomly distribute particles over that area.' If a source (Opt-5) is specified as 600 m2 and the emission rate (Opt-4) is specified as 100 particles/hour (1 particle = 1 mass unit) and the emission duration is 6 hours, HYSPLIT wi...
by mingwang
February 18th, 2021, 8:40 am
Forum: Dispersion Model
Topic: Vertical Mass Distribution
Replies: 14
Views: 322

Re: Vertical Mass Distribution

Dear alicec, Thank you very much for your reply. Your explanation is very helpful. It all makes sense to me now. I would like to confirm something about the multiple sources (emission area) with you. I notice that we are able to specify the size of the source with its emission rate. 3(1)- Enter star...
by mingwang
February 16th, 2021, 9:48 am
Forum: Dispersion Model
Topic: Vertical Mass Distribution
Replies: 14
Views: 322

Re: Vertical Mass Distribution

Dear alicec, Thanks for your reply. So the settings for the simulation attached in my previous post are correct? I am just wondering if NUMPAR is set to be 15,000,000 (1 particle is equivalent to 1 mass unit), but HYSPLIT actually released 9,289,945 particles. What did happen to the missing particle...
by mingwang
February 15th, 2021, 8:15 am
Forum: Dispersion Model
Topic: Vertical Mass Distribution
Replies: 14
Views: 322

Re: Vertical Mass Distribution

Dear alicec, Thank you very much for your help. I have reduced the number of particles released to 15,000,000 and run some simulations. The sum of each proportion at the different height levels is 100% now, which is good. But I have found another issue. After 6 hours of emission, the number of parti...
by mingwang
February 11th, 2021, 11:59 pm
Forum: Dispersion Model
Topic: Vertical Mass Distribution
Replies: 14
Views: 322

Re: Vertical Mass Distribution

Dear alicec, I have also just run with a smaller number of particles (288,000) and an emission rate of being 9600 on HPC for 6 replications (the same starting time). There was no such problem for all 6 replications, but the outputs and dispersal plumes were slightly different among the 6 replication...
by mingwang
February 11th, 2021, 7:39 am
Forum: Dispersion Model
Topic: Vertical Mass Distribution
Replies: 14
Views: 322

Re: Vertical Mass Distribution

Dear alicec, Thank you very much for your help. I ran with a smaller number of particles (288,000) and an emission rate of being 9600 on my computer (Windows). There was no such problem. I got 100.01%. Please see below and find the attached control and setup files. Index Height %Mass 10 2755.0 0.02 ...
by mingwang
February 9th, 2021, 6:12 pm
Forum: Dispersion Model
Topic: Vertical Mass Distribution
Replies: 14
Views: 322

Re: Vertical Mass Distribution

Dear alicec, Thank you very much for your help. I actually ran the simulation on HPC (HYSPLIT for LINUX), due to a large number of particles (28,800,000). It took almost 20 hours to finish. I have attached my CONTROL and SETUP.CFG file. Please find the attached files. Your help would be much appreci...
by mingwang
February 7th, 2021, 9:50 am
Forum: Dispersion Model
Topic: Vertical Mass Distribution
Replies: 14
Views: 322

Vertical Mass Distribution

Dear all, I used HYSPLIT (concentration dispersion component) to run a particle dispersal simulation for 25 hours. I then checked the vertical mass distribution in the message file. After the 24th hour of the simulation, the proportion of the mass at each height level to the total mass remained in t...
by mingwang
August 12th, 2019, 7:56 am
Forum: Dispersion Model
Topic: Deposition Velocity
Replies: 4
Views: 2190

Re: Deposition Velocity

Dear alicec,

Thank you very much for your reply. I really appreciate your help. It does make sense to me now. Thanks. :)


Kind Regards,

Ming
by mingwang
August 1st, 2019, 10:16 am
Forum: Dispersion Model
Topic: Diameter (µm) Density (g/cc) and Shape
Replies: 6
Views: 2689

Re: Diameter (µm) Density (g/cc) and Shape

Thank you very much for your help, alicec.

I am not clear about the sentence below. Could you please rephrase it? Your help would be much appreciated. Thanks.

'Met data output is valid for the point at which it is output.'