Hi,I would like to inquire about WRF-LES

[Kongs]

Hello everyone! I recently want to try creating a WRF-LES for a region, with a simulation time of one year. I would like to ask everyone, is it possible to simulate a WRF-LES with a one-year cycle, and what is the appropriate output time for the LES region? Is it every minute or less than half an hour or something else? What other suggestions are there?
I hope to receive your reply, thank you very much!

 

[Ming Chen]

I suppose you plan too do real-time LES simulation, please let me know if I am wrong.
LES simulation requires high resolution and small time step, and thus it could be very expensive for 1-year simulation.
The output time intervals depend on your research objectives, and there is no rule when/how frequent the output should be,

 

[Kongs]

Thank you for your reply. I also think that running WRF-LES for one year takes up too much memory. I have seen that the LES region in existing literature is output in minutes. So, if I run WRF-LES for one year, does the LES region output time interval too large to show the advantages of LES?

 

[Kongs]

I suppose you plan too do real-time LES simulation, please let me know if I am wrong.
LES simulation requires high resolution and small time step, and thus it could be very expensive for 1-year simulation.
The output time intervals depend on your research objectives, and there is no rule when/how frequent the output should be,

Thank you for your reply. I also think that running WRF-LES for one year takes up too much memory. I have seen that the LES region in existing literature is output in minutes. So, if I run WRF-LES for one year, does the LES region output time interval too large to show the advantages of LES?

 

[Kongs]

I suppose you plan too do real-time LES simulation, please let me know if I am wrong.
LES simulation requires high resolution and small time step, and thus it could be very expensive for 1-year simulation.
The output time intervals depend on your research objectives, and there is no rule when/how frequent the output should be,

Yes, dear Mr. Chen, I plan to do a real case study.

 

[ArminH]

Hi everyone,

I am also trying to do a real-time WRF-LES for one year. Regarding the model setup like the physics schemes and the spatial/temporal resolutions and so on, I would suggest you read the paper entitled "A one-year long turbulence simulation using a WRF-LES based modeling system at Østerild". For instance, they produced the output of the innermost LES domain every 12 seconds, using which they obtained a very good agreement with the measurement data.

My main problem with conducting such a simulation is the cell perturbation method, which needs to be applied at the boundaries of the LES domains to spur turbulence. As far as I understood, this part of the code does not exist in the WRF model, and different institutes have implemented their own piece of code mainly based on the method proposed by Muñoz-Esparza et al. (2014, 15), but only for an idealized case simulation. I am wondering how I can find this piece of code and how I have to modify it for a real-case simulation. Any suggestions?

 

[Kongs]

Hi everyone,

I am also trying to do a real-time WRF-LES for one year. Regarding the model setup like the physics schemes and the spatial/temporal resolutions and so on, I would suggest you read the paper entitled "A one-year long turbulence simulation using a WRF-LES based modeling system at Østerild". For instance, they produced the output of the innermost LES domain every 12 seconds, using which they obtained a very good agreement with the measurement data.

My main problem with conducting such a simulation is the cell perturbation method, which needs to be applied at the boundaries of the LES domains to spur turbulence. As far as I understood, this part of the code does not exist in the WRF model, and different institutes have implemented their own piece of code mainly based on the method proposed by Muñoz-Esparza et al. (2014, 15), but only for an idealized case simulation. I am wondering how I can find this piece of code and how I have to modify it for a real-case simulation. Any suggestions?

Hello, I have just come into contact with WRF-LES and am still trying to run it. I apologize for not being able to answer your question, but thank you very much for your reply and this article.