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Running fine-resolution LES runs from Coarse solution

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Is there a way to run fine-resolution idealized runs using the existing coarse run solution? Something similar to ndown. I would like to study grid dependence on the solution for simulating a convective boundary layer. My domain size would be fixed, with the number of grid cells increasing according to the grid size. I ran a coarse solution and got the statistics. I would like to know if I can use the spin-up solution from the coarse grid simulation for my future runs.

Hi Sudheer,

Unfortunately, the ndown program will not work for the idealized cases. It was written for specific applications, and those must be real-data case runs. You could, however, keep your current output, and then run another nested case to compare the differences. If you don't want to use 2-way nesting, you can simply turn feedback off (feedback = 0) in the namelist and then it will be a 1-way nest, which is similar to ndown.

Hi Kelly,

Thank you for your reply.

I have used nested domains in my earlier LES studies. However, the overall domain size would be different for the parent and the nested domains. This time I thought of keeping the domain sizes same and just refine the grid.

Looks like I'll have to start with a much bigger parent domain and have nests inside it.

Thank you