Revision as of 11:25, 28 January 2021 view source Pavlina Monhartova (talk \| contribs) Bureaucrats, Administrators 5,379 edits →My HPC model uses double precision due to unstable 1D channel. How can I make it stable in single precision? ← Older edit		Revision as of 16:12, 28 January 2021 view source Pavlina Monhartova (talk \| contribs) Bureaucrats, Administrators 5,379 edits →Why is my model using 2020 HPC slower than 2018 HPC? Newer edit →
Line 73: Not all HPC models will show an increase in run time when changing from the 2018 to the 2020 release - models that are controlled by the wave celerity or velocity control numbers and not the diffusion control number are likely to be similar in runtime. Some models will be even faster with the last 2020 release due to other improvements. However, especially where the cell size is smaller than the depth, the Wu approach is vastly superior to the Smagorinsky, and the more sophisticated Wu solution may start causing the diffusion control number (the third one displayed) to control the timestepping causing longer run times.<br> Despite the possible increase in runtime for some models, the Wu turbulence scheme is warranted particularly as cell sizes are typically getting smaller.<br> <br>

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