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<!--StartFragment--><p class="ydpf50a17f3yiv4253934605ydpbc1d0b25MsoNormal" style="color: rgb(38, 40, 42);">Hello everyone</p><p class="ydpf50a17f3yiv4253934605ydpbc1d0b25MsoNormal" style="color: rgb(38, 40, 42);">I'm running a modell with grid points 510*450*32 for 1 year. I've chosen DeltaT=60, but the runtime is too long.</p><p class="ydpf50a17f3yiv4253934605ydpbc1d0b25MsoNormal" style="color: rgb(38, 40, 42);">I selected a experimental test with grid points 10*12*2 and DeltaT=60 and I run for 1 year and lasted 11 minutes, but with DeltaT=108000 it took a second to run. The same test with DeltaT=108000 for 5 years lasted 21 minutes and with DeltaT=5*108000=540000 lasted a second.</p><p class="ydpf50a17f3yiv4253934605ydpbc1d0b25MsoNormal" style="color: rgb(38, 40, 42);">How can I reduce the runtime of the model by modifying DeltaT? Is it possible to change DeltaT unstable the model after some time?</p><p class="ydpf50a17f3yiv4253934605ydpbc1d0b25MsoNormal" style="color: rgb(38, 40, 42);">Thanks for your guidance</p><!--EndFragment--></div></div></body></html>