<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><div class="gmail_default">Hi Martin </div>
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<div class="gmail_default">Here, I've included the depths and model results where I'm experiencing high velocities. As you mentioned, I've checked the volume flux that has already been observed, but not at the open boundary; instead, I've checked the estuary, where I experience higher velocities for an entire tidal cycle, with the volume flux remaining constant during the ebb and flood phases. Since the velocities are caused by topography and geometric factors, adjusting the tidal height and velocity in this area is more difficult, yet it is still tried. I lowered the input velocities by the time tidal height are matched with observation in order to correct amplitudes, however the velocities are too much. <br></div>
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<div class="gmail_default">Kind regards</div>
<div class="gmail_default">K Rajesh</div></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><img src="cid:ii_lwitvgsz1" alt="Screenshot from 2024-05-23 11-13-55.png" width="562" height="422"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 15, 2024 at 7:51 PM Killampalli Rajesh <<a href="mailto:rajesh70530@gmail.com" target="_blank">rajesh70530@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">Dear Martin </div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">Thank you for your response. I repent for having missed it. My model domain is the Coringa Estuary on India's east coast. where several creeks/channels meet to the estuary is my model area. I'm making a high-resolution tide model with a horizontal resolution of 100m for this domain. Include name list and model code files. Please see links 1 and 2. In link 2 I followed the method to preprocess the baroclinic tidal current where Data from TPXO7.2 was utilized to produce boundary conditions (OBEam, OBEph) amplitude and phase. <br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><span style="font-family:Arial,Helvetica,sans-serif"><a href="http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/tides/?diff_format=s&sortby=log&pathrev=HEAD" target="_blank">http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/tides/?diff_format=s&sortby=log&pathrev=HEAD</a></span></div><div class="gmail_default" style="font-family:verdana,sans-serif"><a href="https://github.com/RajeshKillampalli/MITgcm_tidesetup_02/tree/main" target="_blank">https://github.com/RajeshKillampalli/MITgcm_tidesetup_02/tree/main</a><br></div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, May 14, 2024 at 7:02 PM Killampalli Rajesh <<a href="mailto:rajesh70530@gmail.com" target="_blank">rajesh70530@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">Dear MITgcm community<div><br><div style="font-family:verdana,sans-serif"><span style="font-family:Arial,Helvetica,sans-serif">I have added additional points to the earlier post "Extreme tidal currents in the simulation at narrow channels".Model mesh resolution is 100 metres. I'm attempting to resolve this issue by adjusting the bottomdragliner coefficient, which was previously set to 0.002. When it increases to 0.006, the model blows up and writes NaNs. For 0.005, the model may run, but the velocities are not reduced as expected, and less variance is recognised. Currently, the maximum channel flow was 1.25m/s; after modifying to 0.005, it was 1.21m/s redused. and I experimented with ViscAh from 10 to 100, but no substantial difference was seen. Can someone advise how to solve this?</span> <br></div><div style="font-family:verdana,sans-serif"><br></div></div><div style="font-family:verdana,sans-serif">Best Regards<font color="#888888"><br>Killampalli Rajesh</font><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 8, 2024 at 6:56 PM Killampalli Rajesh <<a href="mailto:rajesh70530@gmail.com" target="_blank">rajesh70530@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div style="font-family:verdana,sans-serif">Dear MITgcm community <br></div><div style="font-family:verdana,sans-serif"><br></div><div style="font-family:verdana,sans-serif">Thank you for your assistance; I'm modelling tidal circulation in the lagoon, which is connected to the coastal seas.The research region includes lagoon and coastal waterways. The boundary conditions include baroclinic tidal currents at open boundaries in data.obcs, OBEam, and OBEph only on the eastern border, and OBCS_Tides specified in the model. The model results is verified using tidal heights with the tide gauge data, however the tidal currents are exaggerated. In example, the model findings suggest extremely strong tidal currents at the mouth/channel, which contradicts reality.</div><div style="font-family:verdana,sans-serif"><br>Best Regards<br>Killampalli Rajesh<br></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><br></div></div></div></div></div>
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