Thanks for your reply.Actually I increased ViscAh from 0.1 to 0.5 before sending my email.But it not solve the problem.And I have to consider calculating costs of the supercomputer, so I may not reduce the time step anymore.Also I think 10s is enough for a 500m resolution model.<br><br>Haoran<br><br><br><html>
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<td class="mail-subject" valign="top" style=" font-size: 13px; line-height: 1.25; color: #2c2c2e; word-break: break-all; ">[MITgcm-support] Re: Calculation overflow problem (Haoran Xu)</td>
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<div><div dir="auto">Did you try to decrease the time step or increse the horizontal viscosity?<br><br><br><br><br><div id="hw_signature">Sent from my phone</div></div><div style="line-height:1.5"><br><br>-------- Original message --------<br>From: <A data-auto-link="1" href="mailto:mitgcm-support-request@mitgcm.org">mitgcm-support-request@mitgcm.org</A><br>Date: Wed, Nov 1, 2023, 20:09<br>To: <A data-auto-link="1" href="mailto:mitgcm-support@mitgcm.org">mitgcm-support@mitgcm.org</A><br>Subject: MITgcm-support Digest, Vol 245, Issue 1<br><blockquote>Send MITgcm-support mailing list submissions to<br> <A data-auto-link="1" href="mailto:mitgcm-support@mitgcm.org">mitgcm-support@mitgcm.org</A><br><br>To subscribe or unsubscribe via the World Wide Web, visit<br> http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support<br>or, via email, send a message with subject or body 'help' to<br> <A data-auto-link="1" href="mailto:mitgcm-support-request@mitgcm.org">mitgcm-support-request@mitgcm.org</A><br><br>You can reach the person managing the list at<br> <A data-auto-link="1" href="mailto:mitgcm-support-owner@mitgcm.org">mitgcm-support-owner@mitgcm.org</A><br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of MITgcm-support digest..."<br><br><br>Today's Topics:<br><br> 1. Calculation overflow problem (Haoran Xu)<br><br><br>----------------------------------------------------------------------<br><br>Message: 1<br>Date: Wed, 1 Nov 2023 20:09:25 +0800 (CST)<br>From: "Haoran Xu" <<A data-auto-link="1" href="mailto:xu1jian2wei3@163.com">xu1jian2wei3@163.com</A>><br>To: MITgcm-support <<A data-auto-link="1" href="mailto:mitgcm-support@mitgcm.org">mitgcm-support@mitgcm.org</A>><br>Subject: [MITgcm-support] Calculation overflow problem<br>Message-ID: <<A data-auto-link="1" href="mailto:39711cf3.26d.18b8ac9d5aa.Coremail.xu1jian2wei3@163.com">39711cf3.26d.18b8ac9d5aa.Coremail.xu1jian2wei3@163.com</A>><br>Content-Type: text/plain; charset="gbk"<br><br>Dear MITgcm community,<br><br>I am running a model in Luzon strait with open boundary condition t,s,u,v. The model resolution is 500m.The calculation stopped due to overflow.I found the velocity increased in one area (image attached,velocity at level 78).I've tried smoothing the topography in this area(image attached),but it did not help much(overflow only delayed).I want to know if my configuration is properly(file attached).Or there is anything I can try to deal with this problem?<br><br><br>Any suggestions would be helpful. Thanks in advance.<br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20231101/1b5bfc30/attachment.html><br>-------------- next part --------------<br>A non-text attachment was scrubbed...<br>Name: velocity_at_78.png<br>Type: image/png<br>Size: 128134 bytes<br>Desc: not available<br>URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20231101/1b5bfc30/attachment.png><br>-------------- next part --------------<br>A non-text attachment was scrubbed...<br>Name: topo.png<br>Type: image/png<br>Size: 512439 bytes<br>Desc: not available<br>URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20231101/1b5bfc30/attachment-0001.png><br>-------------- next part --------------<br>A non-text attachment was scrubbed...<br>Name: smooth_topo.png<br>Type: image/png<br>Size: 480835 bytes<br>Desc: not available<br>URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20231101/1b5bfc30/attachment-0002.png><br>-------------- next part --------------<br>A non-text attachment was scrubbed...<br>Name: data<br>Type: application/octet-stream<br>Size: 3564 bytes<br>Desc: not available<br>URL: <http://mailman.mitgcm.org/pipermail/mitgcm-support/attachments/20231101/1b5bfc30/attachment.obj><br><br>------------------------------<br><br>Subject: Digest Footer<br><br>_______________________________________________<br>MITgcm-support mailing list<br><A data-auto-link="1" href="mailto:MITgcm-support@mitgcm.org">MITgcm-support@mitgcm.org</A><br>http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support<br><br><br>------------------------------<br><br>End of MITgcm-support Digest, Vol 245, Issue 1<br>**********************************************<br><br></blockquote></div></div>
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