[Nek5000-users] Nek5000-users Digest, Vol 100, Issue 29

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Dear Jiang,


If you run with lx1=10 you have 1000 points per element.


FEM never runs with 10th order - the SEM is meant to do this.


What is the largest SEM problem you have run so far?  I recommend starting with a sequence of small ones just to get used to the workflow.


Paul


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From: nek5000-users-bounces at lists.mcs.anl.gov <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
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Subject: Re: [Nek5000-users] Nek5000-users Digest, Vol 100, Issue 29

Hi Paul,

Now the number of total elements is 576000 written in the rea file. By the way, would you please tell me the reason why only 1/1000 number of elements are needed indeed with SEM.

Kind regards,

Jian

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Date: Mon, 26 Jun 2017 15:27:28 +0000
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Subject: Re: [Nek5000-users] genmap
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Dear Jiang,


I think you have too many elements.  Keep in mind that with the SEM you need about 1/1000th of the number of elements that you would for FEM.


What is the largest SEM run you have made so far?


Best, Paul


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From: nek5000-users-bounces at lists.mcs.anl.gov<mailto:nek5000-users-bounces at lists.mcs.anl.gov> <nek5000-users-bounces at lists.mcs.anl.gov<mailto:nek5000-users-bounces at lists.mcs.anl.gov>> on behalf of nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov> <nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov>>
Sent: Monday, June 26, 2017 8:49:06 AM
To: nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov>
Subject: [Nek5000-users] genmap

Hi Neks,

Is there anyone know the reason for the following error, in which there are hundred millions of grid points in the geometry.

 ABORT: NELT>LELM, modify LELM in SIZE and recompile

I changed the LELM to be big enough, even equals to 7000000000000, but it doesn't work though. I guess the reasons would be:

1. genmap cannot regonize large elements mesh;
2. I didn't get a recompilation after changing LELM parameter since I don't know how to compile and thought genmap commond would be changed automatically when the SIZE file in /home/bin/genmap was changed.

Kind regards,

Jian
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