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Dear Bofu,
Thanks for your email and sorry for the late reply.
I have attached the rbc_DNS.xml and rbc_stability.xml for DNS and the
stability analysis. The stability analysis is performed for Ra=2000,
which should yield growth rate of 1.8775. I have also attached the plot of
the corresponding eigenmode.
Please use Nektar++ 5 (latest version from gitlab). Let me know if you
have any more questions.
With best regards
Abhishek
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Abhishek Kumar
Assistant Professor (Research)
Centre for Fluid and Complex Systems
Coventry University, Coventry CV15FB
The United Kingdom
Phone: +44 24 7765 9150
Mobile: +44 7464026494
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[image: eigen_mode.png]
On Tue, Oct 6, 2020 at 1:26 AM bofu wang <bofuwang86(a)gmail.com> wrote:
> Dear Abhishek,
>
> Thanks a lot for sharing this. Could please provide an example input *.xml
> file for simulation of natural convection? I know how to use nektar++, but
> I haven't tried any thermal convection case yet. By the way, I am very
> interested in your wonderful work published in JFM, I also want to ask
> would it possible to perform stability analysis for thermal convection with
> the nektar5? Thank you again!
>
> All the best!
> Bofu
>
> Abhishek Kumar（通过Google 云端硬盘发送） <abhishek.kir(a)gmail.com> 于2020年10月5日周一
> 下午8:29写道：
>
>> abhishek.kir(a)gmail.xn--com:-794fmz1hrq4e77xg45d
>> nektar++_4p5.zip
>> <https://drive.google.com/file/d/1OkhnVBRn6sJuJ3YvHXoI_PBGHmzwzeC9/view?usp=…>
>> [image: Unknown profile photo]Hi Bofu,
>>
>> Note that now this feature is in the latest version of Nektar5.
>> 打开
>> <https://drive.google.com/file/d/1OkhnVBRn6sJuJ3YvHXoI_PBGHmzwzeC9/view?usp=…>
>> Google云端硬盘：随时随地在任意设备上使用自己的所有文件。
>> Google LLC, 1600 Amphitheatre Parkway, Mountain View, CA 94043, USA [image:
>> Google 云端硬盘的徽标] <http://drive.google.com>
>>
>
--
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Dear all,
I wonder the options of the C0Projection module. Could you please help me with it?
First, the option 'localtoglobalmap' is cheap to perform. However, sometimes it may cause some interpolation problems, leading to a different result compared with the expansive default one. I want to know which
option is better for the precision of results?
Second, since the value of Q-Criterion and vorticity is very high near the wall region, which may cause inconvenience when post-processing, will the option 'usexmlbcs' improve it?
I will be very grateful with your kind reply.
Many thanks,
Zhaoyu Wang
Shanghai Jiao Tong University
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Dear Nektar users,
I found an issue in moving cylinder problem in NEKTAR tests. I want to perform quasi 3D simulations over an oscillating cylinder by using mapping function. However, the velocity in the span direction (w) disappears after around 20,000 time-steps. In fact, the problem becomes full-2D after some time steps!
I've tested various initial conditions for w, such as awgn(1) or awgn(1)*cos(2*PI*z/LZ), etc., and different mapping types, but I could not resolve it.
I would be grateful if you could help me how to resolve this issue. The xml file and a screenshot are attached.
Best regards,
Mahdi
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