******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Dear Nektar++, I am learning to use Nektar++ and am very interested in the content related to Floquet stability analysis. But I encountered a problem: I found an example of ‘BiGlobal Floquet analysis of flow past a cylinder’ in section 7.5.12 of user-guide-4.0.0, but I don’t know how to set the BasicFlow function. It says that ’ In order to reconstruct the temporal behaviour of the flow, 32 time slices were considered over one period.’, I don’t know how to implement this operation. <FUNCTION NAME="BaseFlow"> <F VAR="u,v,p" FILE="cyinder_floq" /> </FUNCTION> I attempted to find the ‘cylinder_floq’ file mentioned in the above example but failed. In addition, I find this in 7.4.2 Parameters: ‘N_slices : sets the number of temporal slices for Floquet stability analysis.’ but I don't know how to use it. In addition, I tried to put several .chk files from basic flow calculations in a folder as snapshots for stability analysis, but it didn't work. Could you please provide me with this complete example? Or any other useful information will be appreciated. Looking for some help, please! Regards, Xiangjun x_j_shan@outlook.com<mailto:x_j_shan@outlook.com> 发送自 Windows 10 版邮件<https://go.microsoft.com/fwlink/?LinkId=550986>应用
Hi Xiangjun, You can use “cylinder_base_%d.chk” to input a series of baseflows into the Floquet analysis as, <FUNCTION NAME="BaseFlow"> <F VAR="u,v,p" FILE="cylinder_base_%d.chk" /> </FUNCTION> Please note that the base flows should be named from *_0.chk to *_N-1.chk, where N is the number of slices you used for Floquet analysis. Hope this can help! Kind regards, Chengjiao ===================================== 任珵娇；Chengiiao Ren， 博士研究生；Ph.D Candidate， 建设工程学部；Faculty of Infrastructure Engineering， 大连理工大学； Dalian University of Technology， 大连，中国 116024；Dalian，CHINA 116024. 电话，Phone：86-18504285808，61-413077330 电子邮箱，Email：dlut_renchengjiao@163.com; chengjiao.ren@outlook.com; ===================================== From: shan xiangjun Sent: Monday, 21 September 2020 1:47 PM To: Nektar-users@imperial.ac.uk Subject: [Nektar-users] About BaseFlow in Floquet stability analysis This email from x_j_shan@outlook.com originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list to disable email stamping for this address. Dear Nektar++, I am learning to use Nektar++ and am very interested in the content related to Floquet stability analysis. But I encountered a problem: I found an example of ‘BiGlobal Floquet analysis of flow past a cylinder’ in section 7.5.12 of user-guide-4.0.0, but I don’t know how to set the BasicFlow function. It says that ’ In order to reconstruct the temporal behaviour of the flow, 32 time slices were considered over one period.’, I don’t know how to implement this operation. <FUNCTION NAME="BaseFlow"> <F VAR="u,v,p" FILE="cyinder_floq" /> </FUNCTION> I attempted to find the ‘cylinder_floq’ file mentioned in the above example but failed. In addition, I find this in 7.4.2 Parameters: ‘N_slices : sets the number of temporal slices for Floquet stability analysis.’ but I don't know how to use it. In addition, I tried to put several .chk files from basic flow calculations in a folder as snapshots for stability analysis, but it didn't work. Could you please provide me with this complete example? Or any other useful information will be appreciated. Looking for some help, please! Regards, Xiangjun x_j_shan@outlook.com 发送自 Windows 10 版邮件应用
participants (2)
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Chengjiao Ren
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shan xiangjun