Dustin I was wondering if you were referring to the difference in scales of two geometrically similar configuration. If so, you could create a mesh with H=28 mm (Reference [31] in the paper you provided) and then scale it up to achieve a geometry with H=1 m. Kind regards syavash On Tue, Mar 21, 2023, 22:43 Ma, Ting-Hsuan <TIM48@pitt.edu> wrote:

Hi Syavash,

I have not been able to find cases where H = 1 [m]. The only from scratch creation, I was able to find is for H = 28 [mm]. If you could point me in the right direction, that would be most helpful.

The current mesh that I am working with is from the example provided in my previous thread. This mesh however doesn’t allow for me to separate between a top and bottom boundary. Although, there are ways around this, it is time consuming and prone to errors. I am just trying to keep the same mesh as the baseline case that I am currently running, while including this modification on the boundaries so I can make slight changes and see how that effects the simulation overall.

Thanks,

--

Dustin (Ting-Hsuan) Ma

Graduate Researcher

Department of Mechanical and Materials Science

University of Pittsburgh

Tim48@pitt.edu

*From: *Ehsan Asgari <eh.asgari@gmail.com> *Date: *Tuesday, March 21, 2023 at 3:07 PM *To: *Ma, Ting-Hsuan <TIM48@pitt.edu>, nektar-users@imperial.ac.uk < nektar-users@imperial.ac.uk> *Subject: *Re: [Nektar-users] Extract .geo file from .xml file

Hi Dustin

Is there a specific reason for not creating a mesh from scratch? The period hill is a well-known benchmark with analytical geometry definition.

Kind regards

syavash

On Tue, Mar 21, 2023, 21:47 Ma, Ting-Hsuan <TIM48@pitt.edu> wrote:

This email from TIM48@pitt.edu 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://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fspam.ic.ac.uk%2FSpamConsole%2FSenders.aspx&data=05%7C01%7CTIM48%40pitt.edu%7C142f14b069d4407d6e8f08db2a3f87e1%7C9ef9f489e0a04eeb87cc3a526112fd0d%7C1%7C0%7C638150224579179419%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=VWHLRgb7q8Sohe8ubtufwFYjtpB6yHgNmJOLtNY7E%2Bg%3D&reserved=0> to disable email stamping for this address.

Hi,

I am working on reverse creating the periodic hill case provided in appendix A of https://www.sciencedirect.com/science/article/pii/S0010465515000533?via%3Dih... <https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0010465515000533%3Fvia%253Dihub%23s000140&data=05%7C01%7CTIM48%40pitt.edu%7C142f14b069d4407d6e8f08db2a3f87e1%7C9ef9f489e0a04eeb87cc3a526112fd0d%7C1%7C0%7C638150224579335648%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=drrq%2BKuxlw0yCuzLitYRpT%2FlQe5iepTE0f6Nj6V%2FhhE%3D&reserved=0> . Whist working on this, I was able to use python to extract the vertex and line information from the .xml file provided However, even doing so does not provide a straight forward way for me to separate the noslip boundaries into a top and bottom boundary. Furthermore, when I loaded this extracted version into Gmsh, some errors did arise and the mesh seems to be more complicated than what I would have hoped.

I would like to know if anyone has done this in the past? If so, could you give me a walkthrough of how you could successfully recreate this mesh? Or if there are ways existing out there that’ll allow me to separate the noslip boundary condition into 2 sub categories.

Thanks,

Dustin Ma

_______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/nektar-users <https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailman.ic.ac.uk%2Fmailman%2Flistinfo%2Fnektar-users&data=05%7C01%7CTIM48%40pitt.edu%7C142f14b069d4407d6e8f08db2a3f87e1%7C9ef9f489e0a04eeb87cc3a526112fd0d%7C1%7C0%7C638150224579335648%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SaN6ncXFbGJaNYuL1b1IPdbueNp2sRKhPjSAr680TC0%3D&reserved=0>