Torque of a rotating body under crossflow
******************* 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. ******************* Hello all, I'm currently using the incompressible Navier-Stokes tool to measure the stability of bodies under torsional oscillation and I'm wondering if the IncNavierStokesSolver algorithm provides the value of the torque caused by the fluid in the body. Could you please provide me this information and, if possible, where to get it? Thanks in advance, Best regards. Victor Peron Department of Mechanical Engineering Escola Politécnica da Universidade de São Paulo
Hello Victor, It seems to me that Nektar++ has not implemented the torque output for the moving body yet. I have modified the FilterMovingBody class to include the calculation and output of moment based on some code from FilterAeroForces class ( https://gitlab.nektar.info/nektar/nektar/-/blob/feature/IncNS-FSI/library/So...), and the modified files are attached. I hope it will work for you. P.S., I am also working on simulation of flow around a rotating body, and got stuck on setting up the case. Could you share some experiences? Best wishes, Yong wang Ph.D. Student National Wind Institute Texas Tech University Lubbock, TX, United States On Tue, Oct 13, 2020 at 7:45 PM Victor Hugo Santiago Peron < victor.peron@usp.br> wrote:
This email from victor.peron@usp.br 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.
Hello all,
I'm currently using the incompressible Navier-Stokes tool to measure the stability of bodies under torsional oscillation and I'm wondering if the IncNavierStokesSolver algorithm provides the value of the torque caused by the fluid in the body.
Could you please provide me this information and, if possible, where to get it?
Thanks in advance,
Best regards.
Victor Peron Department of Mechanical Engineering Escola Politécnica da Universidade de São Paulo _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/nektar-users
Hi Both, Thanks for the question and response. Indeed we only have the moment calculation implemented currently in a branch related to FSI. If one of you felt so inclined could you submit a merge request of this modification by adding it to the current master and following the instruction for a MR under the nektar.info<http://nektar.info> web page and then going to Community->Contributions Thanks, Spencer. Spencer Sherwin FREng, FRAeS Head of Aerodynamics Section, Director of Research Computing Service, Professor of Computational Fluid Mechanics, Department of Aeronautics, South Kensington Campus, Imperial College London, SW7 2AZ, UK Phone: +44 (0)20 7594 5052 http://www.imperial.ac.uk/people/s.sherwin/ On 14 Oct 2020, at 02:33, Yong Wang <yongwang.ttu@gmail.com<mailto:yongwang.ttu@gmail.com>> wrote: Hello Victor, It seems to me that Nektar++ has not implemented the torque output for the moving body yet. I have modified the FilterMovingBody class to include the calculation and output of moment based on some code from FilterAeroForces class (https://gitlab.nektar.info/nektar/nektar/-/blob/feature/IncNS-FSI/library/So...), and the modified files are attached. I hope it will work for you. P.S., I am also working on simulation of flow around a rotating body, and got stuck on setting up the case. Could you share some experiences? Best wishes, Yong wang Ph.D. Student National Wind Institute Texas Tech University Lubbock, TX, United States On Tue, Oct 13, 2020 at 7:45 PM Victor Hugo Santiago Peron <victor.peron@usp.br<mailto:victor.peron@usp.br>> wrote: This email from victor.peron@usp.br<mailto:victor.peron@usp.br> 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. Hello all, I'm currently using the incompressible Navier-Stokes tool to measure the stability of bodies under torsional oscillation and I'm wondering if the IncNavierStokesSolver algorithm provides the value of the torque caused by the fluid in the body. Could you please provide me this information and, if possible, where to get it? Thanks in advance, Best regards. Victor Peron Department of Mechanical Engineering Escola Politécnica da Universidade de São Paulo _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users <FilterMovingBody.cpp><FilterMovingBody.h>_______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users
******************* 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. ******************* Hello Prof. Sherwin, I will recheck these modifications and submit a merge request. I also have a question about the simulation of flow around rotating bodies (such as bridge rotational VIV or flutter). I got stuck on setting up the case with the XYofXY coordinate transformation map (IncNavierStokesSolver produces segmentation fault) and haven't found related examples nor tutorials. I wonder if this approach is capable of simulating flow around rotating bodies in Nektar++ like in your papers (Li et al., 2002; Robertson et al., 2003a; Robertson et al., 2003b), or I made some mistakes in setting up the case (session file is also attached). Li, L., Sherwin, S.J., Bearman, P.W., 2002. A moving frame of reference algorithm for fluid/structure interaction of rotating and translating bodies. International Journal for Numerical Methods in Fluids 38, 187–206. https://doi.org/10.1002/fld.216 Robertson, I., Li, L., Sherwin, S.J., Bearman, P.W., 2003a. A numerical study of rotational and transverse galloping rectangular bodies. Journal of Fluids and Structures 17, 681–699. https://doi.org/10.1016/S0889-9746(03)00008-2 Robertson, I., Sherwin, S.J., Bearman, P.W., 2003b. Flutter instability prediction techniques for bridge deck sections. Int. J. Numer. Meth. Fluids 43, 1239–1256. https://doi.org/10.1002/fld.535 Best wishes, Yong wang Ph.D. Student National Wind Institute Texas Tech University Lubbock, TX, United States
hi Yong Wang, This is a good question. i believe this should be the way to go. For another project Mohsen is undertaking we also need to check out this feature so I am cc’ing him on the email so that we might iterate a bit as we test things out. Cheers, Spencer. Spencer Sherwin FREng, FRAeS Head of Aerodynamics Section, Director of Research Computing Service, Professor of Computational Fluid Mechanics, Department of Aeronautics, South Kensington Campus, Imperial College London, SW7 2AZ, UK Phone: +44 (0)20 7594 5052 http://www.imperial.ac.uk/people/s.sherwin/ On 14 Oct 2020, at 15:47, Yong Wang <yongwang.ttu@gmail.com<mailto:yongwang.ttu@gmail.com>> wrote: Hello Prof. Sherwin, I will recheck these modifications and submit a merge request. I also have a question about the simulation of flow around rotating bodies (such as bridge rotational VIV or flutter). I got stuck on setting up the case with the XYofXY coordinate transformation map (IncNavierStokesSolver produces segmentation fault) and haven't found related examples nor tutorials. I wonder if this approach is capable of simulating flow around rotating bodies in Nektar++ like in your papers (Li et al., 2002; Robertson et al., 2003a; Robertson et al., 2003b), or I made some mistakes in setting up the case (session file is also attached). Li, L., Sherwin, S.J., Bearman, P.W., 2002. A moving frame of reference algorithm for fluid/structure interaction of rotating and translating bodies. International Journal for Numerical Methods in Fluids 38, 187–206. https://doi.org/10.1002/fld.216 Robertson, I., Li, L., Sherwin, S.J., Bearman, P.W., 2003a. A numerical study of rotational and transverse galloping rectangular bodies. Journal of Fluids and Structures 17, 681–699. https://doi.org/10.1016/S0889-9746(03)00008-2 Robertson, I., Sherwin, S.J., Bearman, P.W., 2003b. Flutter instability prediction techniques for bridge deck sections. Int. J. Numer. Meth. Fluids 43, 1239–1256. https://doi.org/10.1002/fld.535 Best wishes, Yong wang Ph.D. Student National Wind Institute Texas Tech University Lubbock, TX, United States <CylFlow_Rot.xml>
participants (3)
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Sherwin, Spencer J
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Victor Hugo Santiago Peron
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Yong Wang