2d axisymmetric model and LES requeriments
Dear Nektar team, I trying to model the experiment developed by HIshida 1987. (Hishida, K., Maeda, M., 1987. Turbulent characteristics of gas–solids two-phase confined jet: effect of particle density. Jpn. J. Multiphase Flow 1, 56–69.) The problem is the Re number is near to 3E4, then the model is computationally expensive. Here my questions: 1. Is it possible to developed an axisymmetric model in Nektar++ ? I found this file http://prism.ac.uk/wp-content/uploads/2014/07/gabriele2014.pdf, on this said that G. Rocco is working or worked on it. May I implement the model based on his work ? 2. For this 3D model, the mesh requirements are about 3E10, If I use a LES model with SVVCutoffRatio=0.5N and SVVDiffCoeff=0.5, how can I evaluate the new mesh requirements Thanks in advance for your comments, --- Manuel Felipe Mejía De Alba.
Hi, Sorry I have been very tied up with a number of meetings this past month. We have not yet progressed very far with our axisymmetric model. There is a model of this type in Semtex by Hugh Blackburn who we have close interactions with so you may wish to look at this code. Your second question is a very good one but unfortunately I do not yet know how to answer it. We are trying to understand how our choice of SVV parameters relates to a cut-off of scales in the flow but currently we do not have a robust answer. Cheers, Spencer. On 5 Sep 2016, at 22:08, Manuel F. Mejía De Alba <manu2958@gmail.com<mailto:manu2958@gmail.com>> wrote: Dear Nektar team, I trying to model the experiment developed by HIshida 1987. (Hishida, K., Maeda, M., 1987. Turbulent characteristics of gas–solids two-phase confined jet: effect of particle density. Jpn. J. Multiphase Flow 1, 56–69.) The problem is the Re number is near to 3E4, then the model is computationally expensive. Here my questions: 1. Is it possible to developed an axisymmetric model in Nektar++ ? I found this file http://prism.ac.uk/wp-content/uploads/2014/07/gabriele2014.pdf, on this said that G. Rocco is working or worked on it. May I implement the model based on his work ? 2. For this 3D model, the mesh requirements are about 3E10, If I use a LES model with SVVCutoffRatio=0.5N and SVVDiffCoeff=0.5, how can I evaluate the new mesh requirements Thanks in advance for your comments, --- Manuel Felipe Mejía De Alba. _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users Spencer Sherwin McLaren Racing/Royal Academy of Engineering Research Chair, Professor of Computational Fluid Mechanics, Department of Aeronautics, Imperial College London South Kensington Campus London SW7 2AZ s.sherwin@imperial.ac.uk<mailto:s.sherwin@imperial.ac.uk> +44 (0) 20 759 45052
Hi Spencer and Nektar-Users, I am going to implement this model (http://math.unice.fr/~rpas/publis/JoT.pdf) to start to try to figure out it. Thanks for your reply. On 26 September 2016 at 15:08, Sherwin, Spencer J <s.sherwin@imperial.ac.uk> wrote:
Hi,
Sorry I have been very tied up with a number of meetings this past month.
We have not yet progressed very far with our axisymmetric model. There is a model of this type in Semtex by Hugh Blackburn who we have close interactions with so you may wish to look at this code.
Your second question is a very good one but unfortunately I do not yet know how to answer it. We are trying to understand how our choice of SVV parameters relates to a cut-off of scales in the flow but currently we do not have a robust answer.
Cheers, Spencer.
On 5 Sep 2016, at 22:08, Manuel F. Mejía De Alba <manu2958@gmail.com> wrote:
Dear Nektar team,
I trying to model the experiment developed by HIshida 1987. (Hishida, K., Maeda, M., 1987. Turbulent characteristics of gas–solids two-phase confined jet: effect of particle density. Jpn. J. Multiphase Flow 1, 56–69.) The problem is the Re number is near to 3E4, then the model is computationally expensive. Here my questions:
1. Is it possible to developed an axisymmetric model in Nektar++ ? I found this file http://prism.ac.uk/wp-content/uploads/2014/07/gabriele2014.pdf, on this said that G. Rocco is working or worked on it. May I implement the model based on his work ?
2. For this 3D model, the mesh requirements are about 3E10, If I use a LES model with SVVCutoffRatio=0.5N and SVVDiffCoeff=0.5, how can I evaluate the new mesh requirements
Thanks in advance for your comments, --- Manuel Felipe Mejía De Alba. _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/nektar-users
Spencer Sherwin McLaren Racing/Royal Academy of Engineering Research Chair, Professor of Computational Fluid Mechanics, Department of Aeronautics, Imperial College London South Kensington Campus London SW7 2AZ
s.sherwin@imperial.ac.uk +44 (0) 20 759 45052
-- --- Manuel Felipe Mejía De Alba.
participants (2)
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Manuel F. Mejía De Alba
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Sherwin, Spencer J