Turbulence model in PyFR

[Junichi Fukui]

Dear All,

I have read an article "Brian C. Vermeire, Freddie D. Witherden, Peter E. Vincent: On the utility of GPU accelerated high-order methods for unsteady flow simulations: A comparison with industry-standard tools. J. Comput. Physics 334: 497-521 (2017).", and I am trying to simulate the circular cylinder and SD7003 aerofoil cases. Thank you for providing the mesh and setup files for the simulation cases in the article by the authors, and update the setup file of the SD7003 case for recent PyFR code by Robert.

I have questions about turbulence model used in the cases as described below.

1. In the cylinder case, implicit large eddy simulation (ILES) was used in PyFR simulation. Is the ILES function available in latest PyFR v1.6.0?

2. Regarding the SD7003 case, the WALE subgrid scale model was used in the STAR-CCM+ simulation. Was PyFR run without any turbulence model in the SD7003 case?

Best regards,
Junichi

[Brian Vermeire]

Hi Junichi,

In both the cylinder and SD7003 cases in the paper you cited we used an Implicit LES (ILES) approach. With ILES we rely on the inherent numerical dissipation of the flux reconstruction approach at high frequencies to act as an implicit sub grid scale model for the un-resolved scales. Therefore, there is no explicit SGS model currently implemented in PyFR. You can read more about ILES using flux reconstruction here: "B.C. Vermeire, S. Nadarajah, P.G. Tucker, Implicit large eddy simulation using the high-order correction procedure via reconstruction scheme. Int. J. Numer. Meth. Fluids 2016; 82:231–260". The introduction has a general discussion about the approach.

--
You received this message because you are subscribed to the Google Groups "PyFR Mailing List" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pyfrmailinglist+unsubscribe@googlegroups.com.
To post to this group, send email to pyfrmailinglist@googlegroups.com.
Visit this group at https://groups.google.com/group/pyfrmailinglist.
For more options, visit https://groups.google.com/d/optout.

--

Dr. Brian Vermeire BESc MESc PhD
Postdoctoral Scholar
Department of Aeronautics
Imperial College London
South Kensington
London, UK, SW7 2AZ

[Junichi Fukui]

Dear Brian,

Thank you for your information about ILES. I have downloaded and read the article you told me. I'm interesting in the concept of LES simulation without explicit SGS term in flux reconstruction. I will try simulation of high speed flow in de Laval nozzle and cavity flow using PyFR.

Best regards,
Junichi


2017年3月29日水曜日 23時09分03秒 UTC+9 Brian Vermeire:

Hi Junichi,

In both the cylinder and SD7003 cases in the paper you cited we used an Implicit LES (ILES) approach. With ILES we rely on the inherent numerical dissipation of the flux reconstruction approach at high frequencies to act as an implicit sub grid scale model for the un-resolved scales. Therefore, there is no explicit SGS model currently implemented in PyFR. You can read more about ILES using flux reconstruction here: "B.C. Vermeire, S. Nadarajah, P.G. Tucker, Implicit large eddy simulation using the high-order correction procedure via reconstruction scheme. Int. J. Numer. Meth. Fluids 2016; 82:231–260". The introduction has a general discussion about the approach.

On Wed, Mar 29, 2017 at 6:13 AM, Junichi Fukui <blackc...@gmail.com> wrote:

Dear All,

I have read an article "Brian C. Vermeire, Freddie D. Witherden, Peter E. Vincent: On the utility of GPU accelerated high-order methods for unsteady flow simulations: A comparison with industry-standard tools. J. Comput. Physics 334: 497-521 (2017).", and I am trying to simulate the circular cylinder and SD7003 aerofoil cases. Thank you for providing the mesh and setup files for the simulation cases in the article by the authors, and update the setup file of the SD7003 case for recent PyFR code by Robert.

I have questions about turbulence model used in the cases as described below.

1. In the cylinder case, implicit large eddy simulation (ILES) was used in PyFR simulation. Is the ILES function available in latest PyFR v1.6.0?

2. Regarding the SD7003 case, the WALE subgrid scale model was used in the STAR-CCM+ simulation. Was PyFR run without any turbulence model in the SD7003 case?

Best regards,
Junichi

--
You received this message because you are subscribed to the Google Groups "PyFR Mailing List" group.

To unsubscribe from this group and stop receiving emails from it, send an email to pyfrmailingli...@googlegroups.com.
To post to this group, send email to pyfrmai...@googlegroups.com.

Visit this group at https://groups.google.com/group/pyfrmailinglist.
For more options, visit https://groups.google.com/d/optout.

[王跃]

Dear Junichi:

    Could you kindly share me the mesh and setup files of the circular cylinder and SD7003 aerofoil cases?
   

Best regards!
Yue

在 2017年3月29日星期三 UTC+8下午6:13:01，Junichi Fukui写道：

[Junichi Fukui]

Dear Yue,

I have downloaded the mesh and setup files of the cases from following site.

  https://www.sciencedirect.com/science/article/pii/S0021999116307136#se0220

There is zip file included the case files at "Appendix A. Supplementary material" on the site.

Best regards,
Junichi


2017年12月25日月曜日 18時05分06秒 UTC+9 王跃: