Hello, I am trying to use PyFR in a compressible flow passing through a nozzle an expanding in a chamber. For this case, I would like to set total pressure and static pressure, respectively in the inlet and outlet boundaries. Could anyone give some advice on how to use the appropriate boundary ...

Author: Douglas Fontes
Date: Tue, 20 Aug 2019 18:55:09 UTC
Link:

I am wondering if someone can comment on the TGV results (case2) in Loppi et al. Computer Physics Communications 233 (2018). It looks like the wall-clock time is quite high compared to incompressible flow solvers. Is this because of the method to handle low Mach number flows with a compressible ...

Author: Stefan K.
Date: Thu, 08 Aug 2019 21:09:50 UTC
Link:

Hello all, I am trying to find a proper reason for the statement of "PyFR has a good utilization of GPU acceleration technology" , or possibly refer to a paper. I understand that memory transfer between CPU and GPU is one of the big slowdowns of GPU computing. How would you say PyFR as a modern ...

Author: Junting Chen
Date: Thu, 25 Jul 2019 19:47:05 UTC
Link:

Hello, Any work ongoing to make the computation in pseudo time steps implicit? As Niki mentioned, implicit pseudo time stepper caused storage issues (in one of the posts). Any chance an implicit option can be offered in the next release? Explicit forces pseudo dt being extremely small therefore ...

Author: Junting Chen
Date: Mon, 15 Jul 2019 21:30:46 UTC
Link:

Dear developers of PyFR, I would like to thank your team for providing the wonderful code PyFR for the high-fidelity CFD simulation. I am quite interested in this code, especially in the LES simulation of external flow around aerodynamic bodies. Currently, I am running the case of the flow around ...

Author: JG
Date: Fri, 05 Jul 2019 00:44:20 UTC
Link:

Hello all, I am experiencing failures from the writer function occasionally. For instance, once I have - [soln-plugin-writer] dt-out = 50 basedir = . basename = concaveTower_{t:04.0f} - in the ini file, and this simulation started from t=1800. It supposed to write out a file at t=1850 but ...

Author: Junting Chen
Date: Wed, 03 Jul 2019 14:50:55 UTC
Link:

Hello, Is there a way to modify simulation setup (ie. order of scheme, write frequency...) in the middle of a run? For example I want to initialize a run with 4th order scheme by the result of 2nd-order, or restart with a different write frequency. I am asking this since the command "pyfr ...

Author: Junting Chen
Date: Tue, 25 Jun 2019 21:23:22 UTC
Link:

Hello Dr.Witherden, Since our discuss was nothing related to OpenMP or cuda, I think it would be better to open another thread. So today instead of "u = 20", I used "u = 0.0583090", normalized by the speed of sound. I have tried cases such as: - 2nd order and 4th order (to see result ...

Author: Junting Chen
Date: Wed, 19 Jun 2019 21:09:06 UTC
Link:

Hello, I'm eagerly and gradually learning PyFR. I've run the 2D Couette flow tutorial in the examples folder bundled with PyFR 1.8. Now I'm struggling to interpret the behaviour. 1. The example is setup with order p = 2 and a timestep size of dt = 0.00004. When I increase the order to p = 4, ...

Author: Joshua Brinkerhoff
Date: Thu, 13 Jun 2019 23:29:28 UTC
Link:

Hello developers, I am on a task of testing several CFD codes with the goal of finding one that suits the best of our needs. I am seeing a lot of potential in PyFR and would like to run a couple of cases on it. The 2d cases that came with the program are nice. Strange thing is that two or more ...

Author: Junting Chen
Date: Tue, 11 Jun 2019 22:26:27 UTC
Link:

Dears, I am trying to use PyFR as a tool for my research. However, I am having some difficulties to obtain simple results in a 2D backward-facing step flow case. I have tried to run this case considering incompressible and compressible flow. However, even I reduce the Courant number (reducing ...

Author: Douglas Fontes
Date: Tue, 04 Jun 2019 13:25:14 UTC
Link:

Hi, I realise this is a bit out of scope for this mailing list. PyFR focus is on single phase compressible and more recently incompressible flows. Nevertheless, please let me advertise an internship programme we will be running at IBM this Autumn. https://www.research.ibm.com/labs/uk/interns ...

Author: Robert Sawko
Date: Mon, 20 May 2019 09:59:23 UTC
Link:

Hello, I would like to simulate with PyFR the flow around a cylinder with blowing and suction on the wall. I saw that in the user guide of PyFR, for the wall boundary conditions, it was only possible to specify the velocity with a float. Thus, is there a way to specify blowing/suction condition ...

Author: Anthony Larroque
Date: Fri, 17 May 2019 18:06:15 UTC
Link:

Hello! I would like to know about models for turbulence closure on PyFR. Which models are implemented on it? Is there any RANS model? Thank you so much. ...

Author: Douglas Fontes
Date: Fri, 26 Apr 2019 20:08:33 UTC
Link:

Hello, I am trying to use Ennova software to generate meshes for PyFR. However, Ennova does not export gmsh mesh. So, I export the mesh to .vtk format, then I use gmsh to convert .vtk mesh to .msh mesh. Despite all these conversions, PyFR is not being able to read this .msh mesh. I am sending ...

Author: Douglas Fontes
Date: Fri, 29 Mar 2019 14:04:13 UTC
Link:

Summary: A fully funded Postdoctoral position is currently available. The project, will involve development of PyFR, an open-source high-order massively-parallel cross-platform CFD solver, as well as its application to solve a range of challenging unsteady flow problems. Candidates should hold, or expect to obtain, a PhD in a numerate discipline from a world-leading university.

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