Dear all, I recently initiated a normal shock in the flow field and found that it is unstable with the shock capturing methods including roem or roe. I think this phenomenon may be caused by the zero velocity in y direction. Any solutions to this problem? [image: normal shock wave.jpg] ...

Author: Kiny Wan
Date: Sun, 24 Nov 2019 02:25:38 UTC
Link:

Dear all, I recently installed PyFR with "pip install pyfr==1.9.0" and opened the files of pyfr as a project in Spyder (anaconda in windows 10). Is it possible to run a simple example and debug it step by step? I want to know the code structure and data types in details. Yours Kiny ...

Author: Kiny Wan
Date: Fri, 15 Nov 2019 07:01:12 UTC
Link:

Dear All, We have released PyFR v1.9.0. New Features: - Improved strong scaling - Added support for Gmsh v4.1 - Fixed performance issue with OpenCL backend Download: http://www.pyfr.org/download.php Thanks again for your interest in the project. Peter Dr Peter Vincent MSci ARCS DIC ...

Author: Vincent, Peter E
Date: Mon, 11 Nov 2019 14:35:56 UTC
Link:

Dear all, I want to obtain the root-mean-square density of each point of the whole field and write them out like the pressure, density and velocity in .pyfrs. So, is there any way to change the [soln-plugin-writer] to get the root-mean-square density? This root-mean-square density means ...

Author: Kiny Wan
Date: Sun, 27 Oct 2019 06:48:30 UTC
Link:

Hello everyone. Recently, I used PyFR to simulate a Gauss wave propagating in a uniform flow with Mach number 0.5. Imperfectly, there exist errors between the result of PyFR and that of analytical solution. Figure 1 shows the comparison of perturbed pressure at time t=5. It is apparent to find ...

Author: Kiny Wan
Date: Sat, 12 Oct 2019 05:04:43 UTC
Link:

Hi, I opened couette_flow_2d.msh with gmsh. I see that the number of meshed are small (mean bigger polygons). I then double-clicked in the screen and used a low value for "global mesh size factor", e.g. 0.4. Then I clicked on Modules->Mesh->2D and is said "Done meshing 2D". However, screen ...

Author: Mahmood Naderan
Date: Tue, 01 Oct 2019 19:32:47 UTC
Link:

Hi, I have saved a msh file with gmsh-4.4.1, however, the import command fails with invalid mesh version. pyfr import ~/Downloads/gmsh-4.4.1-Linux64/share/doc/gmsh/demos/untitled.msh untitiled.pyfrm Traceback (most recent call last): File "/home/mahmood/.local/bin/pyfr", line 11, in ...

Author: Mahmood Naderan
Date: Sun, 29 Sep 2019 13:25:08 UTC
Link:

Hello developers, I am working on adding a new inlet boundary condition in acnavierstoke solver which allows user/me to define the value on each node from another set of solution, and also value on each node varies over time. In short, I would like to have something similar to timeVaryingMappedF ...

Author: Junting Chen
Date: Sun, 29 Sep 2019 04:49:05 UTC
Link:

Hi, I have run the following commands to build and run an example: $ python3.6 setup.py build $ python3.6 setup.py install --prefix=/home/mahmood/.local $ cd examples/couette_flow_2d/ $ pyfr import couette_flow_2d.msh couette_flow_2d.pyfrm $ pyfr run --progress -b cuda couette_flow_2d.pyfrm ...

Author: Mahmood Naderan
Date: Fri, 27 Sep 2019 06:32:20 UTC
Link:

I have a very simple problem. Flow over a 2D rectangular object. I am using .ini file of the flow over sphere example with some minimal modifications. I have generated three mesh configurations rect_simple.msh, rect_simple_fine.msh and rect_simple_finest.msh using gmsh. The only difference ...

Author: Amir Maleki
Date: Sat, 14 Sep 2019 18:40:38 UTC
Link:

Dear PyFR developers and users, I have successfully reproduced the LES simulation of the flow around a sd7003 airfoil presented in the paper (On the utility of GPU accelerated high-order methods for unsteady flow simulations: A comparison with industry-standard tools, 2017 JCP). The results are ...

Author: JG
Date: Tue, 03 Sep 2019 14:52:50 UTC
Link:

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:

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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