# Mailing List

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## Recent Topics

Dear PyFR developers, In our in-house Spectral-Differences (SD) code, we have recently found a small bug related to the gradient computation. This bug was discovered by testing the k-exact properties of the gradient operator. I first implemented this test in PyFR to better understand if our ...

Author: Gonzalo Sáez
Date: Tue, 20 Oct 2020 21:07:20 UTC
Hi, We have 4 Nvidia SXM2 V100's on a single node. I noticed that our system-available MPI library (Openmpi 3.1.0) was not compiled with any Cuda support, and I am worried that we may be losing out on some performance. This version of the V100 should support extremely fast GPU-GPU communication ...

Author: Michael Laufer
Date: Sat, 17 Oct 2020 21:51:04 UTC
Dear PyFR developers, I would like to reproduce the results of the cylinder at Re = 3900 of your articles: - On the utility of GPU accelerated high-order methods for unsteady flow simulations: A comparison with industry-standard tools - Heterogeneous computing on mixed unstructured grids with ...

Author: Anthony Larroque
Date: Tue, 13 Oct 2020 16:23:44 UTC
Hello Everyone, I have a question regarding the order of accuracy of the ACM method; Have you done any tests using the method of manufactured solutions ( published or otherwise) ? I tried the 2D taylor green benchmark but the order of accuracy I am getting is nowhere near what it should be. ...

Author: mkamra
Date: Tue, 06 Oct 2020 14:47:28 UTC
Dear PyFR developers, I was wondering if you could help me with my test case. I have a modest OLCF Summit allocation to test strong scaling of ACM for an internal flow simulation and I am trying to set it up in PyFR using Loppi et al files. My target geometry is a double elbow, but I am ...

Author: Robert Sawko
Date: Wed, 30 Sep 2020 21:55:51 UTC
I'm running the examples given in the PyFR GitHub repo. To run with OpenMP I use the following command: $pyfr run -b openmp -p couette_flow_2d.pyfrm couette_flow_2d.ini To run with CUDA I use this command:$ pyfr run -b cuda -p couette_flow_2d.pyfrm couette_flow_2d.ini When running the ...

Author: Gavin Wiggins
Date: Wed, 30 Sep 2020 15:05:28 UTC
I'm trying to run the Couette flow example using the CUDA backend via the following command: \$ pyfr run -b cuda -p couette_flow_2d.pyfrm couette_flow_2d.ini But I get the following error: File "/home/cades/miniconda3/lib/python3.8/site-packages/pyfr/backends/cuda/cublas.py", line 78, in ...

Author: Gavin Wiggins
Date: Sat, 26 Sep 2020 01:11:42 UTC
In the PyFR GitHub repository there is a "doc" directory. It looks like this directory is for building the documentation with Sphinx. But where is the documentation hosted? Is it just the main PyFR website at http://www.pyfr.org? ...

Author: Gavin Wiggins
Date: Thu, 24 Sep 2020 14:45:03 UTC
Is there a certain workflow that people should follow to contribute to PyFR on GitHub? I noticed the repository shows the develop branch by default. Should Pull Requests be made to the develop branch or to the master branch? ...

Author: Gavin Wiggins
Date: Tue, 22 Sep 2020 15:21:43 UTC
Hi all, I am facing a very weird problem in PyFR. I am trying to run a simple cylinder case similar to that of PyFR tutorial, meshing it using the GMsh. When I am running the case with nodes 8726 the simulations run perfectly and I am able to get the results (not sure if accurate or not). But ...

Author: Chandra Shekhar Pant
Date: Thu, 10 Sep 2020 07:08:57 UTC
Hello PyFR Community, I'm currently trying to recreate the simulations from the paper of Park, Vincent and Witherden (2017) on a NACA0021 Aerofoil in deep stall. I am using the provided mesh and configuration file for the p4.ini file and p4_mesh and started with a warmup phase until t=100 with ...

Author: Anh Vu Nguyen
Date: Fri, 04 Sep 2020 10:02:25 UTC
Hi all, I am trying to simulate a jet using the PyFR. To trigger the turbulence/instability I need to include the inlet/initial fluctuations in the velocity field. Is this easily doable, how to do that? Any suggestion and comment will help me a lot. Thanks in advance. ...

Author: Chandra Shekhar Pant
Date: Tue, 25 Aug 2020 07:16:06 UTC
Hello All, I am very new to the group as well to the PyFR, so please excuse me for my naive query. I am trying to import a 3D cylinder mesh (from gmsh) to PyFR but getting the following errors: Traceback (most recent call last): File "/home/csp/anaconda3/bin/pyfr", line 10, in ...

Author: Chandra Shekhar Pant
Date: Mon, 27 Jul 2020 14:37:41 UTC
Dear all, I want to validate a benchmark example about vortex pairing [1] and it requires to initialize solution with the pressure and density obtained from Poisson equation. I would like to know about how to use the function of patch.patch to load the data for initialization? Regards ...

Author: Kiny Wan
Date: Mon, 27 Jul 2020 13:12:03 UTC
Dear all, I want to use '[soln-plugin-sampler]' for sampling, but sometimes there are more than three sampling points and each accompanies with long data series. I would like to ask about how to write different samplers into specific files in PyFR? [soln-plugin-sampler] nsteps = 1 ...

Author: Kiny Wan
Date: Sat, 25 Jul 2020 07:10:06 UTC

## Latest Release

PyFR 1.10.0:

• Added support for writing specific regions of the domain to disk.
• Fixed statistics collection for dual time stepping integrators.