# General **URL:** https://pyfr.discourse.group/c/general/9.md?page=2 [Latest](https://pyfr.discourse.group/latest.md) · [Categories](https://pyfr.discourse.group/categories.md) · [Tags](https://pyfr.discourse.group/tags.md) **Page:** 3 --- ## [Search for industrial case in paper using PyFR](https://pyfr.discourse.group/t/search-for-industrial-case-in-paper-using-pyfr/663)
**Author:** [@luli](https://pyfr.discourse.group/u/luli)\ **Replies:** 6\ **Last updated:** [5 August 2022 08:25 UTC](https://pyfr.discourse.group/t/search-for-industrial-case-in-paper-using-pyfr/663 "2022-08-05T08:25:16Z")
Is there such an Industrial case (such as airfoil) in any paper that can show the comparison between PyFR and experimental results ? --- ## [Simulating stall in 2D](https://pyfr.discourse.group/t/simulating-stall-in-2d/660)
**Author:** [@FedericoCipolletta](https://pyfr.discourse.group/u/FedericoCipolletta)\ **Replies:** 3\ **Last updated:** [1 August 2022 07:56 UTC](https://pyfr.discourse.group/t/simulating-stall-in-2d/660 "2022-08-01T07:56:33Z")
Hello everyone, I and some colleagues of mine are actually studying the cl, cd, and cm coefficients for a public geometry of a helicopter’s rotorcraft blade profile (the so-called SC1095 - the geometry can be downloaded… --- ## [Errors when interpolating](https://pyfr.discourse.group/t/errors-when-interpolating/656)
**Author:** [@Zhenyang](https://pyfr.discourse.group/u/Zhenyang)\ **Replies:** 6\ **Last updated:** [28 July 2022 12:11 UTC](https://pyfr.discourse.group/t/errors-when-interpolating/656 "2022-07-28T12:11:13Z")
Hi Will, Edit: Moved here from this topic: On 2D Lagrange polynomials Related to this topic, I am trying to do interpolation to a field. I called legendre polynomial function in poly.py to construct my polynomial space… --- ## [How can I use EDAC in PyFR when simulating the incompressible problem?](https://pyfr.discourse.group/t/how-can-i-use-edac-in-pyfr-when-simulating-the-incompressible-problem/653)
**Author:** [@luli](https://pyfr.discourse.group/u/luli)\ **Replies:** 6\ **Last updated:** [26 March 2025 15:54 UTC](https://pyfr.discourse.group/t/how-can-i-use-edac-in-pyfr-when-simulating-the-incompressible-problem/653 "2025-03-26T15:54:41Z")
I have read paper \[2111.07915\] Artificial Compressibility Approaches in Flux Reconstruction for Incompressible Viscous Flow Simulations (arxiv.org), and found a method called EDAC are used in PyFR framework, what should… --- ## [Can pyfr write Integrate quantities at set intervals?](https://pyfr.discourse.group/t/can-pyfr-write-integrate-quantities-at-set-intervals/652)
**Author:** [@luli](https://pyfr.discourse.group/u/luli)\ **Replies:** 1\ **Last updated:** [21 July 2022 07:58 UTC](https://pyfr.discourse.group/t/can-pyfr-write-integrate-quantities-at-set-intervals/652 "2022-07-21T07:58:30Z")
I notice that in \[soln-plugin-integrate\] , integrate quantities are calculated every nsteps time steps, while when I use time controller, the time steps are not fixed value. I want to get integrate quantities at set int… --- ## [Pseudostats residual convergence](https://pyfr.discourse.group/t/pseudostats-residual-convergence/645)
**Author:** [@YoonSuKyung](https://pyfr.discourse.group/u/YoonSuKyung)\ **Replies:** 7\ **Last updated:** [21 July 2022 08:00 UTC](https://pyfr.discourse.group/t/pseudostats-residual-convergence/645 "2022-07-21T08:00:50Z")
Hi, I’m running SD7003, Re=60,000 case with 1 gpu(RTX 3080 Ti) using p3 grid. For first 10 sec, i use backward-euler scheme & euler pseudo-scheme in \[solver-time-integrator\] then for 10 to 14 sec, i used sdirk33 schem… --- ## [Is it possible to use FP16 in PyFR or CFD with FR scheme?](https://pyfr.discourse.group/t/is-it-possible-to-use-fp16-in-pyfr-or-cfd-with-fr-scheme/644)
**Author:** [@jingchang\_shi](https://pyfr.discourse.group/u/jingchang_shi)\ **Replies:** 2\ **Last updated:** [14 July 2022 13:37 UTC](https://pyfr.discourse.group/t/is-it-possible-to-use-fp16-in-pyfr-or-cfd-with-fr-scheme/644 "2022-07-14T13:37:21Z")
Hi! I googled the forum and no discussion on using FP16 in PyFR. I just wonder if it is possible to use FP16 in PyFR? Or a general question: Is that possible to use FP16 in CFD? Especially with the FR scheme. I’m not… --- ## [OpenMP backend on non-amd64 architectures](https://pyfr.discourse.group/t/openmp-backend-on-non-amd64-architectures/641)
**Author:** [@Fellshock](https://pyfr.discourse.group/u/Fellshock)\ **Replies:** 1\ **Last updated:** [7 July 2022 12:00 UTC](https://pyfr.discourse.group/t/openmp-backend-on-non-amd64-architectures/641 "2022-07-07T12:00:36Z")
The PyFR v1.14 release notes say that “libxsmm \[was\] made a hard dependency for the OpenMP backend.” Of course, libxsmm is available only for the amd64 architecture. I am regularly using an IBM POWER9 architecture machin… --- ## [Unpaired faces in mesh, help me please](https://pyfr.discourse.group/t/unpaired-faces-in-mesh-help-me-please/638)
**Author:** [@aero\_kang](https://pyfr.discourse.group/u/aero_kang)\ **Replies:** 1\ **Last updated:** [5 July 2022 10:32 UTC](https://pyfr.discourse.group/t/unpaired-faces-in-mesh-help-me-please/638 "2022-07-05T10:32:08Z")
Hi I’m looking to run 3D simulation from Gmsh. I used extruded 2D geometry. I have run 2D geometry before. but 3D mesh get following error. ValueError: Unpaired faces in mesh I read another question about similar pr… --- ## [Runtime error about 2d euler vortex example](https://pyfr.discourse.group/t/runtime-error-about-2d-euler-vortex-example/636)
**Author:** [@YoonSuKyung](https://pyfr.discourse.group/u/YoonSuKyung)\ **Replies:** 3\ **Last updated:** [12 July 2022 07:46 UTC](https://pyfr.discourse.group/t/runtime-error-about-2d-euler-vortex-example/636 "2022-07-12T07:46:01Z")
A few days ago, i update pyfr version (1.13 → 1.14.0) Thereafter the 2D euler vortex example is not executed. ----------------------------error message-------------------- (pyfr\_14) sk@sk:~/pyfr/pyfr\_14/PyFR-1.14.0/ex… --- ## [Parsing error: configparser.ParsingError: Source contains parsing errors: '\'](https://pyfr.discourse.group/t/parsing-error-configparser-parsingerror-source-contains-parsing-errors-string/635)
**Author:** [@nathanbl](https://pyfr.discourse.group/u/nathanbl)\ **Replies:** 2\ **Last updated:** [5 July 2022 06:23 UTC](https://pyfr.discourse.group/t/parsing-error-configparser-parsingerror-source-contains-parsing-errors-string/635 "2022-07-05T06:23:11Z")
I am repeatedly encountering a parsing error, seems to be related to my ini file but the ini file doesn’t seem to have any problems. because I couldn’t upload files I am attaching the text of the error message and the in… --- ## [Request data information for the scaling case](https://pyfr.discourse.group/t/request-data-information-for-the-scaling-case/632)
**Author:** [@Zhenyang](https://pyfr.discourse.group/u/Zhenyang)\ **Replies:** 2\ **Last updated:** [29 June 2022 20:53 UTC](https://pyfr.discourse.group/t/request-data-information-for-the-scaling-case/632 "2022-06-29T20:53:56Z")
Hi, I am not sure if it is appropriate to ask here. I wonder if you have information for this scaling case: T106D low pressure turbine linear cascade or as showed in the picture: We are applying for EuoreHPC project… --- ## [Is pyfr using IMEX scheme?](https://pyfr.discourse.group/t/is-pyfr-using-imex-scheme/631)
**Author:** [@luli](https://pyfr.discourse.group/u/luli)\ **Replies:** 4\ **Last updated:** [30 June 2022 10:18 UTC](https://pyfr.discourse.group/t/is-pyfr-using-imex-scheme/631 "2022-06-30T10:18:51Z")
I read a paper Accelerated implicit-explicit Runge-Kutta schemes for locally stiff systems - ScienceDirect about IMES， is pyfr using IMEX scheme ? --- ## [Loading new initial condition to existing integrator](https://pyfr.discourse.group/t/loading-new-initial-condition-to-existing-integrator/628)
**Author:** [@Fellshock](https://pyfr.discourse.group/u/Fellshock)\ **Replies:** 1\ **Last updated:** [21 June 2022 13:08 UTC](https://pyfr.discourse.group/t/loading-new-initial-condition-to-existing-integrator/628 "2022-06-21T13:08:18Z")
I am writing some custom code to interpolate existing .pyfrs files onto a set of user-defined coordinates defined as a numpy array. I’ve been able to get it to work for a single pyfrs file by using a slightly modified Sa… --- ## [Some questions about implicit LES](https://pyfr.discourse.group/t/some-questions-about-implicit-les/627)
**Author:** [@randommc](https://pyfr.discourse.group/u/randommc)\ **Replies:** 4\ **Last updated:** [22 June 2022 11:44 UTC](https://pyfr.discourse.group/t/some-questions-about-implicit-les/627 "2022-06-22T11:44:07Z")
Hi, everyone I wonder can a DNS code directly be used to perform ILES without any revision. The difference between DNS and ILES is the requirement of mesh resolution from the view of implemention, right? Moreover, does … --- ## [MPI run error with cuda](https://pyfr.discourse.group/t/mpi-run-error-with-cuda/626)
**Author:** [@luli](https://pyfr.discourse.group/u/luli)\ **Replies:** 9\ **Last updated:** [27 June 2022 11:41 UTC](https://pyfr.discourse.group/t/mpi-run-error-with-cuda/626 "2022-06-27T11:41:15Z")
I install pyfr1.14.0 and run examples/euler\_vortex\_2d case with mpi, and I got an error like this : What’s wrong with me ? --- ## [How can I know the DoFs with .pyfrs file](https://pyfr.discourse.group/t/how-can-i-know-the-dofs-with-pyfrs-file/625)
**Author:** [@luli](https://pyfr.discourse.group/u/luli)\ **Replies:** 4\ **Last updated:** [11 October 2023 17:04 UTC](https://pyfr.discourse.group/t/how-can-i-know-the-dofs-with-pyfrs-file/625 "2023-10-11T17:04:18Z")
When I test some unstructured case, when applying high-order scheme, the Dofs are increasing rapidly, how to get the number of degrees of freedom in a simple way? --- ## [ILES model problem?](https://pyfr.discourse.group/t/iles-model-problem/622)
**Author:** [@luli](https://pyfr.discourse.group/u/luli)\ **Replies:** 2\ **Last updated:** [9 June 2022 07:28 UTC](https://pyfr.discourse.group/t/iles-model-problem/622 "2022-06-09T07:28:14Z")
Dear All, How to evaluate this article? " On the physical inadmissibility of ILES for simulations of Euler equation turbulence" \[\[1811.05888\] On the physical inadmissibility of ILES for simulations of Euler equation turb… --- ## [Getting either NaNs or extremely slow convergence](https://pyfr.discourse.group/t/getting-either-nans-or-extremely-slow-convergence/617)
**Author:** [@Fellshock](https://pyfr.discourse.group/u/Fellshock)\ **Replies:** 16\ **Last updated:** [15 June 2022 13:20 UTC](https://pyfr.discourse.group/t/getting-either-nans-or-extremely-slow-convergence/617 "2022-06-15T13:20:34Z")
I’m trying to do LESes of flows past a large number (~100) of different bluff bodies using the ac-navier-stokes solver at around Re=400. My BCs are periodic in the z-direction (the bluff bodies are extruded along the z-d… --- ## [Unable to load xsmm](https://pyfr.discourse.group/t/unable-to-load-xsmm/616)
**Author:** [@Hima](https://pyfr.discourse.group/u/Hima)\ **Replies:** 6\ **Last updated:** [8 June 2022 08:29 UTC](https://pyfr.discourse.group/t/unable-to-load-xsmm/616 "2022-06-08T08:29:29Z")
pyfr run -b openmp -p couette\_flow\_2d.pyfrm couette\_flow\_2d.ini Traceback (most recent call last): File “/home/imanshi/pyFR-env/lib/python3.10/site-packages/pyfr/ctypesutil.py”, line 58, in load\_library return ctypes.… --- ## [Import error while importing gmsh file to pyfrm file](https://pyfr.discourse.group/t/import-error-while-importing-gmsh-file-to-pyfrm-file/614)
**Author:** [@Hima](https://pyfr.discourse.group/u/Hima)\ **Replies:** 1\ **Last updated:** [29 May 2022 13:07 UTC](https://pyfr.discourse.group/t/import-error-while-importing-gmsh-file-to-pyfrm-file/614 "2022-05-29T13:07:17Z")
pyfr import t5.msh ab.pyfrm Traceback (most recent call last): File “/usr/bin/pyfr”, line 11, in load\_entry\_point(‘pyfr==1.5.0’, ‘console\_scripts’, ‘pyfr’)() File “/usr/lib/python3/dist-packages/pkg\_resources/init.p… --- ## [Coarse mesh for TGV at Re=1600](https://pyfr.discourse.group/t/coarse-mesh-for-tgv-at-re-1600/611)
**Author:** [@randommc](https://pyfr.discourse.group/u/randommc)\ **Replies:** 1\ **Last updated:** [28 May 2022 17:07 UTC](https://pyfr.discourse.group/t/coarse-mesh-for-tgv-at-re-1600/611 "2022-05-28T17:07:09Z")
Hi, everyone! When I use p7 FR-DG scheme to simulate TGV at Ma=0.1 with a 16^3 mesh, it diverge due to the aliasing error as mentioned in Ref (Bull J R, Jameson A. Simulation of the Taylor–Green vortex using high-order … --- ## [Sampling pyfrs files at certain coordinates](https://pyfr.discourse.group/t/sampling-pyfrs-files-at-certain-coordinates/606)
**Author:** [@Fellshock](https://pyfr.discourse.group/u/Fellshock)\ **Replies:** 4\ **Last updated:** [21 May 2022 17:05 UTC](https://pyfr.discourse.group/t/sampling-pyfrs-files-at-certain-coordinates/606 "2022-05-21T17:05:33Z")
Does PyFR have a utility, or some other recommended way, to sample .pyfrs files at certain locations within the solution domain? I am aware that solution-plugin-sampler exists, but I do not necessarily know the exact loc… --- ## [About Non-dimensionalization](https://pyfr.discourse.group/t/about-non-dimensionalization/601)
**Author:** [@Zhenyang](https://pyfr.discourse.group/u/Zhenyang)\ **Replies:** 3\ **Last updated:** [11 May 2022 09:37 UTC](https://pyfr.discourse.group/t/about-non-dimensionalization/601 "2022-05-11T09:37:35Z")
Hi all, I have this question for quite a long time. I want to know more about how the code deal with non-dimensional values. The non-dimensional compressible NS should have a Reynolds number appear in the viscous term. … --- ## [Compressible Navier--Stokes for incompressible cases](https://pyfr.discourse.group/t/compressible-navier-stokes-for-incompressible-cases/600)
**Author:** [@randommc](https://pyfr.discourse.group/u/randommc)\ **Replies:** 3\ **Last updated:** [9 May 2022 08:15 UTC](https://pyfr.discourse.group/t/compressible-navier-stokes-for-incompressible-cases/600 "2022-05-09T08:15:26Z")
Thank you very much. I have another question. I want to simulate TGV at Re=1600, Ma=0.08. Can compressible N-S solver be used to simulate incompressible problems directly without ACM? --- ## [Internal zeros for the OFR scheme](https://pyfr.discourse.group/t/internal-zeros-for-the-ofr-scheme/597)
**Author:** [@randommc](https://pyfr.discourse.group/u/randommc)\ **Replies:** 1\ **Last updated:** [6 May 2022 07:36 UTC](https://pyfr.discourse.group/t/internal-zeros-for-the-ofr-scheme/597 "2022-05-06T07:36:29Z")
Hi, everyone I want to change the correction function to Optimal General FR Schemes (DOI 10.1007/s10915-014-9882-5, Asthana K and Jameson A, High-Order Flux Reconstruction Schemes with Minimal Dispersion and Dissipation… --- ## [Function in pyfr](https://pyfr.discourse.group/t/function-in-pyfr/593)
**Author:** [@fei](https://pyfr.discourse.group/u/fei)\ **Replies:** 11\ **Last updated:** [10 May 2022 02:18 UTC](https://pyfr.discourse.group/t/function-in-pyfr/593 "2022-05-10T02:18:52Z")
Hello, I know square root is sqrt(). Can I use function such like triple root in ini. file? I use pow(x, 1/3), it is wrong. Thanks --- ## [Couette flow in lierature](https://pyfr.discourse.group/t/couette-flow-in-lierature/591)
**Author:** [@fei](https://pyfr.discourse.group/u/fei)\ **Replies:** 38\ **Last updated:** [16 May 2022 12:37 UTC](https://pyfr.discourse.group/t/couette-flow-in-lierature/591 "2022-05-16T12:37:22Z")
Hello everyone, I want to reproduce the results of couette case in the paper, PyFR: An open source framework for solving advection-diffusion type problems on streaming architectures using the flux reconstruction approac… --- ## [Assigning each CPU with a GPU](https://pyfr.discourse.group/t/assigning-each-cpu-with-a-gpu/584)
**Author:** [@Zhenyang](https://pyfr.discourse.group/u/Zhenyang)\ **Replies:** 5\ **Last updated:** [13 April 2022 20:17 UTC](https://pyfr.discourse.group/t/assigning-each-cpu-with-a-gpu/584 "2022-04-13T20:17:15Z")
Hi, I am running PyFR on CUDA backend. My cluster has 8 A100 GPUs and two CPUs each node (8 numa nodes). What I want to do is to assign each CPU core with its own GPU to reach the best performance (I have tried to run i… --- ## [Temperature and Specific Heat](https://pyfr.discourse.group/t/temperature-and-specific-heat/578)
**Author:** [@FedericoCipolletta](https://pyfr.discourse.group/u/FedericoCipolletta)\ **Replies:** 3\ **Last updated:** [25 March 2022 08:25 UTC](https://pyfr.discourse.group/t/temperature-and-specific-heat/578 "2022-03-25T08:25:22Z")
Hello everyone, I am working with the PyFR and need to understand how to set values in the config file that might have physical relevance. In particular, I am looking at the paper Iyer et al (2021) and I am adopting the… [Previous page](https://pyfr.discourse.group/c/general/9.md?page=1) [Next page](https://pyfr.discourse.group/c/general/9.md?page=3)