# Latest **URL:** https://bempp.discourse.group/latest.md [Latest](https://bempp.discourse.group/latest.md) · [Categories](https://bempp.discourse.group/categories.md) --- ## [OPENCL with AMD EPYC CPU](https://bempp.discourse.group/t/opencl-with-amd-epyc-cpu/358)
**Author:** [@Bastos](https://bempp.discourse.group/u/Bastos)\ **Replies:** 0\ **Last updated:** [11 June 2026 09:27 UTC](https://bempp.discourse.group/t/opencl-with-amd-epyc-cpu/358 "2026-06-11T09:27:46Z")
Hello everyone, I am currently trying to calculate some magnetic flux with a refined mesh. Therefore, I am using opencl. The thing is that I am now using an AMD CPU (EPYC 96 core). As I am not really used to AMD stuff, … --- ## [I am the new guy I am the new guy](https://bempp.discourse.group/t/i-am-the-new-guy-i-am-the-new-guy/357)
**Author:** [@Milla36P497120](https://bempp.discourse.group/u/Milla36P497120)\ **Replies:** 0\ **Last updated:** [7 June 2026 01:52 UTC](https://bempp.discourse.group/t/i-am-the-new-guy-i-am-the-new-guy/357 "2026-06-07T01:52:01Z")
Amazing quite a lot of terrific info. vpn для роутера vless --- ## [Calculating surface currents](https://bempp.discourse.group/t/calculating-surface-currents/352)
**Author:** [@DivConforming](https://bempp.discourse.group/u/DivConforming)\ **Replies:** 0\ **Last updated:** [25 March 2026 03:31 UTC](https://bempp.discourse.group/t/calculating-surface-currents/352 "2026-03-25T03:31:04Z")
Hello, I am new to bempp. For the tutorial “Electromagnetic scattering from flat screens” (link below), is there a way for bempp to output the surface currents (or equivalently the coefficients of the solution vector alo… --- ## [How to import grid with results](https://bempp.discourse.group/t/how-to-import-grid-with-results/347)
**Author:** [@S.L](https://bempp.discourse.group/u/S.L)\ **Replies:** 1\ **Last updated:** [6 March 2026 12:41 UTC](https://bempp.discourse.group/t/how-to-import-grid-with-results/347 "2026-03-06T12:41:12Z")
Thank you for the Bempp discussion platform! I have encountered the following issues and would like to discuss them with everyone. My question is Can Bempp import grids with result data? I would like to skip the proces… --- ## [GridFunction: boundary dof evaluation for 2D mesh](https://bempp.discourse.group/t/gridfunction-boundary-dof-evaluation-for-2d-mesh/348)
**Author:** [@EDE](https://bempp.discourse.group/u/EDE)\ **Replies:** 1\ **Last updated:** [1 March 2026 13:48 UTC](https://bempp.discourse.group/t/gridfunction-boundary-dof-evaluation-for-2d-mesh/348 "2026-03-01T13:48:06Z")
Dear Bempp community, I am observing a strange behaviour when using the GridFunction method to project a function onto a 2D mesh. In the example below, I project the same function onto a 2D square mesh and onto a 3D cu… --- ## [Unused U\_cone Variable in BEMPP Loudspeaker Tutorial](https://bempp.discourse.group/t/unused-u-cone-variable-in-bempp-loudspeaker-tutorial/293)
**Author:** [@Kevin](https://bempp.discourse.group/u/Kevin)\ **Replies:** 2\ **Last updated:** [13 January 2026 17:17 UTC](https://bempp.discourse.group/t/unused-u-cone-variable-in-bempp-loudspeaker-tutorial/293 "2026-01-13T17:17:49Z")
Hi everyone, I have a question about the loudspeaker tutorial in the bempp-acoustic-tutorials by mscroggs. In the code, U\_cone is defined as follows: U\_cone = 0.001 # Amplitude of the time-harmonic velocity of the co… --- ## [How to import a mesh from NETGEN](https://bempp.discourse.group/t/how-to-import-a-mesh-from-netgen/350)
**Author:** [@Bastos](https://bempp.discourse.group/u/Bastos)\ **Replies:** 0\ **Last updated:** [2 December 2025 23:22 UTC](https://bempp.discourse.group/t/how-to-import-a-mesh-from-netgen/350 "2025-12-02T23:22:03Z")
Hello to the BEMPP community, I am trying to make BEM calculations for a classic Laplace problem with an electrostatic lens that I meshed with NETGEN (NgSolve). In a previous project, I used BEMPP with a mesh generated … --- ## [Dolfinx + BEMpp in parallel](https://bempp.discourse.group/t/dolfinx-bempp-in-parallel/349)
**Author:** [@a-lyrae](https://bempp.discourse.group/u/a-lyrae)\ **Replies:** 0\ **Last updated:** [21 November 2025 14:33 UTC](https://bempp.discourse.group/t/dolfinx-bempp-in-parallel/349 "2025-11-21T14:33:11Z")
Hi all, I would like to use dolfinx+bempp to solve a magnetostatic problem, which has a boundary condition: phi1\_boundary=BEM\*phi0\_boundary. I create a distributed mesh with dolfinx and would like to use bempp to handle… --- ## [The 'nan' issue occurs when solving in Bempp 3.3.4](https://bempp.discourse.group/t/the-nan-issue-occurs-when-solving-in-bempp-3-3-4/346)
**Author:** [@Shelton](https://bempp.discourse.group/u/Shelton)\ **Replies:** 0\ **Last updated:** [6 November 2025 06:08 UTC](https://bempp.discourse.group/t/the-nan-issue-occurs-when-solving-in-bempp-3-3-4/346 "2025-11-06T06:08:14Z")
Hello everyone, When using version Bempp3.3.4 to solve the scattering field of a cube, I encountered ‘nan’ values in the computed scattered electric field on the surface. However, when running the following code multipl… --- ## [Problems of Electromagnetic Scattering Simulation in Mapping RCS](https://bempp.discourse.group/t/problems-of-electromagnetic-scattering-simulation-in-mapping-rcs/343)
**Author:** [@Shelton](https://bempp.discourse.group/u/Shelton)\ **Replies:** 2\ **Last updated:** [28 October 2025 17:39 UTC](https://bempp.discourse.group/t/problems-of-electromagnetic-scattering-simulation-in-mapping-rcs/343 "2025-10-28T17:39:55Z")
Hello everyone, I am using the Method of Moments (MoM) to study the electromagnetic scattering of PEC metal spheres. I found that when the direction of my plane wave propagation is (0,0,-1) and the polarization direction… --- ## [Methods for singularity treatment in Bempp？](https://bempp.discourse.group/t/methods-for-singularity-treatment-in-bempp/345)
**Author:** [@Jake](https://bempp.discourse.group/u/Jake)\ **Replies:** 0\ **Last updated:** [20 October 2025 12:57 UTC](https://bempp.discourse.group/t/methods-for-singularity-treatment-in-bempp/345 "2025-10-20T12:57:26Z")
Dear Bempp users, I am a graduate student specializing in boundary integral equations. While reading the Bempp book, I found that the explanation regarding the treatment of singularities in boundary integral operators i… --- ## [Challenges Encountered When Implementing Relevant Literature Methods Using BEMPP](https://bempp.discourse.group/t/challenges-encountered-when-implementing-relevant-literature-methods-using-bempp/344)
**Author:** [@Duke](https://bempp.discourse.group/u/Duke)\ **Replies:** 0\ **Last updated:** [12 October 2025 05:48 UTC](https://bempp.discourse.group/t/challenges-encountered-when-implementing-relevant-literature-methods-using-bempp/344 "2025-10-12T05:48:04Z")
Hello everyone! I have read most of the relevant articles on BEMPP and noticed that Matthew’s doctoral thesis provides a detailed description of BEMPP. However, when I try to implement the direct EFIE, indirect EFIE, MF… --- ## [Importing a 2D mesh from FEniCSx](https://bempp.discourse.group/t/importing-a-2d-mesh-from-fenicsx/335)
**Author:** [@EDE](https://bempp.discourse.group/u/EDE)\ **Replies:** 1\ **Last updated:** [15 September 2025 12:20 UTC](https://bempp.discourse.group/t/importing-a-2d-mesh-from-fenicsx/335 "2025-09-15T12:20:42Z")
Dear Bempp users, I am trying to implement a vibroacoustics FEM-BEM coupled model using FEniCSx and Bempp. The model is simplified to a box with only one surface vibrates to produce sound into the exterior (the rest is… --- ## [Error in example scripts](https://bempp.discourse.group/t/error-in-example-scripts/341)
**Author:** [@alanlindsay](https://bempp.discourse.group/u/alanlindsay)\ **Replies:** 2\ **Last updated:** [15 September 2025 11:56 UTC](https://bempp.discourse.group/t/error-in-example-scripts/341 "2025-09-15T11:56:15Z")
Hi there, I’m trying to familiarize myself with bempp by running the example scripts. I’m getting the following error related to the gmres solver: For example, when executing line 72 of the reentrant cube capacitance e… --- ## [Plans for H-matrices in Bempp-cl?](https://bempp.discourse.group/t/plans-for-h-matrices-in-bempp-cl/340)
**Author:** [@Mk2020](https://bempp.discourse.group/u/Mk2020)\ **Replies:** 0\ **Last updated:** [5 September 2025 14:14 UTC](https://bempp.discourse.group/t/plans-for-h-matrices-in-bempp-cl/340 "2025-09-05T14:14:23Z")
Hi everyone, I am currently exploring the use of Bempp-cl for thin shell simulations, where the BEM part of the computation requires considerable resources. In the legacy Bem++, hierarchical matrices were available. I a… --- ## [Extracting the interaction matrix (or) the Green's Functions from the MoM solution](https://bempp.discourse.group/t/extracting-the-interaction-matrix-or-the-greens-functions-from-the-mom-solution/339)
**Author:** [@rohi21](https://bempp.discourse.group/u/rohi21)\ **Replies:** 1\ **Last updated:** [25 July 2025 14:32 UTC](https://bempp.discourse.group/t/extracting-the-interaction-matrix-or-the-greens-functions-from-the-mom-solution/339 "2025-07-25T14:32:17Z")
Hello, I’m an undergraduate student trying to further my understanding of MoM and numerical electromagnetics and I would like to manipulate the underlying interaction matrix of structures I’m simulating in bempp to take… --- ## [Installing bempp on Apple M1 silicon](https://bempp.discourse.group/t/installing-bempp-on-apple-m1-silicon/333)
**Author:** [@bmitra](https://bempp.discourse.group/u/bmitra)\ **Replies:** 2\ **Last updated:** [30 May 2025 14:04 UTC](https://bempp.discourse.group/t/installing-bempp-on-apple-m1-silicon/333 "2025-05-30T14:04:06Z")
I am unable to install via anaconda: This is the error that I get. On conda-forge they only have osx-64 channel. No osx-arm64 channel. Has anyone installed bempp on apple silicon ? “”" Platform: osx-arm64 Collecting p… --- ## [MPI parallelization of coupled FEniCSx–Bempp FEM/BEM problem](https://bempp.discourse.group/t/mpi-parallelization-of-coupled-fenicsx-bempp-fem-bem-problem/330)
**Author:** [@Mk2020](https://bempp.discourse.group/u/Mk2020)\ **Replies:** 1\ **Last updated:** [27 May 2025 10:41 UTC](https://bempp.discourse.group/t/mpi-parallelization-of-coupled-fenicsx-bempp-fem-bem-problem/330 "2025-05-27T10:41:42Z")
Hi everyone. I’m using FEniCSx in combination with Bempp to solve a problem that couples FEM and BEM. I would like to know if it’s possible to run both parts in parallel using MPI, and if so, how to manage the communicat… --- ## [How to use bempp if the surface has dielectric and perfect conducted parts](https://bempp.discourse.group/t/how-to-use-bempp-if-the-surface-has-dielectric-and-perfect-conducted-parts/53)
**Author:** [@Mix](https://bempp.discourse.group/u/Mix)\ **Replies:** 2\ **Last updated:** [15 May 2025 09:21 UTC](https://bempp.discourse.group/t/how-to-use-bempp-if-the-surface-has-dielectric-and-perfect-conducted-parts/53 "2025-05-15T09:21:08Z")
Hello everyone! I saw the example when bem++ is used for two dielectric spheres. But if I have the perfectly conducted sphere and it has a layer of dielectric, how to solve this in bem++? Could you please help and provi… --- ## [How to calculate the RCS of 2D target?](https://bempp.discourse.group/t/how-to-calculate-the-rcs-of-2d-target/325)
**Author:** [@MushishiYako](https://bempp.discourse.group/u/MushishiYako)\ **Replies:** 2\ **Last updated:** [30 April 2025 09:22 UTC](https://bempp.discourse.group/t/how-to-calculate-the-rcs-of-2d-target/325 "2025-04-30T09:22:10Z")
Hello there! My problem discribed with the help of deepseek is as follow: To compare the differences in the radar cross section (RCS) of 2D targets calculated using the Finite Element Method (FEM) and the Method of Mom… --- ## [Can't get examples from paper Solving Boundary Integral Problems with BEM++](https://bempp.discourse.group/t/cant-get-examples-from-paper-solving-boundary-integral-problems-with-bem/259)
**Author:** [@AnthonyTSV](https://bempp.discourse.group/u/AnthonyTSV)\ **Replies:** 5\ **Last updated:** [21 March 2025 15:49 UTC](https://bempp.discourse.group/t/cant-get-examples-from-paper-solving-boundary-integral-problems-with-bem/259 "2025-03-21T15:49:46Z")
Hello there! For my bachelor’s, I was trying to find examples of simulating different antennas using bempp or bem++. I found that code examples presented in the following paper Solving Boundary Integral Problems with BE… --- ## [Normals not oriented in Fem-Bem coupling tutorial](https://bempp.discourse.group/t/normals-not-oriented-in-fem-bem-coupling-tutorial/300)
**Author:** [@mknoeller](https://bempp.discourse.group/u/mknoeller)\ **Replies:** 5\ **Last updated:** [20 March 2025 16:11 UTC](https://bempp.discourse.group/t/normals-not-oriented-in-fem-bem-coupling-tutorial/300 "2025-03-20T16:11:51Z")
Dear Bempp team and community, (accidentally I deleted my last post when I wanted to add something) when running the tutorial for the Fem-Bem coupling “Simple FEM-BEM coupling for the Helmholtz equation with FEniCSx” I… --- ## [\[announcement\] import bempp\_cl.api](https://bempp.discourse.group/t/announcement-import-bempp-cl-api/317)
**Author:** [@mscroggs](https://bempp.discourse.group/u/mscroggs)\ **Replies:** 0\ **Last updated:** [20 March 2025 16:09 UTC](https://bempp.discourse.group/t/announcement-import-bempp-cl-api/317 "2025-03-20T16:09:26Z")
Hello everyone, I’ve just merged a PR that renames the Python module in bempp-cl from bempp to bempp\_cl. The reason for this is so that bempp-cl can be more easily used alongside (the still very experimental) bempp-rs. … --- ## [Ground modelling](https://bempp.discourse.group/t/ground-modelling/316)
**Author:** [@Steve](https://bempp.discourse.group/u/Steve)\ **Replies:** 0\ **Last updated:** [16 March 2025 21:54 UTC](https://bempp.discourse.group/t/ground-modelling/316 "2025-03-16T21:54:23Z")
Hi there, I need to model the scattering from structures near a ground seen as a PEC plane. I know that BEMPP only has functionality for free space Green’s functions and that half-space models are not currently support… --- ## [Bistatic RCS generated by dielectric cubes](https://bempp.discourse.group/t/bistatic-rcs-generated-by-dielectric-cubes/297)
**Author:** [@pescapil](https://bempp.discourse.group/u/pescapil)\ **Replies:** 1\ **Last updated:** [4 March 2025 07:52 UTC](https://bempp.discourse.group/t/bistatic-rcs-generated-by-dielectric-cubes/297 "2025-03-04T07:52:54Z")
Hi, I was reproducing the tutorial for dielectric spheres with bempp-cl v0.3.2 but this time I applied it to cubes: sphere0 = bempp.api.shapes.cube(length = 0.4, origin=(-1.0, 0, 0), h=0.2) sphere1 = bempp.api.shapes.cu… --- ## [Bempp for electromagnetic wave transportation question](https://bempp.discourse.group/t/bempp-for-electromagnetic-wave-transportation-question/304)
**Author:** [@Liang](https://bempp.discourse.group/u/Liang)\ **Replies:** 0\ **Last updated:** [20 January 2025 14:25 UTC](https://bempp.discourse.group/t/bempp-for-electromagnetic-wave-transportation-question/304 "2025-01-20T14:25:13Z")
Hello. I saw many examples of using Bempp to calculate the EM scattering problems. I wonder if Bempp can also be used to calculate the EM wave propagating in a waveguide structure. In this case, how I can excite a proper… --- ## [Invert DL matrix in single step to compute full surface impedance matrix](https://bempp.discourse.group/t/invert-dl-matrix-in-single-step-to-compute-full-surface-impedance-matrix/302)
**Author:** [@hambricacoustics](https://bempp.discourse.group/u/hambricacoustics)\ **Replies:** 4\ **Last updated:** [18 December 2024 12:35 UTC](https://bempp.discourse.group/t/invert-dl-matrix-in-single-step-to-compute-full-surface-impedance-matrix/302 "2024-12-18T12:35:30Z")
Hi, I am exploring the use of BEMPP for computing surface impedance matrices \[Z\] (an NxN matrix of columns of surface pressures induced by individual velocity sources). This requires inverting the DL operator matrix. A… --- ## [Applying Complex Velocity Components in Scalar Function Space for Helmholtz Equation](https://bempp.discourse.group/t/applying-complex-velocity-components-in-scalar-function-space-for-helmholtz-equation/298)
**Author:** [@Kevin](https://bempp.discourse.group/u/Kevin)\ **Replies:** 5\ **Last updated:** [25 November 2024 21:13 UTC](https://bempp.discourse.group/t/applying-complex-velocity-components-in-scalar-function-space-for-helmholtz-equation/298 "2024-11-25T21:13:51Z")
Hello Bempp Community, I am working on a problem involving the calculation of sound pressure using the Helmholtz equation and have complex Normal velocity components (X, Y, Z) for each node in my mesh. According to the … --- ## [Using BEMPP to Calculate Far-Field Sound Pressure Around a Hollow Cube with Imported Surface Velocities](https://bempp.discourse.group/t/using-bempp-to-calculate-far-field-sound-pressure-around-a-hollow-cube-with-imported-surface-velocities/289)
**Author:** [@Kevin](https://bempp.discourse.group/u/Kevin)\ **Replies:** 14\ **Last updated:** [24 November 2024 20:06 UTC](https://bempp.discourse.group/t/using-bempp-to-calculate-far-field-sound-pressure-around-a-hollow-cube-with-imported-surface-velocities/289 "2024-11-24T20:06:04Z")
Hello Everone, I’m working on a student project where I need to use BEMPP to calculate the sound pressure in the far-field around a hollow cube. The cube is excited by a steady-state load, and I’ve conducted a mode-base… --- ## [Slow convergence of GMRES with FMM assembler](https://bempp.discourse.group/t/slow-convergence-of-gmres-with-fmm-assembler/286)
**Author:** [@Sid](https://bempp.discourse.group/u/Sid)\ **Replies:** 3\ **Last updated:** [16 November 2024 13:03 UTC](https://bempp.discourse.group/t/slow-convergence-of-gmres-with-fmm-assembler/286 "2024-11-16T13:03:02Z")
Dear Bempp Community, Thank you for this great package. I am simulating sound radiation from a vibrating structure with around 120,000 elements using the Numba-only Docker image. To accelerate the computation and avoid… [Next page](https://bempp.discourse.group/latest.md?page=1)