- firedrake - imperial.ac.uk

Webinar: How to Build Boundary Layers and Hybrid Meshes in Coreform Cubit
by Kimberly White 21 Oct '25

21 Oct '25

Free webinar for CFD users shows how to build hex-to-tet meshes and boundary layers in Coreform Cubit 𝗛𝗼𝘄 𝘁𝗼 𝗕𝘂𝗶𝗹𝗱 𝗕𝗼𝘂𝗻𝗱𝗮𝗿𝘆 𝗟𝗮𝘆𝗲𝗿𝘀 𝗮𝗻𝗱 𝗛𝘆𝗯𝗿𝗶𝗱 𝗠𝗲𝘀𝗵𝗲𝘀 𝗶𝗻 𝗖𝗼𝗿𝗲𝗳𝗼𝗿𝗺 𝗖𝘂𝗯𝗶𝘁 Free webinar October 30th 2025 9 am Mountain Time Hi Firedrake FEM, Join us for a live webinar, How to Build Boundary Layers and Hybrid Meshes in Coreform Cubit. Aimed at CFD users who are familiar with other meshing tools and want to see how Coreform Cubit compares for high-quality boundary layers. This webinar will demonstrate how to define, modify, and refine boundary layers, control layer parameters, and create smooth hex-to-tet transitions using pyramids. Register now to attend the live session with the chance to ask questions in real time. Take me to the registration page (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWZV1r2KdvwRN7mWYJKGSYhR… ) Previous webinars Introduction to the Calculix plugin (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWZV1r2KdvwRN7mWYJKGSYhR… ) In this webinar, led by Norbert Hofbauer, you will learn how to use the Calculix plugin with Coreform Cubit. python.webinar-1 (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWZV1r2KdvwRN7mWYJKGSYhR… ) Your first 15 minutes with Coreform Cubit (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWZV1r2KdvwRN7mWYJKGSYhR… ) In this webinar, Greg Vernon walks through the basics of Coreform Cubit, with an eye toward setting yourself up for long-term success with best practices. View all previous webinars (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWZV1r2KdvwRN7mWYJKGSYhR… ) Coreform Inc., 1427 South 550 East, OREM, UT 84097, 801-717-2296 Unsubscribe (https://email.coreform.com/hs/preferences-center/en/direct?data=W2nWGVW47zk… ) Manage preferences (https://email.coreform.com/hs/preferences-center/en/page?data=W2nWGVW47zkgc… )

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Late-night chats just got interesting 🌙
by jennifferlo6o＠hotmail.com 18 Oct '25

18 Oct '25

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Webinar: 𝗛𝗼𝘄 𝘁𝗼 𝗕𝘂𝗶𝗹𝗱 𝗕𝗼𝘂𝗻𝗱𝗮𝗿𝘆 𝗟𝗮𝘆𝗲𝗿𝘀 𝗮𝗻𝗱 𝗛𝘆𝗯𝗿𝗶𝗱 𝗠𝗲𝘀𝗵𝗲𝘀 𝗶𝗻 𝗖𝗼𝗿𝗲𝗳𝗼𝗿𝗺 𝗖𝘂𝗯𝗶𝘁
by Kimberly White 14 Oct '25

14 Oct '25

Free webinar for CFD users shows how to build hex-to-tet meshes and boundary layers in Coreform Cubit 𝗛𝗼𝘄 𝘁𝗼 𝗕𝘂𝗶𝗹𝗱 𝗕𝗼𝘂𝗻𝗱𝗮𝗿𝘆 𝗟𝗮𝘆𝗲𝗿𝘀 𝗮𝗻𝗱 𝗛𝘆𝗯𝗿𝗶𝗱 𝗠𝗲𝘀𝗵𝗲𝘀 𝗶𝗻 𝗖𝗼𝗿𝗲𝗳𝗼𝗿𝗺 𝗖𝘂𝗯𝗶𝘁 Free webinar (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWHrVQ4w87pRW5fqXwR3VzkC… ) October 30th 2025 9 am Mountain Time Hi Firedrake FEM, Boundary layers are critical for accurately capturing steep gradients near walls and interfaces in CFD and multiphysics simulations. Join us for a live webinar on How to Build Boundary Layers and Hybrid Meshes in Coreform Cubit, where we will demonstrate how to define, modify, and refine boundary layers, control layer parameters, and create smooth hex-to-tet transitions using pyramids. This session will be especially useful for CFD users who are familiar with other meshing tools and want to see how Coreform Cubit enables efficient, high-quality boundary layer workflows. Register now to attend the live session with the chance to ask questions in real time. Take me to the registration page (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWHrVQ4w87pRW5fqXwR3VzkC… ) Previous webinars Introduction to the Calculix plugin (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWHrVQ4w87pRW5fqXwR3VzkC… ) In this webinar, led by Norbert Hofbauer, you will learn how to use the Calculix plugin with Coreform Cubit. python.webinar-1 (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWHrVQ4w87pRW5fqXwR3VzkC… ) Your first 15 minutes with Coreform Cubit (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWHrVQ4w87pRW5fqXwR3VzkC… ) In this webinar, Greg Vernon walks through the basics of Coreform Cubit, with an eye toward setting yourself up for long-term success with best practices. View all previous webinars (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWHrVQ4w87pRW5fqXwR3VzkC… ) Coreform Inc., 1427 South 550 East, OREM, UT 84097, 801-717-2296 Unsubscribe (https://email.coreform.com/hs/preferences-center/en/direct?data=W2nWGVW47zk… ) Manage preferences (https://email.coreform.com/hs/preferences-center/en/page?data=W2nWGVW47zk9N… )

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github issues solver for firedrake
by Akhil Kammila 06 Oct '25

06 Oct '25

Hey! Noticed firedrake has over 360 issues + prs I'm trying to find the best coding agent, so I'm giving free Claude Code, Codex, etc. for open-source repos' GitHub issues at codearena.com https://codearena.com/. Lmk if you're interested! Akhil Kammila 603-930-1612 akhilkammila(a)gmail.com

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Free webinar: Advanced CalculiX meshing with Coreform Cubit
by Kimberly White 29 Sep '25

29 Sep '25

Learn how to use Coreform Cubit in a Calculix workflow Boosting Calculix with Better Meshes: An Advanced Workflow with Coreform Cubit Join the free webinar (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWqm2p6fHD4BW5Q2y5Z6JBty… ) October 2nd 2025 10 am Mountain Time better-image (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWqm2p6fHD4BW5Q2y5Z6JBty… ) Hi Firedrake FEM, You are invited to join us for a free webinar showcasing our Calculix plugin. We will demonstrate how Calculix users can dramatically improve simulation results by using Coreform Cubit in place of open source meshing tools. Coreform Cubit generates high-quality hex meshes with control over element type, sizing, transitions, and refinement - capabilities that are often missing in open-source meshers. The plug-in bridges the two tools, making it easy to harness Cubit's strengths while continuing to use Calculix as your solver. Join us on Thursday, October 2, at 10:00 a.m. Mountain Time for a live webinar (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWqm2p6fHD4BW5Q2y5Z6JBty… ) sponsored by Coreform and hosted by Norbert Hofbauer. This session will demonstrate a practical end-to-end workflow that combines: - Coreform Cubit for advanced meshing - a Coreform Cubit plug-in developed by Norbert Hofbauer for seamless export to Calculix - Calculix, a powerful open-source finite element solver Whether you're already using Calculix or exploring new simulation workflows, this webinar will provide practical insights and a clear demonstration of how Coreform Cubit can upgrade your simulation pipeline. Take me to the registration page (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWqm2p6fHD4BW5Q2y5Z6JBty… ) Previous webinars Introduction to Python scripting in Coreform Cubit (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWqm2p6fHD4BW5Q2y5Z6JBty… ) In this webinar, led by Norbert Hofbauer, you will learn how to harness the power of Python scripting and the Python API in Coreform Cubit. python.webinar-1 (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWqm2p6fHD4BW5Q2y5Z6JBty… ) Your first 15 minutes with Coreform Cubit (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWqm2p6fHD4BW5Q2y5Z6JBty… ) In this webinar, Greg Vernon walks through the basics of Coreform Cubit, with an eye toward setting yourself up for long-term success with best practices. View all previous webinars (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWqm2p6fHD4BW5Q2y5Z6JBty… ) Coreform Inc., 1427 South 550 East, OREM, UT 84097, 801-717-2296 Unsubscribe (https://email.coreform.com/hs/preferences-center/en/direct?data=W2nWGVW47zk… ) Manage preferences (https://email.coreform.com/hs/preferences-center/en/page?data=W2nWGVW47zkgD… )

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Boosting Calculix with Better Meshes: An Advanced Workflow with Coreform Cubit
by Kimberly White 24 Sep '25

24 Sep '25

Free webinar demonstrates a Coreform Cubit to Calculix workflow Boosting Calculix with Better Meshes: An Advanced Workflow with Coreform Cubit Free webinar (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW-TVX6t7XYJN2kFfbgyjF89… ) October 2nd 2025 10 am Mountain Time Hi Firedrake FEM, Mesh generation is often the weak link in open-source simulation workflows. In this webinar, Norbert Hofbauer demonstrates how a custom Coreform Cubit plugin bridges the gap to Calculix, allowing engineers to use world-class meshing with open-source solvers. Join us on Thursday, October 2, at 10:00 a.m. Mountain Time for a live webinar (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW-TVX6t7XYJN2kFfbgyjF89… ) sponsored by Coreform and hosted by Norbert Hofbauer. This session will demonstrate a practical end-to-end workflow that combines: - Coreform Cubit for advanced meshing - a Coreform Cubit plug-in developed by Norbert Hofbauer for seamless export to Calculix - Calculix, a powerful open-source finite element solver This webinar will show how Calculix users can dramatically improve simulation results by using Cubit to generate high-quality hex meshes with control over element type, sizing, transitions, and refinement, capabilities that are often missing in open-source meshers. The plug-in bridges the two tools, making it easy to harness Cubit's strengths while continuing to use Calculix as your solver. Whether you're already using Calculix or exploring new simulation workflows, this webinar will provide practical insights and a clear demonstration of how Coreform Cubit can upgrade your simulation pipeline. Take me to the registration page (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW-TVX6t7XYJN2kFfbgyjF89… ) Previous webinars Introduction to Python scripting in Coreform Cubit (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW-TVX6t7XYJN2kFfbgyjF89… ) In this webinar, led by Norbert Hofbauer, you will learn how to harness the power of Python scripting and the Python API in Coreform Cubit. python.webinar-1 (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW-TVX6t7XYJN2kFfbgyjF89… ) Your first 15 minutes with Coreform Cubit (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW-TVX6t7XYJN2kFfbgyjF89… ) In this webinar, Greg Vernon walks through the basics of Coreform Cubit, with an eye toward setting yourself up for long-term success with best practices. View all previous webinars (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW-TVX6t7XYJN2kFfbgyjF89… ) Coreform Inc., 1427 South 550 East, OREM, UT 84097, 801-717-2296 Unsubscribe (https://email.coreform.com/hs/preferences-center/en/direct?data=W2nWGVW47zj… ) Manage preferences (https://email.coreform.com/hs/preferences-center/en/page?data=W2nWGVW47zj_c… )

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Anticipating Horizon Europe 2026–2027
by European Fund Management Consulting 09 Sep '25

09 Sep '25

Voir la version en ligne http://xg0yo.mjt.lu/nl3/1fNY_EkBwCw6Vnl4ufdMUQ?m=AVMAAHp0d7IAAAAYlQ4AAKl9Bo… [https://xg0yo.mjt.lu/img2/xg0yo/44103490-8445-472a-89a6-e66ff95684df/content] [https://xg0yo.mjt.lu/img2/xg0yo/c1f194e0-1a2b-4608-816a-da340665c338/content] Anticipating Horizon Europe 2026–2027 : an opportunity to seize right now The next Horizon Europe work programme (2026–2027) is still under discussion in the programme committees… but major novelty: the European Commission is progressively publishing the intermediate versions (drafts) on the transparency register. Even if these documents are not final and will continue to evolve until their official publication at the end of 2025, they already constitute a valuable resource. Why? Because they allow research and innovation stakeholders to prepare their participation in advance, identify priorities, and anticipate future calls. For universities, companies, and research centres, this is the opportunity to gain a head start and build solid partnerships before the official opening of the calls. https://urls.fr/iyhRYI [https://horizoneuropencpportal.eu/news/draft-work-programmes-2026-2027-now-…] And to complete this journey in a relevant way: contact our teams to build it and train yourself as closely as possible to your needs : https://efmc.eu/training/ -------------------------------------------------------------------------------- Financial Management Training [https://efmc.eu/financial-management-training/] Brussels [https://efmc.eu/financial-management-training/] 17-19 September 2025 Online [https://efmc.eu/financial-management-training/] 01-03 October 2025 Athens [https://efmc.eu/financial-management-training/] 15-17 October 2025 Lisbon [https://efmc.eu/financial-management-training/] 05-07 November 2025 Online [https://efmc.eu/financial-management-training/] 19-21 November 2025 Vienna [https://efmc.eu/financial-management-training/] 03-05 December 2025 -------------------------------------------------------------------------------- Besides pre-award services (proposal writing) and post-award services (financial statements, trial audit, audit management or Communication, Dissemination & Communication services), EFMC proposes trainings for all stages of your Horizon Europe project Are you looking for in-house training? <<Contact us>> [https://efmc.eu/about-and-contact/] -------------------------------------------------------------------------------- [] European Fund Management Consulting Uus tn 17, 10111 Tallinn ESTONIA Tel. +372 604 1400 contact(a)efmcnewsletter.eu This email was sent to firedrake(a)imperial.ac.uk, click here to unsubscribe. Cet email a été envoyé à firedrake(a)imperial.ac.uk, cliquez ici pour vous désabonner http://xg0yo.mjt.lu/unsub2?hl=fr&m=AVMAAHp0d7IAAAAYlQ4AAKl9BooAAAABFE8AAgmr…. EFMC

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Free webinar: Your first 15 minutes with Coreform Cubit
by Kimberly White 26 Aug '25

26 Aug '25

You're invited to attend an introductory video featuring the new look of Coreform Cubit Webinar: Your first 15 minutes with Coreform Cubit Updated for v2025.8 August 28th, 2025 (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW8cLh7b7Wk6VD0gfC81wJJZ… ) 9 am Mountain Time Hi Firedrake FEM, You are invited to attend a webinar that will guide you through your first fifteen minutes with the new, updated version of Coreform Cubit. Coreform's Greg Vernon will show how to install and activate Coreform Cubit with our new license portal, and how to import CAD files and navigate the updated GUI to create your first mesh. Take me to the registration page (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW8cLh7b7Wk6VD0gfC81wJJZ… ) Previous webinars Introduction to Python scripting in Coreform Cubit (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW8cLh7b7Wk6VD0gfC81wJJZ… ) In this webinar, led by Norbert Hofbauer, you will learn how to harness the power of Python scripting and the Python API in Coreform Cubit. python.webinar-1 (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW8cLh7b7Wk6VD0gfC81wJJZ… ) Meshing Mars: How Coreform Cubit hex meshing can help advance paleomagnetic insights into Mars (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW8cLh7b7Wk6VD0gfC81wJJZ… ) In this webinar, Wyn Williams from the University of Edinburgh’s School of GeoSciences presents a cutting-edge experimental workflow that relies on the meshing capabilities of Coreform Cubit. View all previous webinars (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VW8cLh7b7Wk6VD0gfC81wJJZ… ) Coreform Inc., 1427 South 550 East, OREM, UT 84097, 801-717-2296 Unsubscribe (https://email.coreform.com/hs/preferences-center/en/direct?data=W2nWGVW47zk… ) Manage preferences (https://email.coreform.com/hs/preferences-center/en/page?data=W2nWGVW47zk4z… )

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IMPORTANT licensing update and new release
by Kimberly White 21 Aug '25

21 Aug '25

Coreform Cubit 2025.8 is now released Simulation Without Compromise Coreform Cubit 2025.8 is now released + new licensing portal Hi Firedrake FEM, Coreform Cubit 2025.8 is now released. This release includes feature improvements and modernized icons, as well as a transition to a new licensing portal (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) that makes it easier to manage your Coreform Cubit licenses. This portal is now the default for Coreform Cubit licensing. Step-by-step access instructions are here (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) . Download Coreform Cubit 2025.8 from your new account (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) License management has changed. >From now on, you will manage your license through Coreform's new account portal (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) . You will no longer need to enter product keys to start Coreform Cubit. You will simply log in with your Coreform account (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) email and password. Your account username/email and password are the same Your current active license email and password have been transferred to the new accounts portal, so you can sign in the same way you always have. If you have forgotten your password, click the "Forgot your password?" link on the login page (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) . Functional updates in 2025.8 Improved, modernized buttons and icons Coreform Cubit has a new look! When you download (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) the latest version 2025.8, you will notice a sleeker, more modern look. Most of our icons have been updated and replaced with more modern and intuitive versions. The placement and function of those icons have not changed. Fundamental upgrades Coreform Cubit's user interface framework has been upgraded to Qt6, providing better support for modern desktops. The primary triangle and tetrahedral mesher in Coreform Cubit has been updated to MeshGems 2.15. This upgrade comes with more robustness, better quality elements, and improved capabilities. Geometry healing change The geometry healing operation has been improved, but the change may affect your workflows. It is possible that entity ids may change during healing, and journal files using the old healing operation may break. Read more here (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) . Additional license information Easier License Sharing with Cloud-Hosted Licenses Cloud-hosted licenses will be the default for new Coreform licenses to let you and your team seamlessly share licenses in a self-managed environment—no IT support needed! An internet connection is required to log in, but your license will stay active even if you temporarily lose connectivity. Flexibility with Locally-Hosted Licenses If you currently have a locally-hosted Coreform Cubit floating license, it will continue to work, and Coreform will continue to support this in the future. Contact us (mailto:support@coreform.com) if you would like us to switch your locally-hosted floating license to a cloud-hosted floating license. Streamlined Academic Access If you’re part of an academic institution, you will be able to instantly access a free academic trial (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) using your academic email address by selecting "Academic" when you submit your free trial (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) request. You will also be able to purchase new licenses with a credit card from within your account (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) . New Coreform Cubit Associate Licenses The free Coreform Cubit Learn program will evolve into the Associate (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) license program. This free, non-commercial license (with a 50,000-element export limit) is perfect for universities, open-source simulation projects, and other qualifying groups. Interested? Email us (mailto:cubit@coreform.com) to apply for access codes or fill out the form here (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) . Transition Away From Node-Locked Licenses To streamline our offerings, we will no longer sell node-locked licenses after this release. Existing node-locked licenses will still work with the new system. Download Coreform Cubit 2025.8 (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) Webinar: Your First 15 Minutes with Coreform Cubit August 28th 2025 9am MST Join us for a free webinar (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) to walk new users through their first fifteen minutes with Coreform Cubit. This introductory webinar will feature the new, updated 2025.8 version. Register for the webinar (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) We’re committed to making your experience with Coreform Cubit as seamless and productive as possible. If you have any questions or need assistance, please don’t hesitate to reach out—we’re here to help! Sincerely, Kimberly White 801.717.2296 info(a)coreform.com (mailto:info@coreform.com) https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… (https://email.coreform.com/e3t/Ctc/OS+113/d2CWPq04/VWThSj1XJHRgW9bgNZ_76hhz… ) Coreform Inc., 1427 South 550 East, OREM, UT 84097, 801-717-2296 Unsubscribe (https://email.coreform.com/hs/preferences-center/en/direct?data=W2nWGVW47zk… ) Manage preferences (https://email.coreform.com/hs/preferences-center/en/page?data=W2nWGVW47zkfh… )

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Re: [firedrake] imposing boundary conditions for Hermite element MixedFunctionSpace
by Matthew Knepley 17 Jul '25

17 Jul '25

On Thu, Jul 17, 2025 at 11:06 AM Smail Merabet <merabetsmail(a)gmail.com> wrote: > The lower is a constant obstacle psi =-0.03 > I have the plot using freefem++ > 1. You cannot leave off the Cc if you want an answer from the Firedrake people 2. Did you plot your lower bound vector? The reason I ask is that I am absolutely sure that SNESVI will force the solution to be above the lower bound you input. Therefore I think you are inputting a lower bound different from what you expect. Thanks, Matt > On Thu, Jul 17, 2025 at 4:02 PM Matthew Knepley <knepley(a)gmail.com> wrote: > >> On Thu, Jul 17, 2025 at 10:49 AM Smail Merabet <merabetsmail(a)gmail.com> >> wrote: >> >>> Dear Matthew, >>> thanks for reply, I tried this: >>> >>> psi = Constant(-0.03) >>> >>> # Create the full function in mixed space >>> >>> obs = Function(Vh, name="Obstacle") >>> >>> upp = Function(Vh, name="Upper") >>> >>> >>> obs_sub1 = obs.sub(1) >>> >>> upp_sub1 = upp.sub(1) >>> >>> # Interpolate into the subfunctions >>> >>> obs_sub1.interpolate(conditional(lt(psi, 0), 0, psi)) >>> >> >> I do not understand the Firedrake side, but did you plot your lower >> bound? I have no idea what conditional gives back. >> >> Thanks, >> >> Matt >> >> >>> upp_sub1.interpolate(Constant(1e10)) >>> >>> But the result doesn't satisfy the constraint $w \geq \psi$ >>> >>> Many Thanks >>> >>> On Thu, Jul 17, 2025 at 1:22 PM Matthew Knepley <knepley(a)gmail.com> >>> wrote: >>> >>>> On Thu, Jul 17, 2025 at 7:52 AM Smail Merabet <merabetsmail(a)gmail.com> >>>> wrote: >>>> >>>>> Dear firedrake users, I try to solve a variational inequality using >>>>> snes-firedrake. >>>>> I have two unknown functions say (theta,w) >>>>> so the functionspace is Vh = MixedFunctionSpace([Th,Wh]) >>>>> where >>>>> Th = FunctionSpace(mesh, "Lagrange", 1) >>>>> Wh = FunctionSpace(mesh, "Lagrange", 2) >>>>> >>>>> >>>>> the inequality constraint concerns only $w$ >>>>> >>>>> I set : >>>>> obstacle = Function(Vh.sub(1)).interpolate((Constant(-0.03))) >>>>> upper = Function(Vh.sub(1)).interpolate(Constant(1e10)) >>>>> >>>> >>>> The SNES is operating on the full space, but you have interpolated >>>> constraints on the subspace. You have to inject those to full space vectors >>>> before setting the bounds. >>>> >>>> Thanks, >>>> >>>> Matt >>>> >>>> >>>>> *solver.solve(bounds=(obstacle, upper)) * >>>>> >>>>> but this line causes the following error: >>>>> >>>>> File "/Users/maths/Desktop/Firedrake/VI/Timoshenko-obs.py", line 64, >>>>> in <module> >>>>> solver.solve(bounds=(obstacle, upper)) >>>>> File "petsc4py/PETSc/Log.pyx", line 188, in >>>>> petsc4py.PETSc.Log.EventDecorator.decorator.wrapped_func >>>>> File "petsc4py/PETSc/Log.pyx", line 189, in >>>>> petsc4py.PETSc.Log.EventDecorator.decorator.wrapped_func >>>>> File >>>>> "/Users/maths/firedrake/src/firedrake/firedrake/adjoint_utils/variational_solver.py", >>>>> line 89, in wrapper >>>>> out = solve(self, **kwargs) >>>>> File >>>>> "/Users/maths/firedrake/src/firedrake/firedrake/variational_solver.py", >>>>> line 312, in solve >>>>> self.snes.setVariableBounds(lb, ub) >>>>> File "petsc4py/PETSc/SNES.pyx", line 1978, in >>>>> petsc4py.PETSc.SNES.setVariableBounds >>>>> petsc4py.PETSc.Error: error code 75 >>>>> [0] SNESVISetVariableBounds() at >>>>> /Users/maths/firedrake/src/petsc/src/snes/impls/vi/vi.c:424 >>>>> [0] SNESVISetVariableBounds_VI() at >>>>> /Users/maths/firedrake/src/petsc/src/snes/impls/vi/vi.c:443 >>>>> [0] Arguments are incompatible >>>>> [0] Incompatible vector lengths lower bound = 201 solution vector = >>>>> 302 >>>>> >>>>> >>>>> Hope that one can help me ... >>>>> >>>>> Best regards. >>>>> Smail. >>>>> >>>>> On Fri, Apr 11, 2025 at 9:11 AM Smail Merabet <merabetsmail(a)gmail.com> >>>>> wrote: >>>>> >>>>>> Dear firedrake users, >>>>>> >>>>>> I try to solve a fourth-order 1d nonlinear problem using the Hermite >>>>>> element in firedrake. >>>>>> The functional space for the weak solution is: >>>>>> $$\mathcal{H}\times \mathcal{H}/times H^{2}_{0} $$ >>>>>> where, >>>>>> $$ >>>>>> \mathcal{H} = \left\lbrace f\in H^2([0,\ell]), \; f(0)=0, \; f'(0)=0 >>>>>> \right\rbrace. >>>>>> $$ >>>>>> I can't impose the boundary conditions correctly. When I compile the >>>>>> code, I get the following error: >>>>>> FiniteElement('Hermite', interval, 3), name=None, index=1, >>>>>> component=None), IndexedProxyFunctionSpace(<firedrake.mesh.MeshTopology >>>>>> object at 0x125a2ce80>, FiniteElement('Hermite', interval, 3), name=None, >>>>>> index=2, component=None), name='None_None_None'), >>>>>> Mesh(VectorElement(FiniteElement('Lagrange', interval, 1), dim=1), 0)), 9) >>>>>> defined on incompatible FunctionSpace! >>>>>> >>>>>> Note the same problem was implemented using FEniCS with C0-interior >>>>>> penalty method, in the reference (sec. 3 eq 3.12-3.13): >>>>>> >>>>>> Enhanced models for the nonlinear bending of planar rods: >>>>>> localization phenomena and multistability >>>>>> by: >>>>>> Matteo Brunetti , Antonino Favata and Stefano Vidoli. >>>>>> >>>>>> I attached the codes to this email. >>>>>> >>>>>> Thanks in advance >>>>>> Smail MERABET >>>>>> >>>>>> _______________________________________________ >>>>> firedrake mailing list >>>>> firedrake(a)imperial.ac.uk >>>>> https://mailman.ic.ac.uk/mailman/listinfo/firedrake >>>>> >>>> >>>> >>>> -- >>>> What most experimenters take for granted before they begin their >>>> experiments is infinitely more interesting than any results to which their >>>> experiments lead. >>>> -- Norbert Wiener >>>> >>>> https://www.cse.buffalo.edu/~knepley/ >>>> <http://www.cse.buffalo.edu/~knepley/> >>>> >>> >> >> -- >> What most experimenters take for granted before they begin their >> experiments is infinitely more interesting than any results to which their >> experiments lead. >> -- Norbert Wiener >> >> https://www.cse.buffalo.edu/~knepley/ >> <http://www.cse.buffalo.edu/~knepley/> >> > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>

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