May 2021 - firedrake - imperial.ac.uk

Broken Installation
by Davies, Calvin 01 Jun '21

01 Jun '21

Hi, I am a MSc student at Imperial currently trying to use firedrake as part of my final research project. I am operating on a macOS Big Sur (11.2.3). I believe I have the necessary requirements on my system, however part way during building PETSc it broke, and appears to have an issue with 'pastix'. Please see attached the log files Any help would be much appreciated. Cheers, Calvin

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Questions about Flooddrake
by Boyuan Yu 20 May '21

20 May '21

Hello all, I am a beginner for Firedrake whose application is simulation of shallow water equation. When I was running several example codes of Flooddrake, I encountered the error: firedrake:WARNING Your kernel body contains a double indirection. You should update it to single indirections. and the compilation process cannot be performed. Is this error due to the incompatibility between Firedrake and Flooddrake? Because it seems that Flooddrake is not maintained for a long time. Is Thetis the new alternative to Flooddrake now? Thank you in advance for answering my questions. Boyuan

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Changes to YouTube's Terms of Service
by YouTube 19 May '21

19 May '21

You're receiving this email because we're updating the YouTube Terms of Service <https://notifications.google.com/g/p/AD-FnExqRsmAZGNvmlab6HoNNiPdvE7lPvwJLf…> ('Terms') to clarify our terms and provide transparency to our users. The Terms were similarly updated in the United States in November 2020. These changes shouldn't significantly alter your access or use of the YouTube service. A summary of the changes: * Facial recognition restrictions: The Terms of Service already state that you cannot collect any information that might identify a person without their permission. While this has always included facial recognition information, the new Terms make that explicitly clear. * YouTube's right to monetise: YouTube has the right to monetise all content on the platform, and ads may appear on videos from channels not in the YouTube Partner Programme. * Royalty payments and tax withholding: For creators entitled to revenue payments, such payments will be treated as royalties from a US tax perspective, and Google will withhold taxes where required by law. Please make sure that you read the updates to the Terms carefully. The new Terms <https://notifications.google.com/g/p/AD-FnEw3KjL87CLsxQReunk2wU3UyasIZCgPH_…> will take effect on 1 June 2021 for users outside the US. By continuing to use YouTube after this date, you are agreeing to the new Terms. Please note, if you allow your child to use YouTube Kids, then you are agreeing to the new Terms on behalf of your child as well. If you would like more information, visit our Help Centre <https://notifications.google.com/g/p/AD-FnEzH7vpxPVNUq5OqY3QGA2S1wLKRkvSlB8…> . You received this mandatory email service announcement to update you about important changes to the YouTube Terms. (c) 2021 Google Ireland Ltd, Gordon House, Barrow Street, Dublin 4, Ireland

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Delete element to model notch/crack in an Extruded Mesh
by Venketeswaran, Abhishek (FN) 07 May '21

07 May '21

Hi, I have created a hexahedral mesh of a pipe by extruding an annulus meshed with quadrilateral elements. I need to model a notch or crack by deleting elements from the mesh. I looked into mesh.py but I am not confident of what functions I need to look into. Can anyone help me with a simple code to delete an element for a given extruded mesh or list the functions that I should look into? Thanks -- Abhishek Venketeswaran NETL Research Associate - ORISE National Energy Technology Laboratory Department of Energy abhishek.venketeswaran(a)netl.doe.gov Work: 412-386-4833 Mobile: 716-507-7890 www.netl.doe.gov<http://www.netl.doe.gov> [cid:ac47681d-8c17-436a-9f44-a590b712d3bd]

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KeyError using a Gmsh generated hexahedral mesh
by Venketeswaran, Abhishek (FN) 05 May '21

05 May '21

Hi, I successfully generated a hexahedral mesh using Gmsh. Please find the code in the .txt file attached here. I then tried to use the mesh in Firedrake. Please find below the code: from firedrake import * mesh=Mesh('pipev1.msh') I get a KeyError:6 from ufl.Cell module. Kindly help me. Thanks -- Abhishek Venketeswaran NETL Research Associate - ORISE National Energy Technology Laboratory Department of Energy abhishek.venketeswaran(a)netl.doe.gov Work: 412-386-4833 Mobile: 716-507-7890 www.netl.doe.gov<http://www.netl.doe.gov> [cid:d5f4824f-4769-4311-b539-64bf8a6d05d2]

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KeyError with using a Gmsh generated hexahedral mesh
by Venketeswaran, Abhishek (FN) 02 May '21

02 May '21

Hi, I successfully generated a hexahedral mesh using Gmsh (the python file is attached here). I then tried to use the mesh in Firedrake. Please find below the code: from firedrake import * mesh=Mesh('pipev1.msh') I get a KeyError:6 from ufl.Cell module. Kindly help me. Thanks -- Abhishek Venketeswaran NETL Research Associate - ORISE National Energy Technology Laboratory Department of Energy abhishek.venketeswaran(a)netl.doe.gov Work: 412-386-4833 Mobile: 716-507-7890 www.netl.doe.gov<http://www.netl.doe.gov> [cid:8e261aa0-bff1-4ab3-b5c3-1e789205f14b]

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