[Gmsh] How to add information in the mesh file

Hullo everybody. It would be very useful for me to have the possibility to assign a given number of parameters to each surface (say 2/3 integers and 2/3 floats), and have them printed out in the mesh file (or even in a separate file). These parameters represent the boundary conditions

[Gmsh] info on nodes and cells neighbours

Hullo everybody, I’m using Gmsh to generate 3D tetrahedral meshes. My question is: for a given mesh, is it possible to know (in advance) the maximum number of node neighbours (i.e. all the nodes which share an edge with a given node) and of cell neighbours (i.e. the cells which share at least

[Gmsh] Geometry modification on physical entities

Geometry modifications (such as a rotation) can only be applied to elementary entities? Is there a way to apply them on physical entities instead? Thank you. Alessandro ___ gmsh mailing list gmsh@onelab.info http://onelab.info/mailman/listinfo/gmsh

[Gmsh] R: R: Geometry modification on physical entities

...@cea.fr] Inviato: lunedì 6 febbraio 2017 11.03 A: Alessandro Vicini Cc: g...@geuz.org Oggetto: RE: [Gmsh] R: Geometry modification on physical entities Hello Alessandro, Have a look at the enclosed file for an example of what Christophe was mentioning. Also, I don't understand what you are trying

[Gmsh] R: Geometry modification on physical entities

I'm afraid this is not clear to me, how can I use this feature from command line? Thank you. Alessandro -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@ulg.ac.be] Inviato: domenica 5 febbraio 2017 10.34 A: Alessandro Vicini Cc: g...@geuz.org Oggetto: Re: [Gmsh

[Gmsh] how to select all entities

Supposing for example I wish to apply a geometrical transformation to my whole geometry, how could I select all points at once? Or which could be the command to add in the .geo file? Thank you. Alessandro ___ gmsh mailing list gmsh@onelab.info

[Gmsh] how to select all entities

No answers to my question (in red below) from yesterday means it is not possible...? Thank you. Supposing for example I wish to apply a geometrical transformation to my whole geometry, how could I select all points at once? Or which could be the command to add in the .geo file? Thank

[Gmsh] Version 3

I just downloaded latest version and had a quick look at it. First of all, thank you to all developers as the new version is really a big step forward. I have one question: I see that if I generate a sphere using its primitive function, and then I export the unrolled geometry, I find splines

[Gmsh] older versions

Hullo everybody, is it possible to find older versions of the software somewhere? I would be interested in version 2.9.3 (or other versions "close" to that) Alessandro ___ gmsh mailing list gmsh@onelab.info

[Gmsh] mesh refinement using scalar field

Hullo everybody, after generating a first mesh, I use my code to compute a scalar field at cell centers; I would then like to use this scalar field to adapt the mesh size. Which would be the necessary steps? Thank you. A. ___ gmsh mailing list

[Gmsh] Gmsh .msh file

Hullo, the elements which are printed out in the msh file are the boundary faces and the tetrahedral. Is there some way to have also the connectivity of all internal faces? Thank you. Alessandro ___ gmsh mailing list gmsh@onelab.info

[Gmsh] R: Gmsh .msh file

users. I wonder if there exist a more intuitive way of dealing the Mesh.SaveAll option. -- jeremy www.seamplex.com On Thu, 2017-06-29 at 08:46 +, Alessandro Vicini wrote: > Hullo, > > the elements which are printed out in the msh file are the boundary > faces and the

[Gmsh] R: R: Gmsh .msh file

amplex.com] Inviato: giovedì 29 giugno 2017 11:53 A: Alessandro Vicini; gmsh@onelab.info Oggetto: Re: R: [Gmsh] Gmsh .msh file define one (or more) physical volumes On Thu, 2017-06-29 at 09:22 +0000, Alessandro Vicini wrote: > Yes, the problem is that I would like to have physical entiti

[Gmsh] R: Gmsh .msh file

ese cannot be the connectivity of internal faces -Messaggio originale- Da: Jeremy Theler [mailto:jer...@seamplex.com] Inviato: giovedì 29 giugno 2017 12:28 A: Alessandro Vicini; gmsh@onelab.info Oggetto: Re: R: R: [Gmsh] Gmsh .msh file 1. not if you also define physical volumes (can a

[Gmsh] Issues with geo file

Hullo everybody, no luck the first time, so I try again with my question... I've got two issues with the attached geo file: 1) There are circle arcs defined and then rotated; this causes gmsh to give a number of errors of the kind "control points of circle xxx are not co-circular". Now, as

[Gmsh] - problem with Opencascade

Please consider the attached .geo file: there is an external boundary surface, and an internal cylinder generated using the OpenCascade primitive. After its generation, the cylinder volume and base surfaces are deleted (the remaining surface should then be embedded in the outer volume). At

[Gmsh] Issues with geo file

Hullo everybody, I've got two issues with the attached geo file: 1) There are circle arcs defined and then rotated; this causes gmsh to give a number of errors of the kind "control points of circle xxx are not co-circular". Now, as the points ARE co-circular, how can I avoid these errors? Is

[Gmsh] problem with already existig tags

Hullo everybody. I start from the attached test.geo file, and I copy at its bottom the other file, farfield.geo. As can be seen in the latter all new geometrical entities are built using new registers (newp, newl, news and so on). However, when I load the combined file, I get errors (entities

[Gmsh] R: Control points not cocircular

Thank you! A. -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@ulg.ac.be] Inviato: mercoledì 6 settembre 2017 10:28 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] Control points not cocircular Hi Alessandro, I fixed the bug. The spurious errors were

[Gmsh] R: problems (with opencascade?)

In fact that's what I did in the meantime as a workaround. I'll wait for the bug to be fixed, thank you! A. -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@ulg.ac.be] Inviato: lunedì 25 settembre 2017 15:26 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh

[Gmsh] R: problems (with opencascade?)

Any help for my issues...? Pleeease :-) A. -Messaggio originale- Da: gmsh [mailto:gmsh-boun...@ace20.montefiore.ulg.ac.be] Per conto di Alessandro Vicini Inviato: venerdì 22 settembre 2017 09:00 A: gmsh@onelab.info Cc: Christophe Geuzaine Oggetto: [Gmsh] problems

[Gmsh] R: problems (with opencascade?)

he circles in the geometry were generated by first rotating/translating the points, instead of rotating/translating surfaces). A. -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@ulg.ac.be] Inviato: mercoledì 27 settembre 2017 12:06 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto:

[Gmsh] R: Issues with OpenCascade

Any hint...? -Messaggio originale- Da: gmsh [mailto:gmsh-boun...@ace20.montefiore.ulg.ac.be] Per conto di Alessandro Vicini Inviato: lunedì 23 ottobre 2017 12:35 A: gmsh@onelab.info Oggetto: [Gmsh] Issues with OpenCascade Hullo everybody, I find the following issues when using

[Gmsh] R: Problem in transformation of surfaces list

A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] Problem in transformation of surfaces list Hi Alessandro, The problem is the order of the operations. You do a rotation of surfaces that define volume 1. That’s why they are kept. The rotation is properly handled if you write it as follows: tmp

[Gmsh] Mesh file format v4

I generate a mesh using the latest v4.0 executable. If I look at the statistics I see 24207 nodes and 125393 tetrahedra. I export the mesh file using both v2 and v4 ascii formats. Now, in the v2 format file I see: $Nodes 22775 While in the v4 format file I see: $Nodes 887 24177 My

[Gmsh] Mesh file format v4

Any hint...? --- I generate a mesh using the latest v4.0 executable. If I look at the statistics I see 24207 nodes and 125393 tetrahedra. I export the mesh file using both v2 and v4 ascii formats. Now, in the v2 format file I see: $Nodes 22775 While in the v4 format file I see: $Nodes

[Gmsh] (again) on v4 mesh format

In version v2 of the mesh file, surface elements are directly associated to the physical ID of the surface they belong to (which is useful). If I get it right, in version v4 this direct association is missing: the surface elements are associated with the elementary ID of the surface, and the

[Gmsh] R: Mesh file format v4

A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] Mesh file format v4 > On 27 Aug 2018, at 11:33, Alessandro Vicini > wrote: > > > I generate a mesh using the latest v4.0 executable. If I look at the > statistics I see 24207 nodes and 125393 tetrahedra. > I expor

[Gmsh] R: Max number of fields

>> In such extreme cases I would precompute the desired mesh size constraints >> on a background mesh. >> Christophe How would you do that? In my case I'd need a number of fields of around 10^5. I have already a "background" mesh; the idea is to generate a starting mesh, start the

[Gmsh] Max number of fields

Hello Gmsh users, is there some limitation whatsoever to the number of fields that can be defined for mesh size control? I think I might need a “huge” number of fields for some automatic adaptive grid refinement… A. ___ gmsh mailing list

[Gmsh] R: Question about Progression and Bump

It might be useful having the possibility to specify the number of intervals and the length of the first element, rather than the progression… A. Da: gmsh [mailto:gmsh-boun...@ace20.montefiore.ulg.ac.be] Per conto di Ruth Vazquez Sabariego Inviato: mercoledì 24 ottobre 2018 16:28 A: Nathan J.

[Gmsh] R: Mesh file format v4

e 2), but there are still perhaps some inconsistencies in the number of nodes...? -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@uliege.be] Inviato: giovedì 30 agosto 2018 14:44 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] Mesh file format v4 > On 30 Aug 2018, at

[Gmsh] command line options

I usually work interactively, and I go through the following steps to generate a 3D mesh: 1) 2D mesh; 2) Smoothing of the 2D mesh (repeated a few times); 3) 3D mesh; 4) Optimization of 3D mesh. How would I carry out the same process from command line? Thank you. A.

[Gmsh] R: command line options

2018 14:54 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] command line options You can get all the available options by typing in the command line: gmsh -—help 2D mesh => -2 3D mesh => -3 gmsh -smooth number_steps gmsh -optimize Best, Ruth On 21 Sep 2018, at 14:47, Ales

[Gmsh] R: command line options

] Inviato: venerdì 21 settembre 2018 14:54 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] command line options You can get all the available options by typing in the command line: gmsh -—help 2D mesh => -2 3D mesh => -3 gmsh -smooth number_steps gmsh -optimize Best, Ruth On

[Gmsh] Missing surface label and duplicate surfaces

With reference to the attached contour.geo file (including background.geo which is merged into it), gmsh does not show surface #14: the label is not shown, and also its graphic representation as "cross" is not visible. Moreover, when I generate the volume some of the surfaces are duplicated;

[Gmsh] R: Problem with extrusion

Great, thank you! A. -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@uliege.be] Inviato: martedì 27 novembre 2018 19:47 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] Problem with extrusion Indeed for some reason OpenCASCADE does not seem to like

[Gmsh] R: Problem with extrusion

the points along every direction, but is it possible to avoid this? Thank you. A. -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@uliege.be] Inviato: martedì 27 novembre 2018 13:32 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] Problem with extrusion

[Gmsh] R: Problems with 2D mesh

...@uliege.be] Inviato: mercoledì 21 novembre 2018 17:32 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] Problems with 2D mesh > On 20 Nov 2018, at 09:10, Alessandro Vicini > wrote: > > Hello Christophe, > > the surface mesh i

[Gmsh] Problem with extrusion

Considering the attached geo file, why there is no surface generated by the extrusion? Thank you. Regards, Alessandro extrude.geo Description: extrude.geo ___ gmsh mailing list gmsh@onelab.info http://onelab.info/mailman/listinfo/gmsh

[Gmsh] Visualization of background field

Hello, is it possible to visualize the background field (obtained as the "min" of several fields)? A. ___ gmsh mailing list gmsh@onelab.info http://onelab.info/mailman/listinfo/gmsh

[Gmsh] about background fields

I was wondering whether it could be possible in one of next releases to assign a mesh background field through a list of points with associated control length, i.e.: [x, y, z, lc]_i , i=1,...,N This would be quite handy for an automatic grid refinement procedure... A.

[Gmsh] crash when generating 3D mesh

Gmsh (v4.0.5) crashes when generating the 3D mesh for the attached thruster.geo file (plus background.geo which is merged into it). This happens after I added the cone at the end of the geo file, to embed its external surface in the volume. Any reason for this...? Thank you. A.

[Gmsh] R: crash when generating 3D mesh

Just tried with 4.1.5, but it still crashes... -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@uliege.be] Inviato: giovedì 14 febbraio 2019 15:49 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] crash when generating 3D mesh Seems ok with 4.1.5 - give

[Gmsh] Problem with surface loop

In the attached geo file gmsh does not see the surface as a closed volume (as it should be)... why? Thank you. Alessandro HT20K_NearField.geo Description: HT20K_NearField.geo ___ gmsh mailing list gmsh@onelab.info

[Gmsh] Frustum background field

The "frustum" kind of background field uses a bilinear distribution for the mesh size, from inner to outer radius and from one side to the other. For my particular needs (but hopefully not only mine), it would be useful to have a bi-exponential distribution. Could this be introduced in one

[Gmsh] Post-processing fields

I try to post my question again: I have a number of scalar fields, some defined on the nodes, other defined on cell centers. Can I associate all the scalar fields in the same view (one for elements and one for nodes), or do I have to generate one view per field (i.e. one $ElementData or

[Gmsh] R: Post-processing stress field

Great, thank you. Could you clarify what are the 9 values that you associate with the element and with each node? A. -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@uliege.be] Inviato: giovedì 31 gennaio 2019 09:46 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re

[Gmsh] R: Post-processing stress field

have to generate one view per field (i.e. more $ElementData or $NodeData blocks)? -Messaggio originale- Da: Christophe Geuzaine [mailto:cgeuza...@uliege.be] Inviato: giovedì 31 gennaio 2019 09:46 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] Post-processing stress field

[Gmsh] R: Post-processing stress field

I would be grateful if you could post a similar MSH2 example for a tetrahedron grid, with 1 data field assigned on nodes and another one assigned on cell centers... A. -Messaggio originale- Da: gmsh [mailto:gmsh-boun...@ace20.montefiore.ulg.ac.be] Per conto di Christophe Geuzaine

[Gmsh] R: [gmsh] "silly" question

A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] [gmsh] "silly" question Hi Alessandro, The most straightforward way I can think of would be to use a CAD program to make the 3D letters, export the model as STEP and then mesh that. Tinkercad is one free option (I think you ne

[Gmsh] [gmsh] "silly" question

I would like to generate a 3d mesh for the volume obtained by extrusion of a text. So what I need to do is to import the text (as an image?) in gmsh, convert it somehow in a 2d geometry and then extrude it... Is this possible? Thank you. Alessandro

[Gmsh] R: problem with surface creation

lto:cgeuza...@uliege.be] Inviato: martedì 2 luglio 2019 15:33 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto: Re: [Gmsh] problem with surface creation > On 2 Jul 2019, at 11:05, Alessandro Vicini > wrote: > > > > With reference to the attached geo file, I’m trying

[Gmsh] R: Problem with volume definition

Hello Christophe, I am already using 4.4. In the meanwhile I solved the problem, see the attached geo file (in the section "ARM"). A. -Messaggio originale- Da: Christophe Geuzaine Inviato: domenica 14 luglio 2019 23:04 A: Alessandro Vicini Cc: gmsh@onelab.info Oggetto:

[Gmsh] problem with surface creation

With reference to the attached geo file, I’m trying to generate some conical surfaces using “surface filling”, for example for the surface bounded by circles 22 and 21; but I get the message “OpenCascade surface filling requires a single line loop”… If I switch to the built-in geometry kernel

[Gmsh] Change in V4 mesh format?

Hello, I’ve just switched to version 4.4.0 from 4.1.5, and I’m having troubles in the pre-processing of the mesh file. Is there any change in the V4 ascii format…? Thank you. Alessandro ___ gmsh mailing list gmsh@onelab.info

[Gmsh] R: R: ellipsoid issue

Hello Peter, in my case Gmsh just gets stuck when trying to read the geo file. No messages or whatsoever, I need to kill the program. I just downloaded 4.4.1, but I get the same behavior. A. Da: Peter Johnston Inviato: venerdì 6 settembre 2019 04:08 A: Jeremy Theler ; Alessandro Vicini ; g

[Gmsh] R: R: R: ellipsoid issue

...@geuz.org; Alessandro Vicini Oggetto: Re: R: [Gmsh] R: ellipsoid issue Thanks Alessandro, I just ran mine again and I get the same behaviour as previously, with the same error messages. I’m not sure what these means, but perhaps someone else can contribute? Thanks again, Peter

[Gmsh] R: Different behaviour in Win or Linux

Hello Jeremy, under windows the “about gmsh” button says OCC version 7.3.1, under Linux it says OCC version 7.3.0, if this is what you mean… A. Da: jeremy theler Inviato: lunedì 22 luglio 2019 18:00 A: Alessandro Vicini Cc: Gmsh Oggetto: Re: [Gmsh] Different behaviour in Win or Linux Hi

[Gmsh] R: Gmsh - Transfinite

With transfinite line you set the number of nodes, not elements. So if you set an odd number, you will get an even number of elements. A. Da: gmsh Per conto di Eduardo Inviato: martedì 16 luglio 2019 03:31 A: g...@geuz.org Oggetto: [Gmsh] Gmsh - Transfinite Hy My name is Eduardo I am

[Gmsh] Different behaviour in Win or Linux

A geo file which works under windows has problems when read under Linux64 (same code version, 4.4). I guess this is because of a different numbering of geometrical entities derived from transformations or boolean operations. Should I expect this? Is there a way to ensure "compatibility" of