✅ ANSYS MESHING - Hexahedral Mesh - Pipe - Part 2/2
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- Опубликовано: 14 ноя 2018
- Tutorial about how to generate a hexahedral mesh in a pipe, this is a type of structured mesh.
#Ansys #AnsysMeshing #HexahedralMesh
Computational Fluid Dynamics
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![[CFD] Meshing Guide for Pipes and Ducts (O-grid, hexcore, polyhedra)](/img/1.gif)
Thanks dawg, very clear video. Was able to use it for something totally different and it worked perfectly!
Thank you!
the background music was excellent. Nice video, thank you
Thank you so much!
Best Regards
Beautifull!!! I'm stunned Oo
Thnaks frriend
Best regards
Thank you for your video! It is really useful for me.
I want to ask you a things. If there are some protrusionses like vortex generator on cylinder, how we can get meshes like you made in this video? If you answer this question, it will really help me.
Amazing!
Thanks!
Hi Ninja, Thanks a million for the video! Could you please explain why there's an inflation layer inserted towards the end of the video when there's already a radial bias that was given to the mesh @3:15 ? Thanks!
Hey Ninja,
I was trying to do the tutorial for this mesh, everything works out great until I do the inflation; it rotates the elements inside inflation layer by a degrees creating cells with higher skewness.
Do you have any idea what might cause that?
Regards
Thank you! This is amazing. Is there a way to remove the extra bodies and keep the mesh, so we can reduce the number of zones in Fluent? I had trouble selecting the zones and defining boundary conditions due to the partition.
Hi Anaís; Maybe this tutorial can help: ruclips.net/video/GBdSbEVWjVI/видео.html
It is one domain with a structured mesh.
Best regards
@@ansys_cfd Thank you!
You're welcome
Once in Fluent, do you merged the fluid zones into one? Or you prescribe the boundary conditions for each of them, in which case, do you need to make the interfaces or the Fluent understand it is all one fluid (multibody) zone? Thanks
Buenas tardes. Muchas gracias por el video, sin duda es un aporte excepcional. Tengo un problema sin embargo con esta malla. A pesar de que las celdas están perfectamente geometricamente alineadas, el acomplamiento que hace fluent entre los cuerpos genera algunos residuos numéricos. Es posible solucionar esto ? Saludos y muchas gracias !!
Estimado, para evitar este problema debes unir los cuerpos seleccionandolos en modulo Geometry y unirlos usando la opción Form New Part. Esto generará una malla conforme real, sin problemas en las interfaces. Saludos!
Hola Martin; gracias por la pregunta y la respuesta.
Saludos
@@ansys_cfd Estimado, al parecer esto no soluciona el problema. Estoy haciendo un caso en que se impone un campo magnético al flujo y en las interfaces se generan errores importantes incluso habiendo discontinuidades en la velocidad. Tienes alguna idea de como solucionar esto? Saludos!
Thanks it so useful
You're welcome friend
Amazing
But i have one question.. what is the importance for alligning the cells together? like how it affects the solution?
Thanks
Thanks friend:
When you align the mesh elements you create an ordered structure that allows the computational calculation to be faster if we compare it with an unstructured mesh such as tetrahedral mesh.
Best regards
The mesh is beautiful, would not it be simpler to use shared topology though? :)
Hi friend, Yes, However, this tutorial was an answer to a subscriber that want to generate this structured mesh type.
Regards
Hay CFD NINJA, can you do a structured mesh for a T-junction - would really appreciate it
Hi friend;
I will try to make a tutorial about that.
Regards
Buenas tardes, excelente video. Una pregunta Ing. Ivan, si yo quiero mallar solo un a superfice en el msh de ansys, o un solido con el espesor de un elemtno que generalmente se utiliza en simulaicones en 2D por el costo computacional, existe un itpo de malla que sea triangular, que los triangulos sean equilateros y casi el 100 % tenga las mismas medidas (lados del triangulo), (practicamente una malla uniforme compuestos por triangulso casi equilateros) gracias por la respuesta. Nota: Hay un software que realiza eso que es el gmsh, pero cuando se exporta, la malla se mueve un poco con respecto a su origen, y da algunos errores en la simulacion.
Hola Samy, que gusto saber de ti, sobre tu consulta, Ansys por defecto genera una malla estructurada (cuadrados o cubos) para geometrías simples, sin embargo se puede crear una malla triangular usando Face Meshing, esta opción nos permite generar elementos triangulares de igual tamaño, pero no son equiláteros sino isósceles. Si con el Gmsh no funciona, intenta con el Salome, o el ICEM CFD.
Saludos
Gracias Ing. Ivan, pude realizarlo insertando un metodo tipo Quadrid/Tri, depois en la opcion All Tri, cambiando la opcion malla controlada por malla uniforme, asi me funcionó, lo estuve intentanto. Gracias por su respuesta, ya que ahora tengo mas opciones a la mano. Espero que con lo que consegui realizar, podria ayudar a alguien mas.
@@sammycristopher4921 Excelente Samy, gracias y saludos
Hey Ninja Good job. I am trying to do the same mesh that you have on your video but I have a pipe with diffuser and a nozzle and for some reason I cannot get the same mesh. Also the center pipe has two dimeters. The error is "the meshing has completed but some elements are not compliant with the applied shape" I really need to have the same mesh that you created because I am running a compressible subsonic turbulent flow (hydrogen) but I cannot make that mesh. Do you have any suggestion? Thank you
Hi friend;
Maybe this tutorial can be help: ruclips.net/video/GBdSbEVWjVI/видео.html
Best regards
Here the fluid flow is i the middle right? But there are two bodies in the middle... So how to define the fluid domain having two bodies?
Hi friend, If you want to use one domain, please check this tutorial: ruclips.net/video/GBdSbEVWjVI/видео.html&
It is structured mesh too.
Best regards
I'm getting a really high aspect ratio on the walls after using this technique, is this a problem and is there a way to fix it?
Hi friend,
What values of aspecto ratio do you obtain?
Regards
In fluent there is auto-defined wall b.c between bodies and ı cannot delete them. How can ı solve it ?
Return to Ansys Mesh and name the boundary conditions. Regards
@@ansys_cfd ı actually named boundary conditions as inlet, outlet and wall b.c. . However, in the pipe there is one extra wall b.c between bodies. It looks like pipe in pipe.
How Do I do that but with a conver-diver nozzle?
Hi friend;
Do you have the geometry?
Regards
@@ansys_cfd May I send it to you by email? It's a Solidworks file.
too complex to define blocks, ICEMCFD is the boss
Hi friend;
Here a tutorial easier using Ansys Meshing: ruclips.net/video/GBdSbEVWjVI/видео.html
Yes ICEM CFD is much better. Here some tutorials using ICEM: cfd.ninja/tutorials/icem-cfd/
Soon more ICEM CFD tutorials.
Regards