Dear Hydrus Experts,
I met a problem while I am generating 3D mesh using the version of 2.05. The error is an input error telling me that I have BND_FACES or BND_QUADS missing. I really have no idea how to solve this and hope you can help me. The screenshot below shows the detail about the error and I also attached my work.
Thank you,
Yufan
T3D Internal Error
T3D Internal Error
 Attachments

 ND3D.zip
 (51.03 KiB) Downloaded 86 times

 error log.JPG (67.75 KiB) Viewed 1222 times

 Internal error.JPG (47.42 KiB) Viewed 1222 times
Re: T3D Internal Error
This error message means that the surface mesh (input mesh for the 3D mesh generator) is incorrect and some boundary faces are missing. This is probably caused by insufficient density of the 2D mesh, i.e. incorrectly defined mesh refinements. I see that you are trying to refine the mesh on the pipe using some lines but note that these line are not integrated in any solid and has no influence on the mesh. Also the mesh refinement #5 on Solid 2 is quite wrong and was probably intended for Solid No. 11. I fixed your mesh refinements, which solved the original problem (the fixed project is attached) but there is another problem with very sharp angles and almost zerothickness of some solids(see pictures below). The mesh optimization for your domain is not a trivial task and can take several hours, which is out of the range of free support.
Mirek
Mirek
 Attachments

 ND3D_Multi_5M.zip
 (47.2 KiB) Downloaded 84 times
Re: T3D Internal Error
Mirek,
Thank you so much for your help. I will work on the left over problems
Yufan
Thank you so much for your help. I will work on the left over problems
Yufan

 Posts: 19
 Joined: Tue Jun 12, 2018 12:49 pm
 Location: Oman
Re: T3D Internal Error
Dear HYDRUS 3D users
I am also doing 3D modelling on my project and now i got the same problem. I Red problem description and suggestion but i could not identify how to solve it in my model. Could anyone help me to detect the exact reason on my model and how can i solve it. I really want to learn how to identify the problem and solve it. I tried to reduce and increase the mesh size and mesh refinement but it did not work.
I am using HYDRUS 3D professional version 3.01.1360
I attached here my project so you can look at it and guide me
Waiting to hear back from you
I am also doing 3D modelling on my project and now i got the same problem. I Red problem description and suggestion but i could not identify how to solve it in my model. Could anyone help me to detect the exact reason on my model and how can i solve it. I really want to learn how to identify the problem and solve it. I tried to reduce and increase the mesh size and mesh refinement but it did not work.
I am using HYDRUS 3D professional version 3.01.1360
I attached here my project so you can look at it and guide me
Waiting to hear back from you
 Attachments

 st1_scb_d0.75cm_wet.rar
 (598.34 KiB) Downloaded 51 times
Re: T3D Internal Error
The problem is in incorrectly defined boundary of solid V2. See the selected surfaces in the attached screenshot  these surfaces are boundaries of solids V3 and V4, which are "internal solids" of solid V2. This is OK, since both solids indeed lie inside solid V2 and do not touch its boundary. However, in such a case surfaces 11,12,1526 should not be defined explicitly as boundary surfaces of V2 (this "boundary" is created automatically from "internal solids"). The solution is to remove surfaces 11,12,1526 from the list of boundary surfaces of Solid 2, i.e. the correct list of boundary surfaces is 1,510,13,14,2734. You will also have to increase the maximum number of meshnodes, since your mesh will have almost 600k mesh nodes and about 1.5 mil. FE. Attached is the fixed project.
M.
M.
 Attachments

 st1_scb_d0.75cm_wet_fixed.zip
 (730.49 KiB) Downloaded 47 times

 Posts: 19
 Joined: Tue Jun 12, 2018 12:49 pm
 Location: Oman
Re: T3D Internal Error
Dear Mirek,
Thanks for your reply with detailed explanation. I followed your advice and it really solve the problem. I know that my biggest mistake was to use the boundary surfaces of the internal solids as boundary surfaces for solid 2.
I really thank you
Regards
Thanks for your reply with detailed explanation. I followed your advice and it really solve the problem. I know that my biggest mistake was to use the boundary surfaces of the internal solids as boundary surfaces for solid 2.
I really thank you
Regards