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Originally Posted by -mAx-

delete all volume mesh with lower geometry option enabled.
Then just work with fluid-5

Still the same error, I deleted all the volume mesh and just work with fluid-5.

[-mAx-]

again: delete all volume mesh (also mesh from fluid-5)
Then mesh surface 1 and 6
On your first picture I see a mesh on surface 4
>> Mesh on surface 1 and 6 will be projected on surface 4. And it can only work if surface 4 is not meshed

[Ad.Y]

Originally Posted by -mAx-

again: delete all volume mesh (also mesh from fluid-5)
Then mesh surface 1 and 6
On your first picture I see a mesh on surface 4
>> Mesh on surface 1 and 6 will be projected on surface 4. And it can only work if surface 4 is not meshed

I got it already. Now I understood where's my mistake.

I checked the meshing on fluid-4 as well, just to check with you, is it the same mesh like on fluid-5? Means this two volumes have independent meshing on its respective fluid volume?

So in order to increase the cell numbers, i need to play with the "interval size" figure? But, if I would like to keep the meshing volume meshing for fluid 2 and 3 but play with fluid 4 and 5. Is it possible? Because I need the whole mesh to be meshed.

I need to remove only the volume mesh for fluid 4 and 5 and continue with what you taught me above. Am I right with this?

What should I do if I need to remain fluid 2 and fluid 3 mesh?

[-mAx-]

if fluid-5 is already meshed, you see that face.5 is common between fluid-5 and fluid-4. That means, you have no more control on the mesh in x-direction (because of face.5).
So for meshing fluid-4, you only have to mesh surface.8
And so on...

[Ad.Y]

Originally Posted by -mAx-

if fluid-5 is already meshed, you see that face.5 is common between fluid-5 and fluid-4. That means, you have no more control on the mesh in x-direction (because of face.5).
So for meshing fluid-4, you only have to mesh surface.8
And so on...

Thank you so much for your patience in teaching me. I will give it a try. Will ask for help again if I face any difficulties.

[Ad.Y]

Originally Posted by -mAx-

if fluid-5 is already meshed, you see that face.5 is common between fluid-5 and fluid-4. That means, you have no more control on the mesh in x-direction (because of face.5).
So for meshing fluid-4, you only have to mesh surface.8
And so on...

I tried to remove only volume mesh for fluid-5, then mesh face-1 & face-6 with pave & interval size of 0.2 then remesh the volume again. Unfortunately, there are some errors pop out and stated that fluid-2 is not exported. Can I know why?

What should I do if I need everything to remain the same except for the meshing on/within fluid-5?

[-mAx-]

maybe you simply didn't mesh fluid-2

[Ad.Y]

Originally Posted by -mAx-

maybe you simply didn't mesh fluid-2

Actually, this mesh is passed to me which is created by an anonymous user.

You meant fluid-2 is not mesh originally before I start editing? But I check with the display attributes with every mesh turned off and turned on only fluid-2 and it showed meshing around that area.

For face-1 and 6, I tried to remesh with the same element and type as previous original one with smaller interval size.

Face-1: element: quad; type: map
Face-6: element quad; type: tri-primitive

However, I only managed to mesh the surface of face-6 but for face-1, I faced an error.

Must it be type of pave? Possible for me to keep to the original meshing type?

[-mAx-]

if you really want to see if all your volumes are meshed, use examine mesh panel.
Indeed, but turning on mesh visibility you may see a yellow mesh which means surface mesh. BUT a gold color means volume mesh.
Anyway the error you get means that face.1 has an edge which is already meshed., so you are no more free to mesh it as your wish

[Ad.Y]

Originally Posted by -mAx-

if you really want to see if all your volumes are meshed, use examine mesh panel.
Indeed, but turning on mesh visibility you may see a yellow mesh which means surface mesh. BUT a gold color means volume mesh.
Anyway the error you get means that face.1 has an edge which is already meshed., so you are no more free to mesh it as your wish

Does it mean that I have to actually remove all the volume meshes and mesh the face meshes one by one? Do you mind enlighten me with the number of face i should mesh accordingly in order to fully mesh this case? In the meantime i will try out myself first. Thanks.

[-mAx-]

if you want such a refinement http://www.cfd-online.com/Forums/ans...tml#post482414
then yes you have to remove all the mesh, because they are "linked" (face mesh projection)

[Ad.Y]

Originally Posted by -mAx-

if you want such a refinement http://www.cfd-online.com/Forums/ans...tml#post482414
then yes you have to remove all the mesh, because they are "linked" (face mesh projection)

What about fluid 2,3 and 4?

On the other side of note, is it possible to do edge meshing instead of face mesh then to volume mesh?

[-mAx-]

*once fluid-5 is meshed, you can also mesh the other.
*you can also mesh edge if you want, but after you have to mesh surface, then volume
If you directly mesh Volume (without meshing surfaces and edges), then gambit mesh them (surface & edge) automatically

[Ad.Y]

Originally Posted by -mAx-

*once fluid-5 is meshed, you can also mesh the other.
*you can also mesh edge if you want, but after you have to mesh surface, then volume
If you directly mesh Volume (without meshing surfaces and edges), then gambit mesh them (surface & edge) automatically

Sorry, I still can't get the this thing right.

I removed all volume mesh. Then I changed the mesh on face-1 with interval size of 0.2, then volume mesh fluid-5 using face-1&6 with inteval size 0.2.

Then surface mesh face-8 with size interval of 0.2 then volume mesh fluid-4 with interval size 0.2.

Then how should I mesh fluid 2 (hex + tet primitive) & 3 (hex + submap)?

[-mAx-]

volume fluid-3 has to be splitted in order to get quick hexa mesh
Untitled3.png

volume fluid-4 will be more difficult (but you meshed it with tetra)

[Ad.Y]

Originally Posted by -mAx-

volume fluid-3 has to be splitted in order to get quick hexa mesh
Attachment 29696

volume fluid-4 will be more difficult (but you meshed it with tetra)

How you should I split it (Split the face or mesh)? Mind teaching me?

Is it fluid-2 or fluid 4 you are refering in reference to fluid-4 stated above?

Then what's the possible way for me to mesh everything correctly with the default elements and type from original mesh? Actually, this mesh is passed to me which is created from an anonymous user. That's why I am having a hard time to refine it.

[Ad.Y]

Originally Posted by -mAx-

volume fluid-3 has to be splitted in order to get quick hexa mesh
Attachment 29696

volume fluid-4 will be more difficult (but you meshed it with tetra)

Max,

I need help in defining the boundary conditions. I got error when I am trying to set the conditions for fluid-2,3,4 and 5 as the entity but others was alright (others using face as entity). But I check and the mesh is actually volume meshed. Can I know why? Thank you.

[-mAx-]

explain what kind of bc did you set on which surface or volume

[Ad.Y]

Originally Posted by -mAx-

explain what kind of bc did you set on which surface or volume

below stated are what I did, using the mesh file attached here.
https://dl.dropboxusercontent.com/u/38924025/Mesh.zip

renaming continuum types: [name -> new name , type]
fluid-2 -> bowl , fluid
fluid-3 -> crevice , fluid
fluid-4 -> cylinder , fluid
fluid-5 -> nearliner , fluid


defining boundary conditions: [name -> face(f)/group(g), type]
blowby -> f11 , wall
cylinderhead -> f4 , wall
cylinderhead:015 -> f8 , wall
default_interior -> f6 , interior
default_interior:019 -> g3 (select volume - fluid-3) , interior
default_interior:020 -> f9 , interior
default_interior:021 -> g2 (select volume - fluid-2) , interior
default_interior:022 -> g4 (select volume - fluid-4) , interior
default_interior:023 -> g5 (select volume - fluid-5) , interior
liner -> f9 , wall
liner:016 -> f13 , wall
piston -> f22 , wall
piston:017 -> f1 , wall
piston:018 -> f14,f15,f16,f17,f18,f19 , wall
symmetry -> f3, f2 , symmetry
symmetry:011 -> f7, f10 , symmetry
symmetry:013 -> f21, f23 , symmetry
symmery:014 -> f12, f20 , symmetry

For boundary conditions, I select "groups" under entity, select the respective volume under group creation.
However, I got error while exporting the conditions that involve the groups entity such as default_interior:019, default_interior:021, default_interior:022 and default_interior:023.

[-mAx-]

you don't need to specifiy interio BC.
Gambit will treat them automatically.
The same with Wall-
Question, where flows your fluid in and out?