Structured Mesh in 3D in Ansys workbench

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deshverma123 posted this 23 January 2019

 hi i everyone, i need to generate a structured mesh around a conical geometry in  3D in workbench for CFD simulation in ansys fluent.

Please! can anyone help me how to do it.

seen tutorials for it but all of them on youtube are for 2D only, can anyone help to do it in 3D.

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kkanade posted this 24 January 2019

please insert images of your geometry. 

deshverma123 posted this 5 weeks ago

the cone is inside the fluid domain

deshverma123 posted this 5 weeks ago

rkumbhar posted this 5 weeks ago

Hi,

You can slice geometry in three parts as shown in this image. Create share topology between the parts. All three parts can be meshed using Sweep method.

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kkanade posted this 5 weeks ago

Or you can try multizone method without slicing. 

if this helps you, please mark this post as 'is solution' to help others on forum.

 

 

 

 

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deshverma123 posted this 4 weeks ago

no sir it didn't helped at all. Please don't suggest youtube tutorials, I have already checked them all.

deshverma123 posted this 4 weeks ago

i have split face on all side and tried multizone the error comes up as

error comes when i do multizone

MultiZone found free block in swept body.

A mesh could not be generated using the current meshing options and settings.

 

 

deshverma123 posted this 4 weeks ago

the geometry is in 3D so please could be mode precise on how to split those face, even though i tried split on some of the faces. 

kkanade posted this 4 weeks ago

please split body in half so that each half will get half circle face of the inner geometry. 

then use multizone. 

deshverma123 posted this 4 weeks ago

 

sir i made split as you suggested but i am getting same error message again and again "MultiZone found free block in swept body.

sir can you tell me why this error is there and can it be resolved.

kkanade posted this 4 weeks ago

split body. 

i think you have split only face. 

deshverma123 posted this 4 weeks ago

sir can you please suggest any tutorial to split body in design modeler. 

kkanade posted this 4 weeks ago

deshverma123 posted this 4 weeks ago

sir as you instructed i had split the body in half and applied multi zone method and edge sizing on the upper and lower half circles of the geometry. sir please guide me through further steps to generate structured mesh

kkanade posted this 4 weeks ago

if this hex mesh then this should be good enough for cfd simulation. 

if that is the case, please mark this thread as 'is solution' to help others on forum. 

deshverma123 posted this 4 weeks ago

sir but now i have two inlets what to do about it.

 

kkanade posted this 4 weeks ago

you can merge them in fluent. 

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peteroznewman posted this 4 weeks ago

In DesignModeler, you can pick the two bodies in the outline, click the RMB then select Form New Part which will put the two bodies into a single part. In meshing you can pick the two faces that are the inlet and click the N key to create a Named Selection and name it Inlet.  Fluent will then show you one inlet BC.

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ANSYSRUSHI posted this 4 weeks ago

 I did a rough geometry resembling your geometry and tried generating the HEX mesh on the body with conical cavity and other with conical body. I got the hex mesh on it. Please check for small facess or edges which may be hindrance in generating the structured mesh

1. Geometry I used

2. Mesh generated (HEX MESH)

Mesh Image using Multizone mesh and conical bosy in rectangular solid

 

Mesh Image using Multizone mesh and conical cavity

 

 

If still the problem persist share me the stp file i will give a try for the mesh

deshverma123 posted this 4 weeks ago

thanks for giving your time,

i got the same kind of mesh when i tried meshing on a small domain around the conical geometry but when switched to my actual size domain meshing turned up pretty ugly then i asked help here but still can't get smooth refine mesh which will give accurate results during CFD simulation

sir, you made the geometry correct but the only issue was the size , it's too small.

really appreciate your help and generosity

i will send you the stp file 

deshverma123 posted this 4 weeks ago

sir i tried to send you stp file by attaching the file but error comes FILE EXTENSION NOT SUPPORTED, I also tried by compressing the file and then attaching it but same error.

Is there any other way i could send those files to you??

rwoolhou posted this 4 weeks ago

Reduce the minimum cell size or review the curvature size function settings. The default aren't always perfect as they depend on the domain size so smaller features can be overlooked.  

peteroznewman posted this 4 weeks ago

deshverma123, if you put the .stp inside a .zip file, you are allowed to attach .zip files as long as the file size is < 120 MB.

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ANSYSRUSHI posted this 4 weeks ago

Yes, you can mail it by uploading it in google drive and send me or if it is possible to send by zip file it will do. My email address is rushikeshattarde@gmail.com

deshverma123 posted this 4 weeks ago

geometry file

Attached Files

deshverma123 posted this 3 weeks ago

i have used face meshing and inflation on the two surfaces of the cone in the fluid domain

this mesh was generated 

the problem is with mesh on the top of the cone, it's not desirable

can  anyone help me to fix that

 

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