Thanks Luca for your prompt response!
Here are the command lines I used:
vmtksurfacereader -ifile /Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct.vtp
--pipe vmtkcenterlines -seedselector openprofiles --pipe vmtkflowextensions
-adaptivelength 1 -extensionratio 20 -normalestimationratio 1 -interactive 0
-extensionmode boundarynormal --pipe vmtksurfacewriter -ofile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2.vtp
vmtksurfacereader -ifile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2.vtp --pipe
vmtkcenterlines -endpoints 1 -seedselector openprofiles --pipe
vmtkdistancetocenterlines -useradius 1 --pipe vmtkmeshgenerator
-elementsizemode edgelengtharray -edgelengtharray DistanceToCenterlines
-edgelengthfactor 0.3 -boundarylayer 1 -ofile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2.vtu
vmtklineartoquadratic -ifile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2.vtu -ofile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q.vtu -rfile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2.vtp -entityidsarray
CellEntityIds
vmtkmeshscaling -ifile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q.vtu -scale 0.1 -ofile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q_scaled.vtu
vmtkmeshboundaryinspector -ifile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q_scaled.vtu
-entityidsarray CellEntityIds
vmtkmeshtetrahedralize -ifile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q_scaled.vtu -ofile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q_scaled_t.vtu
vmtkmeshlinearize -ifile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q_scaled_t.vtu -ofile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q_scaled_t_l.vtu
vmtkmeshwriter -ifile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q_scaled_t_l.vtu
-entityidsarray CellEntityIds -ofile
/Users/Vincent/Desktop/CFD/Temp/level_sets_sm_ct_ex_2_q_scaled_t_l.msh
And I am currently using MacOS 10.8.3 and my laptop is a 2.7GHz quad-core with
16GB ram. And I am using ANSYS 14.0.
Please kindly advise on what steps should I follow for subsequent processing.
Many many thanks indeed.
Vincent
On Apr 12, 2013, at 3:56 AM, Luca Antiga <luca.ant...@gmail.com> wrote:
> Hi Vincent,
> for the future please keep messages on the list. I'm not the only
> one that can solve your problem, by posting on the list you have
> better chances to get useful feedback in shorter times.
>
> Hey, relax! No need to be desperate. Things can be tricky at the
> beginning as there is a learning curve, but you'll be ok soon.
>
> I personally don't think the model is odd. The orientation of
> the flow extensions is debatable (vmtk tries to take a representative
> direction of the vessel upstream the end section, but it can generate
> non particularly representative extensions in the case there are
> high curvatures near the end section, as in your case). You can
> try with
> -extensionmode boundarynormal
> for extensions that have the direction of the normal to the boundary,
> and see what happens.
>
> In any case, I don't think the direction is odd enough to cause troubles,
> so let's see the mesh. Can you send me the exact command line you
> used to generate the mesh all the way to the generation of the msh
> file?
>
>
> Luca
>
>
> On Apr 12, 2013, at 8:45 AM, Vincent Ip wrote:
>
>> Thanks Luca,
>>
>> I almost cried when I saw your email. You have no idea how desperate I am
>> right now.
>> Alright, I've attached a picture of what did I mean the model is odd after
>> adding the flow extension.
>> Please kindly comment.
>> Many thanks!!!
>>
>> Vincent
>>
>> <PastedGraphic-1.tiff>
>> On Apr 11, 2013, at 11:36 PM, Luca Antiga <luca.ant...@gmail.com> wrote:
>>
>>> Hi Vincent,
>>> welcome to vmtk.
>>> In order to help you we need some more information about what's the actual
>>> issue you're coming across. Let's start with your first question: can you
>>> post a screenshot?
>>> Cheers
>>>
>>> Luca
>>>
>>> On 12/apr/2013, at 08:15, Vincent Ip <drvincen...@gmail.com> wrote:
>>>
>>>> I am a new beginner in learning how to reconstruct blood vessel from MR
>>>> angiogram source image for CFD analysis.
>>>>
>>>> I followed the VMTK tutorial step by step to reconstruct the middle
>>>> cerebral artery and then export it to mesh for FLUENT. But it just doesn't
>>>> work!
>>>>
>>>> I have a few questions that I don't understand and I really hope someone
>>>> could show me some guidances (I'm really desperate!!)
>>>> - After adding the flow extension, the mesh seems a bit odd and it doesn't
>>>> look like the one which is depicted as an example on the page of
>>>> 'generating a mesh'. Is it really necessary to make it or anything I
>>>> missed to do during the meshing
>>>> - And the *.msh file generated (for Fluent) is not readable by Fluent
>>>> - I tried the netgen way but I don't know how to use it
>>>>
>>>> I am not sure what did I do wrong but I would appreciate if anyone could
>>>> advise me on how to generate a proper CFD model from MRA.
>>>> Many thanks in advance.
>>>>
>>>> Vincent
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>
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analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
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