Re: [vmtk-users] Beginner question
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Re: [vmtk-users] Beginner question
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From: Vincent Ip <drv...@gm...> - 2013-04-12 17:01:35
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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 <luc...@gm...> 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 <luc...@gm...> 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 <drv...@gm...> 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 >>>> ------------------------------------------------------------------------------ >>>> Precog is a next-generation analytics platform capable of advanced >>>> 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 >>>> _______________________________________________ >>>> vmtk-users mailing list >>>> vmt...@li... >>>> https://lists.sourceforge.net/lists/listinfo/vmtk-users >> > |
