fail to perform unite boolean opeation and create enclosure using imported SolidWorks CAD Model

Currently I am working on a project that needs to generate a fluid flow simulation on a cyclist riding a bicycle. I have created the CAD model in SolidWorks. I then went to ANSYS 16.1 and imported the assembly file. After clicking the generation button, it seemed the model was successfully imported (with a green tick next to "import"). Since I was doing the external flow simulation, I need to create a fluid domain, and hence I tried to unite the bodies together first (I am not sure if unite is actually needed), the unite boolean operation came with a warning:


Warning: No overlap or wrong types

Context: Geometry Engine, while generating Feature Boolean 1.


However, since there is a cyclist in my model, and I need to make different configuration of different postures, I must need to use assembly by joining different body parts, and thus there must be overlapping between the body parts.

I tried to continued to generate enclosure, and also tried to delete the Untied Boolean Operation and generate enclosure, but both resulted in failure of creating the enclosure.

May I know what would be the possible fix of this issue? Thanks in Advanced!

I have attached the zip of SolidWorks Model (2018version), as well as the .agdb file (just imported, no boolean and enclosure) in case you could not open SolidWorks.



  • TaeioumTaeioum Member
    edited April 2019

    It seems that I could not upload the zip file, I would put down a dropbox link instead:

  • kkanadekkanade Forum Coordinator
    edited April 2019

    as ansys employees we can not download attachments. please insert images. 

    please upgrade to r19.2. we support only two previous versions. 

    please go to tools - analysis tools - fault detection and check if geometry has any errors. if it has any errors then it may fail in boolean oeprations. 

    please remove errors and try again.

  • TaeioumTaeioum Member
    edited April 2019

    Thanks for your reply. I am sorry that I didn't know the rule that employees cannot download attachments. 

    I afraid that r19.2 may not be available for me, since 16.1 is the only version that my school has a license of. 

    Nonetheless, I would post the images of my model. Please Help me if you are available.

    1. My model in SolidWorks:


    2. Model imported in ANSYS:


    When I tried to unite all bodies, warning occurred. It occurred in between pedal and feet. These are the image of the problematic geometry (only one location is shown):


    Also, another problematic geometry appeared when I attempted to unite the calf, thigh and body. It occurred at the joint between body and thigh.

    The Unite boolean operation:


    Problematic Geometry (again, several images for only one position):


    I hide other irrelevant bodies:


    Please see if you could help. Thanks a lot.

  • RobRob UKForum Coordinator
    edited April 2019

    You probably have a small gap between the bodies. Can you do the unite & enclosure part in Solidworks (if you're more familiar with that tool) and then read the fluid volume into DM from there? 

  • TaeioumTaeioum Member
    edited April 2019

    Thanks for your advance. It seems that let SolidWorks to do the job is a better approach than using DesignModeler in ANSYS. I will take this. Thanks a lot.

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