13 Replies Latest reply on Jun 3, 2008 4:45 AM by Leith Simpson

Placing "LID" in the model.

robi roy Jun 30, 2007 3:50 PM

Hi,
I am trying to simulate simple fluid flowthrough pipe. so I model a pipe using solidworks. But when I openit in Flow work , a 3-D Cubical volume is considered forcomputational domain. I have chosen the "internal" optionbut still not able to get rid of the outside volume. Automatic meshis created for the whole cubical volume.
I would appreciate any kind of help.

Thanks,
Robi

Placing "LID

1-5YT7VZ Feb 8, 2008 12:00 AM (in response to robi roy)

Are you still there, Lids are just parts that are drawn on all openings , half in, half out.
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Reid Hayashi Feb 12, 2008 2:15 AM (in response to robi roy)

I also intially was quite confused about lids. I was also annoyed that none of the "online" documentation/help did not fully explain lids. What you need to do is create a part "lid" that will be able to close off (without gaps) the openings of your pipe. For example if your pipe is 3 inches in diameter, create a lid that has a diameter of 3inches also. then create an assembly with the lids closing off the pipe openings. Hope this helps.
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  Simon Oldfield Feb 12, 2008 9:10 AM (in response to Reid Hayashi)
  
  Is there no feature for adding "lids" if not they really should consider this as its a pain having to cap everything off, even with FlowWorksXpress.
  
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    Basil Gello Feb 12, 2008 6:59 PM (in response to Simon Oldfield)
    
    Simon,
    that's a great idea for the next ER! It would be really useful improvement
    
    Regards, Basil
    
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      1-5YT7VZ Feb 19, 2008 8:51 PM (in response to Basil Gello)
      
      Just to let you know, they added a lid feature to 2008 under tools
      
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        Basil Gello Feb 20, 2008 8:16 AM (in response to 1-5YT7VZ)
        
        Bill,
        
        Really... I do not use that toolbar so much so I have missed that button
        
        Regards,Basil.
        
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        1-5YT7VZ Feb 20, 2008 10:21 AM (in response to Basil Gello)
        
        Its under the floworks pull down tab. There is a tools option, look there. I am not running 08 myself but they show casted it when they did "What's new with 08"
        
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        Rich Bayless Feb 21, 2008 7:30 PM (in response to 1-5YT7VZ)
        
        Cool, I tried the lids command in floworks 2008 and it worked. I selected adjacent faces and then it created lids. didn't look like much thickness to the lid, so it looks different than the lids created following the 2007 training manual.
        
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        1-5YT7VZ Feb 21, 2008 8:39 PM (in response to Rich Bayless)
        
        I knew that the "What's new in 2008" night would come in handy. Glad I could help.
        Bill
        
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Placing "LID

David O'Lone Apr 14, 2008 7:49 PM (in response to robi roy)

I'm having some trouble with lids too...I am getting an error when I try to set the boundary conditions: "Face <1>@InletOutlet-1 is not laying on the boundary between solid and fluid region."
Is this because my lids are assembled to the test part incorrectly or because my test components have not been defined correctly??

Thanks in advance!
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  1-5YT7VZ Apr 14, 2008 8:27 PM (in response to David O'Lone)
  
  David,
  
  First off, are you clicking on the inside faces? Also, go to floworks, tools, Check Geometry. Run the check, it should give you a fluid volume greater than 0. If it is zero than chances are that your lids are drawn wrong or you are missing something.
  
  Bill
  
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    Leith Simpson Jun 3, 2008 3:01 AM (in response to 1-5YT7VZ)
    
    Yeah I had the same error but thanks for the tip found out my solid volume was zero now I just have to work out why that is. Will let everyone know when I do else someone could sugest a reason.
    
    Regards
    
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      Leith Simpson Jun 3, 2008 4:45 AM (in response to Leith Simpson)
      
      Ok I think I solved the problem I don't know why it gave the error it did but what solved it was removing the sub assembly. Maybe it was the model geometry that caused the problem i.e. small voids or not correctly meshing parts or maybe FloWorks 07 just can't handle sub assemblies I don't know but it was one or the other.
      
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