Any Floworks users out there who want to share knowledge ?

Discussion created by Alessandro Tornincasa on Jan 9, 2007
Latest reply on Feb 7, 2008 by 1-5YT7VZ

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Hi,
any COSMOS Floworks users there who want to share knowledge of this amazing software ?

One topic could be this one: how's your experience with rotating components problems ?

For example: what's the fastest approach in your opinion to study a pump ? Would you a rotating region thorugh a dummy component ?

Anyway Floworks has a nice pdf tutorial in the installation folder which covers a wide variety of topics.

Alessandro Tornincasa

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7 Replies

David Arthur Jan 10, 2007 5:46 PM
I've used Floworks quite a bit, but I haven't used rotating flow regions at all. I can't be of much help with that.
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1-7BHGHF Jan 19, 2007 5:32 PM
sorry, i haven't used it for rotating components. i need info onhow to get floworks to run off of a cluster of processors. i'm notsure if this is possible yet, or has been accomplished to any levelof success. products like fluent, and usm3d etc. all solve jobsdistributed across many processors. as far as i know, floworks canonly solve one job per processor. this severely limits floworkscapability. can you provide any help/comments?
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- Chris Michalski @ 1-7BHGHF on Feb 8, 2007 10:57 AM
  Floworks will only solve one simulation per processor at a time,but you can run multiple processors at once, just run a batch solveand increase the # of processors selected - biggest issue isif they are in separate machines on a network each box needs alicense in order for you to access its processors
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  - Robin Boudreault @ Chris Michalski on Apr 23, 2007 5:02 PM
    I cannot select some components as a rotating region and I amwondering why, they are revolved parts
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    - 1-5YT7VZ @ Robin Boudreault on Feb 7, 2008 11:37 PM
      You need to create a part that represents the area that is spinning. This has to include all parts that are rotating. But does not need to be tight to the size. A fan would have a cylinder that completely covered all spinning items. In the component control section you must turn this part off. Then it will allow you to use it as a rotational domain.
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Jacob Pelletier Apr 10, 2007 4:49 AM
I've found the rotating reference frame option to be failrlylimited, or... I just don't know how to use it properly. Forexample, lack of transient analysis and the axisymmetric boundarycondition at the edge of the rotating region means you can'trotating components exposed to crossflow freestreams.. I'vehad better luck with the global rotating reference frame andsimplifying my models.

In another area, the biggest issue I am facing is connectingfloworks results to cosmosworks. For example, if I model aflat plate, held perpendicular to a uniform flow of 64m/s, floworkscalculates a total force of 500Newtons. When I export thepressure results to cosmos and run a static analysis, cosmos givesa reaction force at the simple supports of 13 Newtons. Theyshould be the same, what's wrong?
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- David Arthur @ Jacob Pelletier on Apr 12, 2007 12:16 PM
  Jacob,
  I assume this is an external flow analysis. How are you measuring force in floworks? Selecting only the face directly exposed to the uniform flow to measure force will give you a high reading because it wont account for the atmospheric pressure acting on the rear of the plate. Of course, this is purely a guess.
  
  David
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Any Floworks users out there who want to share knowledge ?

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