Reference Frame - Mesh Motion

Junta_20361
Junta_20361 New Altair Community Member
edited October 2020 in Community Q&A

Hello experts,

 

I am working with AcuSolve tutorial Acu-5000 and Acu 5001. which are using the same model, difference is one is steady state/reference frame and other is transient/mesh motion.

 

I am wondering which one should i use to represent the rotation of fan-blades? reference frame or mesh motion? and why?

(image below)

 

Thank in advance!

  image.png.9cda0bcae772e26ce40a3b97f3b0aa5f.png

 

 

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Answers

  • acupro
    acupro
    Altair Employee
    edited May 2019

    They both represent rotation.  The reference frame is for steady-state, and the mesh rotation is for transient.  While in some cases the steady-state assumption with reference frame is very good, typically the accuracy with mesh motion will be better.  Of course, the transient simulation takes much more run-time, so that is the trade-off - increased accuracy at the cost of longer runtime.

  • Junta_20361
    Junta_20361 New Altair Community Member
    edited May 2019
    Altair Forum User said:

    They both represent rotation.  The reference frame is for steady-state, and the mesh rotation is for transient.  While in some cases the steady-state assumption with reference frame is very good, typically the accuracy with mesh motion will be better.  Of course, the transient simulation takes much more run-time, so that is the trade-off - increased accuracy at the cost of longer runtime.

     

    Very detail answer.

    Thank you very much! :D/emoticons/default_biggrin.png' srcset='/emoticons/biggrin@2x.png 2x' title=':D' width='20' />

     

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