Mesh in Hypermesh, solving in AcuSolve

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hello everybody,

 

i have the following problem. I generated the CFD - Mesh (quater of a pipe) in HyperMesh (as you se below) and exported it to AcuSolve ( file type: .inp and .asm).

<?xml version="1.0" encoding="UTF-8"?>image.thumb.png.931c984f8e85bcb492456d830896868a.png

 

In AcuSolve i set the following parameters / Boundary Conditions:

Inflow: Average Velocity: 0,2 m/s

Outflow: Pressure: 0

Wall: Wall Condtion, with standrad Wall function

Sym_xy: Boundary Conditon Symmetry

Sym_xz: Boundary Conditon Symmetry

CFD_tetcore001: Material = Water

 

Problem Discription:

image.png.6fecdd62dd71edc65d53970a1648b5d3.png

 

Auto Solution Strategy:

image.png.4670e4c0966f5199afd84a8c9ca3ad43.png

 

When i start the simulation, the results have nothing to do with reality.

 

There should be a preesure drop from inlet to outlet around 15-16 Pa.

 

But this are the results: <?xml version="1.0" encoding="UTF-8"?>image.thumb.png.7b0ff576ca1d8d645a641addd2f74663.png

 

 

But the thing i don't understand is, if i build the model completly in AcuSolve, i get the right result by 5 percent deviation.

 

When i start the simulton in Hypemesh a always got this warning:  'WARNING: Multiple command issius'

Or i got the wron results.

 

Please,  could you help me

 

Thanks

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2018

    I got the Answer from the support. The Dimensions weren't right. I build die model in NX11.0 and importet it in HyperMesh. So die Unti was 'mm'. After i scaled the model. I got the right results.

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