vortex tube 2D axisymmetric swirl

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  • Last Post 16 February 2019
ahmed335 posted this 10 February 2019

hi there,

while simulating  the swirl and temperature difference in the vortex tube in the 2D model 

the temperature seems to be constant and wrong despite enabling the energy equations with density-based solver

with  pressure based solver the console reported that the dot product is zero for some node and then it  stopped working 

i made the velocity vector tangential and used the ideal gas properties.

 

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abenhadj posted this 10 February 2019

Please insert screenshots of mesg, boundary settings and anything which might help us to help you. We do not download any attachments, though.

Best regards,

Amine

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ahmed335 posted this 10 February 2019

abenhadj posted this 11 February 2019

The geometry does not look axis-symmetric. 

I would rather use Pressure based solver for this kind of low-Mach-number flows.

Best regards,

Amine

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ahmed335 posted this 14 February 2019

I read many articles where such problem was solved with way ( 2D axisymmetric swirl) . even with pressure based solver is activated the program stops after adding the tangential component =1 , reporting that the dot product of the area and the flow direction in node 1 is zero

 

from manual

abenhadj posted this 14 February 2019

Your geo. Is not axisymmetric.  Please add zoom of inlet region.

Best regards,

Amine

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ahmed335 posted this 14 February 2019

sorry ,  you asking me to zoom the inlet region ?

can you tell me what to do to make it axisymmetry ?

abenhadj posted this 15 February 2019

The geometry you are referring to is not axis-symmetric: You have that tangential inlet which is not evolving around the axis.

Best regards,

Amine

ahmed335 posted this 16 February 2019

I changed the geo to 3d pressure based , but it doesn't work
Error floating point exception

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