Learning Forum

[ahmed335]

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.

 

[DrAmine]

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

[ahmed335]

[DrAmine]

The geometry does not look axis-symmetric. 

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

[ahmed335]

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

[DrAmine]

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

[ahmed335]

sorry ,  you asking me to zoom the inlet region ?

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

[DrAmine]

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

[ahmed335]

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