beyond physics results
 

Hi,

I am trying to simulate some elbows. R134a saturated, 250kPa at inlet, 7.9kg/s at outlet. 10in die inlet, 6" dia outlet. Mesh with autocorrect, pretty fine.
What I get is 70 000m/s at subsonic flow, pressures of -420MPa at compressible flow, and the gas turns to liquid and back. 5 or 20 iteration, no difference. So, what did I do wrong?

http://i212.photobucket.com/albums/c...ps2e4b3e98.jpghttp://i212.photobucket.com/albums/c...ps41afc61f.jpghttp://i212.photobucket.com/albums/c...psf1c4e941.jpg