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Investigation of mixing zones subject to thermal fatigue

Posted: Sat Sep 05, 2009 1:34 am
by Alexandre Douce
Thermal fatigue is an important subject in the life-time management of piping components. For example, in T-junction, high frequent temperature fluctuations as a result of mixing of the hot and cold fluids may cause material degradation.

Code_Saturne is used to compute the fluid flow with a L.E.S. model, which gives access to the instantaneous temperature fluctuations. Code_Saturne is coupled to the finite element thermal code Syrthes, which propagates the temperature fluctuations into the wall thickness. Then, the instantaneous temperature field inside the wall is transfered to EDF thermomechanic tool Code_Aster, to perform mechanical computations that yield the instantaneous mechanical stresses seen by the T-junction and the following elbow.

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http://www.youtube.com/watch?v=GDgTwadkJ50

Re: Investigation of mixing zones subject to thermal fatigue

Posted: Fri Sep 11, 2009 9:53 pm
by Alexandre Douce
an article is avaliable here