Boundary conditions repeating every single cycle (periodic?) -- CFD Online Discussion Forums

July 30, 2015, 13:41	Boundary conditions repeating every single cycle (periodic?)	#1
vExus New Member Join Date: Aug 2013 Posts: 12 Rep Power: 12	Hi! I've encountered a little problem while modelling heat transfer through the piston of combustion engine. One of the BC is supposed to be defined by heat transfer coefficient and free stream temperature. Both coefficient and temperature are crank angle dependant. Data which I own is in the form of pairs [crank angle : coefficient] and [crank angle : temperature] e.g. [0 : 320] [1 : 326] . [720 : 458] and they repeat every cycle (720 deegrees). My question is: how can I input those BC? Should I calculate mean cycle coefficient and temperature and set them as a constant? I thought of periodic boundary conditions, but it looks like they don't work that way. How would You do that? Last edited by vExus; August 18, 2015 at 11:04.

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