fuction for ddt(n) which n is normal surface vector -- CFD Online Discussion Forums

April 11, 2011, 06:34	fuction for ddt(n) which n is normal surface vector	#1
mrshb4 Member Mohammad.R.Shetab Join Date: Jul 2010 Posts: 49 Rep Power: 15	Dear Foamers I'm writing an acoustic code for dynamic mesh case in a centrifugal fan. I use turbDyMFoam with movingWallVelocity BC at blades. In one of the terms of this code, ddt(n) is needed, witch n is the normal vector of the blade surfaces that move around. I know the functions for normal vector of the patches but for its time derivative I don't know how to calculate them. Another question is, Is there any function that could calculate velocity of the faces of the blade (which use dynamic mesh dict and movingWallvelocity) ?! Thank you Mohammadreza Shetab

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