Simulations with Moving Water Levels


Assignment :

Finish Reading Assignment 2 on the ANGEL page for this class.

One major weakness of discrete approximations to flow equations such as the finite volume method is that they don't deal well with solutions that are basically discontinuous.  In two-phase flow a common example of this situation is the surface of a liquid (or largely liquid) region moving through a region originally occupied by gas.  This occurs frequently in reactor transients.  A good description of the problems encountered with moving liquid levels can be found in Chapter 2 of a PhD. thesis by Birol Aktas.  I will diiscuss the types of test problems described in the thesis, and the behavior typical of reactor saftey codes.  I will also discuss behavior that can be expected if a good level tracking algorithm is employed.  Results of employing a special level tracking method can be seen in Chapter's 3 and 4 of the thesis.


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