# 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.

**Maintained by John Mahaffy : jhm@psu.edu **