The MAC Method

Maciej Matyka

Hello everybody. At first - sorry for my pure english.

Im Polish student of Physic at University of Wroclaw. Im beginner in CFD, but im learning. Im working 2d program to simulate fluid motion. My C code base on algorithm presented in "The MAC Method for incompressible, viscous..." by Harlow, Welch (1965 Los Alamos). In general - program is finished, but didnt work correctly. I cannot change general algorithms myself, becouse i didnt understand 100% of that technique (e.g. pressure relaxiation). Anyway, my questions are:

1) Anybody work with algorithms prescribed in that Harlow's and Welch paper?

2) If yes - have you problems with that algorithm? Maybe there are some part missing???

3) I have also problems with free surface calculations, and boundary conditions (not described in that paper). At the moment im interesting only in NOSLP walls (i just wanna run that program to satisfy me at the moment - not solving complicated problems).

thanx, and sorry if i do anything wrong - its my first mail on that forum, i believe you undersand me

Maciej Matyka

ps. I spend lot of my time on that program (~4 months) and i cannot finish that program. help me if anybody work with that methods...