5-12. The most direct approach is to use a coordinate system that is fixed on the ground at the
release point. Thus, Equation 5-25 is used with Equation 5-27. This gives,
Note that ut is the location of the center of the puff.
In order to reduce the number of spreadsheet cells, use a spreadsheet grid that moves with
the puff center. Use, let’s say, 50 cells on either side of the puff and specify a cell
The procedure is the following: