CFD terminologies

Betty

Could anyone please give some basic idea on how to interpret the following : " It takes 14.8 Cray CPU seconds per iteration, or 7x10^-5 ~ 1.0x10^-4 CPU seconds per point and per iteration, and the results are obtained in the order of 1000 to 2000 iterations. The preliminary solution structure emerges after about 1000 iterations with CFL number of O(0.1) and it takes another 1000 iterations to have the solution fully settled." My questions are: If I have a simple cube as the computational domain with say grids like (x y z)=(90 81 35) and side = 10 inches and say there is a 0.5 inch diameter jet at X=5 on the YZ-plne and I want to solve for pressure and velocity on the last face (YZ plane at X=10). For this problem

How is the time per iteration calculated?

How will I know in how many iterations results will be obtained?

How will I know the solution is fully settled?

Kindly give some basic idea on how I would appreciate any references that would put things in perspective.

Thank you all for your time. Sorry about the length of the post. But please please help.

Betty