The default Courant number of 5 will be used for this part of the calculation, but it will be increased later to speed up convergence after the solution has progressed a little.
Stopping criteria allow you to specify for how many iterations the simulation will run. To set a stopping criterion, open the Stopping Criteria node and then select the Maximum Steps node.
Set the Maximum Steps property to 300. The solution will not converge in this number of iterations, but you will change some solver parameters a little later. The solution will not run for more than 300 iterations, unless this stopping criterion is changed or disabled.
Save the simulation.