Adaptive Time Stepping Courant Number | HEC-RAS has two methods for computing the maximum Courant number used for the adaptive time stepping. One is based on the face velocities while the other is based on the cell outflows and volume (i.e. residence time). The default method is the face velocity method, but in 6.1 there was a bug in which the residence time method is always used no matter what method is selected by the user. | |