SWMM56

Subject:     Link   Iterations  in the  SWMM   5   Dynamic   Wave   Solution   Each of the links in the  SWMM   5  network can use up to 8  iterations  to reach convergence during a time step in the  dynamic   wave   solution  of  SWMM   5 .  The rules governing the number of  iterations  are:   1.        A minimum of 2  iterations  per time step with the 1 st  iteration NOT using the underrelaxtion parameter of 0. 5  (Figure 1) 2.        If both the downstream and upstream nodes are converged then the  link  drops out of the iteration process during the time step (Figure 2) 3.        The number of  iterations  for each  link  can vary over the simulation from 2 to 8 depending on how fast the flow is changing.   Figure 1.   A minimum of two and up to eight  iterations  per time step in the  SWMM   5   dynamic   wave   solution . Figure 2.   The number of  iterations  for each  link  vary through out  the simulation with less  iterations  being used for const...

Subject:    Link Iterations in the SWMM 5 Dynamic Wave Solution Link Iterations in the SWMM 5 Dynamic Wave Solution by  dickinsonre Subject:    Link Iterations in the SWMM 5 Dynamic Wave Soluti on Each of the links in the SWMM 5 network can use up to 8 iterations to reach convergence during a time step in the dynamic wave solution of S WMM 5.  The rules governing the number of iterations are: 1.        A minimum of 2 iterations per time step with the 1 st  iteration NOT using the underrelaxtion parameter of 0.5 (Figure 1) 2.        If both the downstream and upstream nodes are converged then the link drops out of the iteration process during the time step (Figure 2) 3.        The number of iterations for ea...