I agree with Bob Dickinson that the I1 data was missing - after I put
YourĮrror will go down if you crank these down although the model may take a The manual recommends bet 0.001-0.005 for both. It looks like yours is set to 1 rightĬheck your simulation tolerances as well (SURTOL and SURJUN) for flow and Typically I have seen this value bet 50-100. Reducing your time step even more (say 1 or 2 sec).Īlso, you may want to check the maximum # of iterations (ITMAX) and Your output file shows thatįor Conduit# HCT9005L, the Courant time step was 5 sec. The model will have a greater degree of stability if youĬhoose a timestep =< the Courant Time Step. Length of the shortest conduit (the limiting factor in your modelīasically).
Extran does not like negative slopes so also take a look forĪny neg slopes (HCT9005L) and simply redefine the conduit for a positiveįurther, the courant time step is the time it takes a wave to travel the The length of your simulation in order to "get all of the water out" of Your output file shows that you haveīackflow in a majority of your conduits. Continuity error is computed on a junction by junction basis and thenĪveraged over the entire system.
0 kommentar(er)
