1D/2D Offline Connection Issues

Written by Chris Goodell | Kleinschmidt Associates Copyright © The RAS Solution.  All rights reserved.  I’ve mentioned this before, but I am thoroughly impressed with the robustness of the finite volume solution scheme used in 2D areas in HEC-RAS.  As long as your Courant Numbers are in a good spot, you rarely get errors and instabilities in […]

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My Unsteady HEC-RAS Model is Unstable…Why?

This question (or some variation of it) comes up quite a bit on The RAS Solution:  “I have an unsteady flow model.  When I run it, it goes completely unstable.  What is causing this?”  Many times a screen shot of the computation window with the dreaded “red bar” is attached. While the person asking the […]

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