2D Mesh – Mapping T&T

2D Mesh Breaklines

In the Viewing the Results post, we saw the neat Particle Tracing feature in RAS Mapper, which us to easily visualize the movement of water. However, if we look closely enough, things look a bit strange. The particles seem to be going straight through that road embankment (The Priority bus Route) as if it doesn’tContinue reading “2D Mesh Breaklines”

Boundary Conditions – Normal Depth

From the previous post, we saw that water was not leaving the model, causing a build up of water at the downstream end (although the downstream end is the Caroni Swamp where we expect water to be). To fix this, we add a Boundary Condition Line at the downstream end of the model. in RASContinue reading “Boundary Conditions – Normal Depth”

View Results

Now for the fun part! Now that we have successfully run the RAS model we can take a look at the results. This is easily done in RAS Mapper, which has several different options for viewing the spatial results. Under the Results section, the ShortID of the event if shown along with Depth, Velocity, andContinue reading “View Results”

Create the Plan and Run the Model

The Plan file contains the settings used to run the model such as the simulation window, what time steps to use, and what equation sets to use. The main things that we will do for now is ensure that the geometry and Unsteady Flow files are associated, and enter the Simulation Time Window. Here IContinue reading “Create the Plan and Run the Model”

Create a Mesh

The mesh is what makes it a 2D model. Read the RAS documentation to learn more about the properties of the 2D mesh including computation points and cell faces. In a 1D model, rivers are modelled using cross-sections across the floodplain, distributed along the river. In a 2D mesh, I think to think of theContinue reading “Create a Mesh”