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Getting Started
The following is a list of guides on how to prepare the input files, run the simulations and read the results.
In the following examples we use matlab for the file preparation. These guides assume familiarity with matlab. In some cases we take advantage of the powerful ways that data can be organized in structures. The matlab code is given without explanation on the matlab commands.
There are two support main structures for the velocity data. The CLOUD structure and the MESH2D structure. The CLOUD structure assumes that the velocity data points is a cloud of points. The MESH2D structure assumes that the velocity points are defined on a finite element mesh or grid structure.
ℹ️Note
The MESH2D can be used for the cases where the 3D mesh is created by extruding in the vertical direction a 2D mesh.
The input data depend on the structure type. Here we have grouped the data preparation into these two categories
First we have prepared an example that shows how to prepare the input files for a simple hypothetical domain where the velocity data are not derived by a numerical simulation code but from a random noise.
The first example shows the preparation of input files for the CLOUD and MESH2D with NODE and ELEMENT interpolation
The second example focuses on the FACE interpolation with MESH2D
The data preparation is slightly different depending on the number of processors used.
For the MESH2D structure type Ichnos supports three types of interpolation.
- Element The velocity is constant within the elements
- Node The velocity is defined on the corners of the elements
- Face The velocity is defined on the faces of the elements.
Among all interpolation options that are available at Ichnos the FACE interpolation is probably the most difficult to prepare. It is highly recommended to go through the Simple Face Example before delving into the following Modflow based example
- Hypothetical Modflow This example is based on a hypothetical modflow simulation and shows how to read the Modflow velocity and prepare the Ichnos input files.