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The following steps introduce how to create a Creating a grid is a straightforward process. The important principle is that for each grid, at least four splines are needed. The splines should intersect each other at only point and the splines in the same orientation should not intersect each other. Follow these steps to create a simple grid:

1. From the Splines menu, select Draw a New Spline or click on the Add a new spline button from the main menutoolbar (1149927666).
2. LMC to start drawing a spline, and RMC to end drawing the spline. Two first splines need to be done.The last two splines are drawn along the sides of the domain and Draw a second spline close to parallel to the first spline.
3. Next, draw two more splines along each end of the domain. These two splines must intersect the previous two splines (Figure 11149927666)
4. RMC on the Splines layer in the Layer Control panel, then select the Create Grid... option  option or click on the Create Grid from Splines button from the main menutoolbar, as shown in Figure 21149927666
5. Create Grid from Splines form will pop up as shown in Figure 3 1149927666. From this form, the number of grid cells between two splines needs to be defined by entering a number of cell cells in the I and J directions (default values are 4). The values input for Growth Factor will define the spacing distance for nodes of the grid, with default values (zero), nodes are distributed evenly in I and J directions. Figure 4 show examples for 1149927666 shows an example of the grid generated.

Figure 1. Draw splines procedure.

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Figure 2. Create Grid from Splines.

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Figure 3. Create Grid from Splines.

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Figure 4. Define the number of grid cells.

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Figure 4 5. An example of the generated grid.