# Tools

Even though Paraview provides plenty of analysis tools, the **aerodynamicists ** often require some **specific tools**: they are provided by Epsilon.

• Distribution of integrated aerodynamic parameters (lift, drag, exergy, anergy) along some axis (chord, span).

• Mapping 3D data into a plane (integration method).

• Poisson solver.

### Distribution of integrated aerodynamic parameters

The most typical aerodynamic analysis is to plot the distribution of a certain parameter along the chord or span of a body.

Since lift, drag and exergy are **integral quantities**, this kind of plot requires first performing a plane integral at several stations and then to plot the integrated values along the desired axis. This is achieved by the **automatic integration tool** provided by Epsilon.

In order to do that, a survey plane is created and the desired positions of the plane are defined:

Then, the tool performs an automatic integration at each position and hence the output can be plotted along the sweeping direction:

The integrated data can be plotted superimposed to the 3D geometry as shown in the previous images or, more classically, in a 2D plot inside ParaView (Data can also be exported to be plotted in your favorite plot package).

### Mapping 3D data into a plane

The same integration tool can be used in a different way for the case of 3D data. In those cases a line can be used instead of a plane for the integral. This allows the integration of the 3D volume data into a plane:

### Poisson solver

Another tool provided by Epsilon is a Poisson equation solver. This tool is required by the **Maskell method** in order to calculate the **induced drag**. This tool solves the Poisson equation starting from the axial vorticity field and gives the related stream function: